CN113136073B - Low-temperature-resistant impact-resistant polypropylene elastomer material and preparation method thereof - Google Patents
Low-temperature-resistant impact-resistant polypropylene elastomer material and preparation method thereof Download PDFInfo
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Abstract
The application relates to the field of materials, and particularly discloses a low-temperature-resistant impact-resistant polypropylene elastomer material and a preparation method thereof, wherein the polypropylene elastomer material is prepared from the following raw materials in parts by weight: 70-90 parts of PP, 5-15 parts of PE and 15-30 parts of compatilizer, wherein the compatilizer comprises 5-10 parts of PP-G-MAH and 5-10 parts of PE-G-MAH, and also comprises 5-10 parts of POE-G-MAH or 5-10 parts of EPDM-G-MAH and 5-10 parts of SEBS-G-MAH; the preparation method comprises the following steps: s1, weighing PP, PE and a compatilizer, and mixing and stirring for 3-8min at the rotating speed of 1000-2000r/min to prepare a mixture; s2, melting, extruding and granulating the mixture prepared in the S1 at the temperature of 150-220 ℃, and cooling to prepare a polypropylene elastomer material; has the advantages of improving the low temperature resistance and the impact resistance of the PP material.
Description
Technical Field
The application relates to the technical field of PP materials, in particular to a low-temperature-resistant and impact-resistant polypropylene elastomer material and a preparation method thereof.
Background
Polypropylene is a colorless, odorless, nontoxic and semitransparent solid substance, has chemical resistance, heat resistance, electrical insulation, high-strength mechanical properties, good high-wear-resistance processing properties and the like, and is widely applied to various fields of machinery, automobiles, electronic appliances, buildings, textiles, packaging, agriculture, forestry, fishery, food industry and the like.
However, the traditional PP material has poor low temperature resistance and impact resistance, white marks are easy to generate, a toughening agent is generally added for improvement, the toughening agent mainly comprises inorganic nano particles, inorganic rigid particles and rubber, wherein the toughening principle of the inorganic nano particles and the inorganic rigid particles is that the toughening effect of the inorganic nano particles and the inorganic rigid particles is utilized, the toughness and the strength of the PP are improved through the particle size of the filling particles and the binding force between the PP, and the rubber toughens plastics by an elastic particle dispersed structure to improve the toughness and the impact strength of the PP; neither the filling effect nor the dispersed structure bonding is true fusion with the PP material, so that the problem of incompatibility is easy to occur after curing, and phase separation is easy to occur in some cases, so that the conventional toughening agent has no obvious or unstable effect on improving the low-temperature resistance and the impact resistance of the PP material.
Therefore, it is a problem to be solved to improve the low temperature resistance and impact resistance of PP materials.
Disclosure of Invention
In order to improve the low-temperature resistance and the impact resistance of the PP material, the application provides a low-temperature-resistant impact-resistant polypropylene elastomer material.
In a first aspect, the application provides a low-temperature-resistant impact-resistant polypropylene elastomer material, which adopts the following technical scheme: a low-temperature-resistant impact-resistant polypropylene elastomer material is prepared from the following raw materials in parts by weight: 70-90 parts of PP, 5-15 parts of PE and 15-30 parts of compatilizer, wherein the compatilizer comprises 5-10 parts of PP-G-MAH and 5-10 parts of PE-G-MAH, and further comprises 5-10 parts of POE-G-MAH or 5-10 parts of EPDM-G-MAH and 5-10 parts of SEBS-G-MAH.
By adopting the technical scheme, the PP, the PE and the compatilizer are matched, and the compactness of the generated polypropylene elastomer material is improved by improving the bonding effect among the raw materials, so that the low temperature resistance and the impact resistance of the polypropylene elastomer material are improved.
POE is ethylene-octene copolymer, which is a polyolefin elastomer, and a flexible chain curling structure of octene and a crystallized ethylene chain are used as physical crosslinking points, so that POE has good toughness, and the POE has narrow molecular weight distribution, good fluidity and good compatibility with PP and PE; the POE-G-MAH is a maleic anhydride grafted ethylene-octene copolymer, the compatibility of POE with PP and PE materials is further improved by utilizing the grafting effect of maleic anhydride, and the POE is firmly bonded in the PP materials by utilizing the bonding effect of maleic anhydride grafting, so that the prepared polypropylene elastomer material has excellent low temperature resistance, heat resistance and aging resistance, and simultaneously, the prepared polypropylene elastomer material has excellent impact resistance through a tight connecting structure.
EPDM is ethylene propylene diene monomer, is the terpolymer of ethylene, propylene and non-conjugated diene, EPDM and PP are similar in structure and have good compatibility, EPDM-G-MAH is maleic anhydride grafted ethylene propylene diene monomer, the bonding effect of EPDM and PP materials is further improved through the bonding effect of maleic anhydride grafting, and the elastomer is dispersed in the PP matrix through mechanical force, so that the low temperature resistance and the impact resistance of the polypropylene elastomer material are improved.
SEBS is a linear triblock copolymer which takes polystyrene as a terminal segment and takes an ethylene-butylene copolymer obtained by hydrogenation of polybutadiene as a middle elastic block, is a thermoplastic elastomer rubber material and has good plasticity, high elasticity, heat resistance and aging resistance; the compatibility of the SEBS and the PP material is improved through the bonding effect of maleic anhydride grafting, so that the impact strength of the PP material is improved.
Preferably, the feed is prepared from the following raw materials in parts by weight: 70-90 parts of PP, 5-15 parts of PE, 15-30 parts of compatilizer and 0.1-4 parts of stabilizer, wherein the compatilizer comprises 5-10 parts of PP-G-MAH, 5-10 parts of PE-G-MAH and 5-10 parts of POE-G-MAH.
By adopting the technical scheme, the stabilizer, the PP-G-MAH, the PE-G-MAH and the POE-G-MAH are matched, so that the stabilizer is uniformly dispersed in PP and PE matrixes, and the stabilizer is stably bonded on the PP and PE matrixes under the matching condition of the maleic anhydride graft; meanwhile, the stabilizer is matched with POE, so that the low temperature resistance and the impact resistance of the polypropylene elastic material are further improved.
Preferably, the stabilizer consists of an ultraviolet light absorber UV-326, an antioxidant 1010 and an antioxidant 1076 in a weight ratio of 1.
By adopting the technical scheme, the polypropylene elastomer material is aged and embrittled under the ultraviolet and oxidation conditions, and the polypropylene elastomer material after embrittled has reduced low-temperature resistance and reduced impact resistance.
The polypropylene elastomer material has better ultraviolet resistance and oxidation resistance by utilizing the matching of the ultraviolet absorber and the antioxidant, so that the polypropylene elastomer material is not easy to age and has good low-temperature resistance and impact resistance even after being used for a long time.
Preferably, the feed is prepared from the following raw materials in parts by weight: 70-90 parts of PP, 5-15 parts of PE, 15-30 parts of compatilizer and 0.1-2 parts of white oil, wherein the compatilizer comprises 5-10 parts of PP-G-MAH, 5-10 parts of PE-G-MAH and 5-10 parts of EPDM-G-MAH.
By adopting the technical scheme, the EPDM and the white oil are matched, the EPDM and the white oil are mutually dissolved, and the toughness and the plasticity of the EPDM are improved by utilizing the good toughening effect of the white oil, so that the EPDM has higher strength in a PP matrix, and the low temperature resistance and the impact resistance of the polypropylene elastomer material are further improved.
Preferably, the feed also comprises the following raw materials in parts by weight: 1-3 parts of polyisoprene and 2-5 parts of chitosan powder.
By adopting the technical scheme, the aging trend of the polypropylene elastomer material can appear after the polypropylene elastomer material is used for a long time, the aged polypropylene elastomer material can gradually turn yellow and become brittle, when the polypropylene elastomer material is subjected to oxidative decomposition, hydrogen in methyl on a polypropylene carbon chain is easily removed, macromolecules in the polypropylene elastomer material are gradually subjected to chain scission reaction, the self impact resistance of the polypropylene elastomer material is influenced, and the impact resistance of the aged and brittle polypropylene elastomer material is lowered.
The polyisoprene and the chitosan powder are uniformly dispersed in the polypropylene elastomer material by matching the polyisoprene, the chitosan powder and the compatilizer, free hydrogen is prevented from moving by utilizing the connection between hydroxyl in chitosan molecules and free hydrogen through hydrogen bonds, and the prepared polypropylene elastomer material still has good toughness and impact resistance even if the prepared polypropylene elastomer material is aged by matching with the bonding effect of the aged polyisoprene.
Hydroxyl in chitosan molecules attracts free hydrogen to form intermolecular hydrogen bonds, and amino in the chitosan molecules can attract hydroxyl in polypropylene molecules, so that the chitosan molecules are adhered to the surfaces of the polypropylene molecules, the adsorbed hydrogen cannot be dissociated inside the polypropylene elastomer material, the molecular arrangement inside the polypropylene molecules is still orderly arranged, the polypropylene elastomer material is not easy to age due to the orderly arranged molecular structure, and the polypropylene elastomer material still has good impact strength even if being aged.
The viscosity of the aged polyisoprene is increased, and the bonding effect of chitosan in the polypropylene elastomer material is further improved by utilizing the viscosity increasing effect after aging, so that the polypropylene elastomer material still has good impact strength even if aging occurs.
Preferably, the feed also comprises the following raw materials in parts by weight: 1-3 parts of heat-insulating micro powder.
By adopting the technical scheme, the heat-insulating micro powder is matched with the chitosan powder, the heat-insulating micro powder does not conduct heat, is not easy to conduct cold, and the cold resistance of the polypropylene elastomer material is further improved by matching with the good film forming effect of the chitosan; and the compatibility of the heat-insulating micro powder and a PP matrix is improved by matching the heat-insulating micro powder and the compatilizer, and the impact strength of the polypropylene elastomer material is improved by the filling effect of the heat-insulating micro powder particles.
Preferably, the heat insulation micro powder consists of mineral powder and nano silicon dioxide in a weight ratio of 1:1-4.
By adopting the technical scheme, mineral powder and nano-silica are matched, and the movement of cold airflow is cut off by utilizing the porous structures of the mineral powder and the nano-silica, so that the polypropylene elastomer material has certain low-temperature resistance; and the porous structures of the mineral powder and the nano silicon dioxide can block ultraviolet channels, so that ultraviolet rays are absorbed, the aging time of the polypropylene elastomer material is delayed, and the polypropylene elastomer material has good impact resistance.
Preferably, the particle size of the mineral powder is 50-150nm.
By adopting the technical scheme, the main raw material of the mineral powder is silicon dioxide which is in a regular tetrahedron net structure, and the mineral powder and the nano silicon dioxide can form a compact crystal structure by limiting the particle size of the mineral powder, so that the structural stability of the polypropylene elastomer material is improved, and the impact resistance of the polypropylene elastomer material is improved.
Preferably, the feed also comprises the following raw materials in parts by weight: 3-7 parts of acetic acid aqueous solution.
By adopting the technical scheme, the acetic acid aqueous solution, the chitosan powder, the mineral powder and the nano silicon dioxide are matched, the acetic acid aqueous solution can dissolve the chitosan powder, the viscosity of the dissolved chitosan is improved, the hydroxyl and the amino in chitosan molecules are more active, and the probability of contact with free hydrogen is increased by matching the water absorption swelling effect of the chitosan powder, so that the chitosan is easier to form intermolecular hydrogen bonds with the free hydrogen, and the amino in the chitosan is attracted with the hydroxyl in the polypropylene, so that the free hydrogen is further fixed, and the aging of the polypropylene elastomer material is delayed.
The mineral powder and the nano-silica have good water absorption effect, after the chitosan powder is dissolved, the mineral powder and the nano-silica can absorb water in the chitosan, and the chitosan is dissolved to achieve good bonding effect, so that the mineral powder and the nano-silica are adhered to the surface of the PP material and are close to the chitosan, namely the mineral powder, the nano-silica, the chitosan and the PP form a space network structure, free hydrogen is further bound, and the impact resistance of the polypropylene elastomer material is further improved.
In a second aspect, the application provides a preparation method of a low-temperature-resistant impact-resistant polypropylene elastomer material, which adopts the following technical scheme:
a preparation method of a low-temperature-resistant impact-resistant polypropylene elastomer material comprises the following steps:
s1, weighing PP, PE and a compatilizer, and mixing and stirring for 3-8min at the rotating speed of 1000-2000r/min to prepare a mixture;
and S2, melting, extruding and granulating the mixture prepared in the S1 at the temperature of 150-220 ℃, and cooling to obtain the polypropylene elastomer material.
By adopting the technical scheme, the raw materials are stirred at a high speed after being mixed, so that the raw materials are mixed uniformly and then are subjected to melt extrusion granulation, and the polypropylene elastomer material is simple to prepare and easy to produce.
In summary, the present application has the following beneficial effects:
1. PP and PE are matched with the compatilizer, and the compactness of the generated polypropylene elastomer material is improved by improving the bonding effect among the raw materials, so that the low-temperature resistance and the impact resistance of the polypropylene elastomer material are improved.
2. The heat insulation micro powder, the ultraviolet absorbent and the antioxidant are matched, and the aging of the polypropylene elastomer material under the action of ultraviolet radiation and oxidation at a higher temperature is avoided through the heat insulation effect, so that the aging time of the polypropylene elastomer material is delayed.
3. The polyisoprene, the chitosan powder and the compatilizer are matched to uniformly disperse the polyisoprene and the chitosan powder in the polypropylene elastomer material, free hydrogen is prevented from moving by utilizing the constraint of chitosan molecules on the free hydrogen, and the prepared polypropylene elastomer material still has good toughness and impact resistance even if the prepared polypropylene elastomer material is aged by matching with the bonding effect of the aged polyisoprene.
Detailed Description
The present application will be described in further detail with reference to examples.
Examples
PP in the following raw materials was purchased from Xintong Tung plastics materials Co., ltd, dongguan, under the brand name 8002; PE is purchased from low density polyethylene manufactured by Shanghai super-cyclone chemical technology Co., ltd., under the brand name MB9500; PP-G-MAH is purchased from Shanghao plastics materials Co., ltd, dongguan, model 350K; PE-G-MAH is purchased from Hangzhou gold micro-nano new material Co., ltd; POE-G-MAH, EPDM-G-MAH, SEBS-G-MAH were purchased from Xiamen Eisen plastics science and technology Co., ltd; polyisoprene was purchased from Chu scintillation Biotech, inc. in Hubei; chitosan powder was purchased from Shandong Haidebei Biotech limited; the mineral powder is purchased from a Lingshengyi Xin mineral product processing factory; other raw materials and equipment are all sold in the market.
Example 1: a preparation method of a low-temperature-resistant impact-resistant polypropylene elastomer material comprises the following steps:
s1, weighing 80kgPP, 10kgPE and 24kg of compatilizer, placing the compatilizer in a high-speed stirring barrel, and mixing and stirring for 5min at the rotating speed of 1500r/min to obtain a mixture; the compatilizer consists of 8kgPP-G-MAH, 8kgPE-G-MAH and 8 kgPOE-G-MAH;
and S2, placing the mixture prepared in the S1 in a hopper of a double-screw extruder, performing melt extrusion granulation at the temperature of 200 ℃, and cooling to obtain the polypropylene elastomer material.
Example 2: a preparation method of a low-temperature-resistant impact-resistant polypropylene elastomer material comprises the following steps:
s1, weighing 70kgPP, 15kgPE and 30kg of compatilizer, placing the materials in a high-speed stirring barrel, and mixing and stirring for 8min at the rotating speed of 1000r/min to obtain a mixture; the compatilizer consists of 10kgPP-G-MAH, 10kgPE-G-MAH and 10 kgPOE-G-MAH;
and S2, placing the mixture prepared in the S1 in a hopper of a double-screw extruder, performing melt extrusion granulation at the temperature of 150 ℃, and cooling to obtain the polypropylene elastomer material.
Example 3: a preparation method of a low-temperature-resistant impact-resistant polypropylene elastomer material comprises the following steps:
s1, weighing 90kg of PP, 5kg of PE and 15kg of compatilizer, placing the materials in a high-speed stirring barrel, and mixing and stirring the materials for 3min at a rotating speed of 2000r/min to obtain a mixture; the compatilizer consists of 5kgPP-G-MAH, 5kgPE-G-MAH and 5 kgPOE-G-MAH;
and S2, placing the mixture prepared in the S1 in a hopper of a double-screw extruder, performing melt extrusion granulation at 220 ℃, and cooling to obtain the polypropylene elastomer material.
Example 4: a preparation method of a low-temperature-resistant impact-resistant polypropylene elastomer material comprises the following steps:
s1, weighing 80kgPP, 10kgPE and 24kg of compatilizer, placing the compatilizer in a high-speed stirring barrel, and mixing and stirring for 5min at the rotating speed of 1500r/min to obtain a mixture; the compatilizer consists of 8kgPP-G-MAH, 8kgPE-G-MAH and 8 kgEPDM-G-MAH;
and S2, placing the mixture prepared in the S1 in a hopper of a double-screw extruder, performing melt extrusion granulation at the temperature of 200 ℃, and cooling to obtain the polypropylene elastomer material.
Example 5: a preparation method of a low-temperature-resistant impact-resistant polypropylene elastomer material comprises the following steps:
s1, weighing 70kgPP, 15kgPE and 30kg of compatilizer, placing the materials in a high-speed stirring barrel, and mixing and stirring for 8min at the rotating speed of 1000r/min to obtain a mixture; the compatilizer consists of 10kg of PP-G-MAH, 10kg of PE-G-MAH and 10kg of EPDM-G-MAH;
and S2, placing the mixture prepared in the S1 in a hopper of a double-screw extruder, performing melt extrusion granulation at the temperature of 150 ℃, and cooling to obtain the polypropylene elastomer material.
Example 6: a preparation method of a low-temperature-resistant impact-resistant polypropylene elastomer material comprises the following steps:
s1, weighing 90kg of PP, 5kg of PE and 15kg of compatilizer, placing the materials in a high-speed stirring barrel, and mixing and stirring the materials for 3min at a rotating speed of 2000r/min to obtain a mixture; the compatilizer consists of 5kgPP-G-MAH, 5kgPE-G-MAH and 5 kgEPDM-G-MAH;
and S2, placing the mixture prepared in the S1 in a hopper of a double-screw extruder, performing melt extrusion granulation at 220 ℃, and cooling to obtain the polypropylene elastomer material.
Example 7: a preparation method of a low-temperature-resistant impact-resistant polypropylene elastomer material comprises the following steps:
s1, weighing 80kgPP, 10kgPE and 24kg of compatilizer, placing the compatilizer in a high-speed stirring barrel, and mixing and stirring for 5min at the rotating speed of 1500r/min to obtain a mixture; the compatilizer consists of 8kgPP-G-MAH, 8kgPE-G-MAH and 8 kgSEBS-G-MAH;
and S2, placing the mixture prepared in the S1 in a hopper of a double-screw extruder, performing melt extrusion granulation at the temperature of 200 ℃, and cooling to obtain the polypropylene elastomer material.
Example 8: a preparation method of a low-temperature-resistant impact-resistant polypropylene elastomer material comprises the following steps:
s1, weighing 70kgPP, 15kgPE and 30kg of compatilizer, placing the materials in a high-speed stirring barrel, and mixing and stirring for 8min at the rotating speed of 1000r/min to obtain a mixture; the compatilizer consists of 10kgPP-G-MAH, 10kgPE-G-MAH and 10 kgSEBS-G-MAH;
and S2, placing the mixture prepared in the S1 in a hopper of a double-screw extruder, performing melt extrusion granulation at the temperature of 150 ℃, and cooling to obtain the polypropylene elastomer material.
Example 9: a preparation method of a low-temperature-resistant impact-resistant polypropylene elastomer material comprises the following steps:
s1, weighing 90kg of PP, 5kg of PE and 15kg of compatilizer, placing the materials in a high-speed stirring barrel, and mixing and stirring the materials for 3min at a rotating speed of 2000r/min to obtain a mixture; the compatilizer consists of 5kgPP-G-MAH, 5kgPE-G-MAH and 5 kgSEBS-G-MAH;
and S2, placing the mixture prepared in the S1 in a hopper of a double-screw extruder, performing melt extrusion granulation at 220 ℃, and cooling to obtain the polypropylene elastomer material.
Example 10: the present embodiment is different from embodiment 1 in that:
s1, weighing 80kg of PP, 10kg of PE and 24kg of compatilizer, placing the materials in a high-speed stirring barrel, mixing and stirring the materials for 5min at a rotating speed of 1500r/min, adding 2.7kg of stabilizer, and continuously stirring the materials for 5min to prepare a mixture; the stabilizer consists of an ultraviolet absorbent UV-326, an antioxidant 1010 and an antioxidant 1076 in a weight ratio of 1; the compatilizer consists of 8kgPP-G-MAH, 8kgPE-G-MAH and 8 kgPOE-G-MAH.
Example 11: the present embodiment is different from embodiment 2 in that:
s1, weighing 70kgPP, 15kgPE and 30kg of compatilizer, placing the materials in a high-speed stirring barrel, mixing and stirring for 8min at the rotating speed of 1000r/min, adding 0.1kg of stabilizer, and continuously stirring for 5min to obtain a mixture; the stabilizer consists of an ultraviolet absorbent UV-326, an antioxidant 1010 and an antioxidant 1076 in a weight ratio of 1; the compatilizer consists of 10kg of PP-G-MAH, 10kg of PE-G-MAH and 10kg of POE-G-MAH.
Example 12: the present embodiment is different from embodiment 3 in that:
s1, weighing 90kg of PP, 5kg of PE and 15kg of compatilizer, placing the materials in a high-speed stirring barrel, mixing and stirring the materials for 3min at a rotating speed of 2000r/min, and then adding 4kg of stabilizer to continue stirring for 5min to obtain a mixture; the stabilizer consists of an ultraviolet absorbent UV-326, an antioxidant 1010 and an antioxidant 1076 in a weight ratio of 1; the compatilizer consists of 5kgPP-G-MAH, 5kgPE-G-MAH and 5 kgPOE-G-MAH.
Example 13: this embodiment is different from embodiment 4 in that:
s1, weighing 80kg of PP, 10kg of PE and 24kg of compatilizer, placing the materials in a high-speed stirring barrel, mixing and stirring the materials for 5min at the rotating speed of 1500r/min, adding 1.2kg of white oil, and continuously stirring the materials for 5min to prepare a mixture; the compatilizer consists of 8kg of PP-G-MAH, 8kg of PE-G-MAH and 8kg of EPDM-G-MAH.
Example 14: this embodiment is different from embodiment 5 in that:
s1, weighing 70kgPP, 15kgPE and 30kg of compatilizer, placing the materials in a high-speed stirring barrel, mixing and stirring for 8min at the rotating speed of 1000r/min, adding 0.1kg of white oil, and continuously stirring for 5min to obtain a mixture; the compatilizer consists of 10kg of PP-G-MAH, 10kg of PE-G-MAH and 10kg of EPDM-G-MAH.
Example 15: this embodiment is different from embodiment 6 in that:
s1, weighing 90kg of PP, 5kg of PE and 15kg of compatilizer, placing the materials in a high-speed stirring barrel, mixing and stirring the materials for 3min at the rotating speed of 2000r/min, adding 2kg of white oil, and continuing to stir for 5min to obtain a mixture; the compatilizer consists of 5kg of PP-G-MAH, 5kg of PE-G-MAH and 5kg of EPDM-G-MAH.
Example 16: the present embodiment is different from embodiment 10 in that:
s1, weighing 80kg of PP, 10kg of PE and 24kg of compatilizer, placing the materials in a high-speed stirring barrel, mixing and stirring the materials for 5min at the rotating speed of 1500r/min, adding 2.7kg of stabilizer, continuously stirring the materials for 5min, adding 2kg of polyisoprene and 3.5kg of chitosan powder, and continuously stirring the materials for 8min to prepare a mixture; the stabilizer consists of an ultraviolet absorbent UV-326, an antioxidant 1010 and an antioxidant 1076 in a weight ratio of 1; the compatilizer consists of 8kgPP-G-MAH, 8kgPE-G-MAH and 8 kgPOE-G-MAH.
Example 17: the present embodiment is different from embodiment 10 in that:
s1, weighing 80kg of PP, 10kg of PE and 24kg of compatilizer, placing the materials in a high-speed stirring barrel, mixing and stirring the materials for 5min at the rotating speed of 1500r/min, adding 2.7kg of stabilizer, continuously stirring the materials for 5min, adding 1kg of polyisoprene and 2kg of chitosan powder, and continuously stirring the materials for 5min to prepare a mixture; the stabilizer consists of an ultraviolet absorbent UV-326, an antioxidant 1010 and an antioxidant 1076 in a weight ratio of 1; the compatilizer consists of 8kgPP-G-MAH, 8kgPE-G-MAH and 8 kgPOE-G-MAH.
Example 18: the present embodiment is different from embodiment 10 in that:
s1, weighing 80kg of PP, 10kg of PE and 24kg of compatilizer, placing the materials in a high-speed stirring barrel, mixing and stirring the materials for 5min at the rotating speed of 1500r/min, adding 2.7kg of stabilizer, continuously stirring the materials for 5min, adding 3kg of polyisoprene and 5kg of chitosan powder, and continuously stirring the materials for 10min to prepare a mixture; the stabilizer consists of an ultraviolet absorbent UV-326, an antioxidant 1010 and an antioxidant 1076 in a weight ratio of 1; the compatilizer consists of 8kgPP-G-MAH, 8kgPE-G-MAH and 8 kgPOE-G-MAH.
Example 19: this embodiment is different from embodiment 16 in that:
s1, weighing 80kg of PP, 10kg of PE and 24kg of compatilizer, placing the materials in a high-speed stirring barrel, mixing and stirring the materials for 5min at the rotating speed of 1500r/min, adding 2.7kg of stabilizer, continuing to stir for 5min, adding 2kg of polyisoprene, 3.5kg of chitosan powder and 2.4kg of heat insulation micro powder, and continuing to stir for 10min to prepare a mixture; the heat insulation micro powder consists of mineral powder and nano silicon dioxide in a weight ratio of 1:2.2, and the particle size of the mineral powder is 50-150nm.
Example 20: this embodiment is different from embodiment 16 in that:
s1, weighing 80kg of PP, 10kg of PE and 24kg of compatilizer, placing the materials in a high-speed stirring barrel, mixing and stirring the materials for 5min at the rotating speed of 1500r/min, adding 2.7kg of stabilizer, continuously stirring the materials for 5min, adding 2kg of polyisoprene, 3.5kg of chitosan powder and 1kg of heat insulation micro powder, and continuously stirring the materials for 8min to obtain a mixture; the heat insulation micro powder consists of mineral powder and nano silicon dioxide in a weight ratio of 1:1, and the particle size of the mineral powder is 50-150nm.
Example 21: this embodiment is different from embodiment 16 in that:
s1, weighing 80kg of PP, 10kg of PE and 24kg of compatilizer, placing the materials in a high-speed stirring barrel, mixing and stirring the materials for 5min at the rotating speed of 1500r/min, adding 2.7kg of stabilizer, continuously stirring the materials for 5min, adding 2kg of polyisoprene, 3.5kg of chitosan powder and 3kg of heat insulation micro powder, and continuously stirring the materials for 12min to obtain a mixture; the heat-insulating micro powder consists of mineral powder and nano silicon dioxide in a weight ratio of 1:4, and the particle size of the mineral powder is 50-150nm.
Example 22: this embodiment is different from embodiment 19 in that:
s1, weighing 3.5kg of chitosan powder and 5kg of acetic acid aqueous solution, mixing, stirring for 5min at the rotating speed of 350r/min, then adding 0.75kg of mineral powder and 1.65kg of nano silicon dioxide, and continuously stirring for 3min to prepare a stirring solution;
s2, weighing 80kg of PP, 10kg of PE and 24kg of compatilizer, placing the materials in a high-speed stirring barrel, mixing and stirring the materials for 5min at the rotating speed of 1500r/min, adding 2.7kg of stabilizer, continuously stirring the materials for 5min, adding 2kg of polyisoprene and the stirring liquid prepared from the S1, and continuously stirring the materials for 10min to prepare a mixture.
Example 23: this embodiment is different from embodiment 19 in that:
s1, weighing 3.5kg of chitosan powder and 3kg of acetic acid aqueous solution, mixing, stirring for 5min at the rotating speed of 350r/min, then adding 0.75kg of mineral powder and 1.65kg of nano silicon dioxide, and continuously stirring for 3min to prepare a stirring solution;
s2, weighing 80kg of PP, 10kg of PE and 24kg of compatilizer, placing the materials in a high-speed stirring barrel, mixing and stirring the materials for 5min at the rotating speed of 1500r/min, adding 2.7kg of stabilizer, continuously stirring the materials for 5min, adding 2kg of polyisoprene and the stirring liquid prepared from the S1, and continuously stirring the materials for 10min to prepare a mixture.
Example 24: this embodiment is different from embodiment 19 in that:
s1, weighing 3.5kg of chitosan powder and 7kg of acetic acid aqueous solution, mixing, stirring for 5min at the rotating speed of 350r/min, then adding 0.75kg of mineral powder and 1.65kg of nano silicon dioxide, and continuously stirring for 3min to prepare a stirring solution;
s2, weighing 80kg of PP, 10kg of PE and 24kg of compatilizer, placing the materials in a high-speed stirring barrel, mixing and stirring the materials for 5min at the rotating speed of 1500r/min, adding 2.7kg of stabilizer, continuously stirring the materials for 5min, adding 2kg of polyisoprene and the stirring liquid prepared from the S1, and continuously stirring the materials for 10min to prepare a mixture.
Example 25: the present embodiment is different from embodiment 10 in that:
the antioxidant in the stabilizer replaces the ultraviolet absorbent with the antioxidant with the same quality.
Example 26: this embodiment is different from embodiment 16 in that:
the raw material is replaced by polyisoprene with the same mass for chitosan powder.
Example 27: this embodiment is different from embodiment 16 in that:
the raw materials are replaced by the same mass of chitosan powder.
Example 28: this embodiment is different from embodiment 19 in that:
the mineral powder is replaced by nano silicon dioxide with the same mass in the heat-insulating micro powder.
Example 29: this embodiment is different from embodiment 19 in that:
the particle size of the mineral powder is 50-100 μm.
Note: stabilizers include, but are not limited to, UV-326, UV absorbers, antioxidants 1010, 1076.
Comparative example
Comparative example 1: the comparative example differs from example 1 in that: the raw materials are not added with a compatilizer.
Performance test
1. Impact strength test
The polypropylene elastomer materials prepared in examples 1 to 29 and comparative example 1 were tested for their respective impact strength at 23 ℃ in the form of a bar of 80mm × 10mm × 4mm by the method of GB/T12670-2008 polypropylene resin.
2. Low temperature resistance
The test samples prepared by the preparation methods of the examples 1 to 29 and the comparative example 1 are respectively used for preparing test samples, the test samples are 80mm multiplied by 10mm multiplied by 4mm long test samples, the test samples are placed in an environment with the temperature of minus 40 ℃ for 24 hours, the test samples are taken out, and the impact strength of the simply supported beam notch of the polypropylene elastomer materials prepared by the examples 1 to 29 and the comparative example 1 is detected by a method of GB/T12670-2008 polypropylene resin under the condition of 23 ℃.
3. Aging Performance test
Preparing samples by adopting the preparation methods of examples 1-29 and comparative example 1 respectively, wherein the samples are 80mm multiplied by 10mm multiplied by 4mm long-strip samples, placing the samples at 60 ℃, irradiating the samples under the condition that the ultraviolet wavelength is 300nm, after irradiating for 800h, respectively detecting the notch impact strength and the breaking elongation of the simple beam of the examples 1-29 and comparative example 1, detecting the notch impact strength of the simple beam of the polypropylene elastomer materials prepared in the examples 1-29 and comparative example 1 by adopting the method of GB/T12670-2008 polypropylene resin, and detecting the notch impact strength of the simple beam of the polypropylene elastomer materials prepared in the examples 1-29 and comparative example 1 at 23 ℃; and testing on a universal electronic tensile testing machine according to GB/T1040-2006, wherein the testing speed is 50mm/min, and detecting the elongation at break.
TABLE 1 test chart for polypropylene elastomer material
As can be seen by combining examples 1-3 with comparative example 1 and by combining Table 1, POE-G-MAH was used as the compatibilizer in the raw materials of examples 1-3, no compatibilizer was added to the raw material of comparative example 1, the polypropylene elastomer material prepared in comparative example 1 was inferior in both low temperature resistance and impact resistance to example 1, and the polypropylene elastomer material prepared in comparative example 1 was inferior in both impact resistance and elongation at break to example 1 after aging; the POE-G-MAH is matched with PP and PE, and the bonding effect of maleic anhydride grafting is utilized to ensure that POE is firmly bonded in a PP material, so that the polypropylene elastomer material has excellent low temperature resistance, heat resistance and aging resistance, and simultaneously, the polypropylene elastomer material has excellent impact resistance through a tight connecting structure.
As can be seen by combining examples 4-6 with comparative example 1 and table 1, the compatibilizer in the raw materials of examples 4-6 is EPDM-G-MAH, the compatibilizer is not added to the raw material of comparative example 1, the low temperature resistance and the impact resistance of the polypropylene elastomer material prepared in comparative example 1 are inferior to those of example 4, and the impact resistance and the elongation at break of the polypropylene elastomer material prepared in comparative example 1 after aging are reduced compared with those of example 4; the EPDM-G-MAH is used as a compatilizer, the bonding effect of maleic anhydride grafting is utilized to bond the EPDM in a PP material matrix, and the good bonding effect of the EPDM is utilized to improve the low temperature resistance, the impact resistance, the aging resistance and the like of a polypropylene elastomer material.
As can be seen by combining examples 7-9 with comparative example 1 and by combining Table 1, the compatibilizer in the raw materials of examples 7-9 was SEBS-G-MAH, the compatibilizer was not added to the raw material of comparative example 1, the polypropylene elastomer material prepared in comparative example 1 had poor low-temperature resistance and impact resistance compared with example 7, and the polypropylene elastomer material prepared in comparative example 1 had poor impact resistance and elongation at break after aging compared with example 7; the compatibility of the SEBS and the PP material can be improved under the bonding effect of maleic anhydride grafting, so that the impact strength, the impact resistance and the aging resistance of the polypropylene elastomer material are improved.
Combining examples 10-12 and examples 1-3 with Table 1, it can be seen that the impact strength of the polypropylene elastomer materials prepared in examples 10-12 is higher than that of examples 1-3, and the impact strength and elongation at break of the polypropylene elastomer materials prepared in examples 10-12 are higher than that of examples 1-3 after aging, when the stabilizer is added to the raw materials of examples 10-12; the ultraviolet absorber and the antioxidant in the stabilizer are matched, so that the prepared polypropylene elastomer material has good ultraviolet radiation resistance and oxidation resistance, the polypropylene elastomer material is not easy to age, and the polypropylene elastomer material still has good low temperature resistance and impact resistance even after being used for a long time.
Combining examples 13-15 and examples 4-6 with Table 1, it can be seen that the addition of white oil to the raw materials of examples 13-15 resulted in polypropylene elastomer materials with higher impact strength than example 4 and polypropylene elastomer materials with higher impact strength and higher elongation at break than example 4 after aging for the polypropylene elastomer materials prepared in examples 13-15; the blending of EPDM and white oil is demonstrated, the good toughening effect of the white oil is utilized to improve the toughness and plasticity of the EPDM, so that the EPDM has higher strength in a PP matrix, and the low temperature resistance and the impact resistance of the polypropylene elastomer material are further improved.
Combining examples 16-18 and examples 10-12 with Table 1, it can be seen that the low temperature resistance and the impact strength of the polypropylene elastomer materials prepared in examples 16-18 are higher than those of example 10, and the impact strength and the elongation at break of the polypropylene elastomer materials prepared in examples 16-18 after aging are better than those of example 10, when polyisoprene and chitosan powder are added into the raw materials of examples 16-18; the matching of the polyisoprene, the chitosan powder and the compatilizer is shown, so that the polyisoprene and the chitosan powder are uniformly dispersed in the polypropylene elastomer material, the chitosan molecules are utilized to bind hydrogen, the movement of free hydrogen is avoided, and the bonding effect of the aged polyisoprene is matched, so that the prepared polypropylene elastomer material still has good toughness and impact resistance even if the prepared polypropylene elastomer material is aged.
By combining examples 19-21 and examples 16-18 with table 1, it can be seen that the heat-insulating micropowder is added into the raw materials of examples 19-21, the low-temperature resistance and the impact strength of the polypropylene elastomer materials prepared in examples 19-21 are slightly higher than those of example 16, and the impact strength and the elongation at break of the polypropylene elastomer materials prepared in examples 19-21 after aging are better than those of example 16; the mineral powder, the nano silicon dioxide and the chitosan powder are matched to improve the low temperature resistance of the polypropylene elastomer material; the heat-insulating micro powder and the compatilizer are matched to improve the compatibility of the heat-insulating micro powder and the PP matrix, the impact strength of the polypropylene elastomer material is improved through the filling effect of the heat-insulating micro powder particles, and the polypropylene elastomer material still has good impact strength and elongation at break after aging through the nanometer filling effect.
By combining examples 22-24 and examples 19-21 with table 1, it can be seen that the addition of the aqueous solution of acetic acid to the raw materials of examples 22-24 resulted in polypropylene elastomer materials prepared in examples 22-24 having slightly higher low temperature resistance and impact strength than those of example 19, and polypropylene elastomer materials prepared in examples 22-24 having better impact strength and elongation at break than those of example 19 after aging; the cooperation of the acetic acid aqueous solution, the chitosan powder, the mineral powder and the nano silicon dioxide is shown to further improve the contact probability of free hydrogen in the polypropylene elastomer material and hydroxyl in the chitosan, and the space network structure is also matched to further restrict the free hydrogen, so that the polypropylene elastomer material still has good impact resistance and elongation at break even after aging.
Combining example 25 with examples 10-12 and table 1, it can be seen that, in example 25, the antioxidant is replaced by the antioxidant with the same quality as the ultraviolet absorber in the raw material of the stabilizer, compared with example 10, the low temperature resistance and the impact strength of the polypropylene elastomer material prepared in example 25 are slightly lower than those of example 10, and the impact strength and the elongation at break of the polypropylene elastomer material prepared in example 25 after aging are lower than those of example 10; the ultraviolet absorber and the antioxidant are matched, so that the polypropylene elastomer material has better ultraviolet resistance and oxidation resistance, the polypropylene elastomer material is not easy to age, and the polypropylene elastomer material still has good low-temperature resistance and impact resistance even after being used for a long time.
Combining example 26 with examples 16-18 and table 1, it can be seen that, when the chitosan powder is replaced by polyisoprene with the same mass in the raw material of example 26, compared with example 16, the low temperature resistance and the impact strength of the polypropylene elastomer material prepared in example 26 are slightly lower than those of example 16, and the impact strength of the polypropylene elastomer material prepared in example 26 after aging is lower than that of example 16, and the elongation at break is slightly higher than that of example 16; it is shown that the combination of polyisoprene and chitosan powder provides the polypropylene elastomer material with good low temperature resistance and impact strength, and the prepared polypropylene elastomer material still has good impact strength after aging, and the viscosity of polyisoprene after aging is increased, so the elongation at break of the polypropylene elastomer material prepared in example 26 after aging is higher than that of example 16.
Combining example 27 with examples 16-18 and table 1, it can be seen that, when the chitosan powder of the same mass is substituted for polyisoprene in the raw material of example 27, compared with example 16, the polypropylene elastomer material prepared in example 27 has slightly lower low temperature resistance and impact strength than those of example 16, and the polypropylene elastomer material prepared in example 27 has lower impact strength and elongation at break than those of example 16 after aging; the method shows that the self adhesion of the chitosan powder is not increased after the chitosan powder is aged, so that the elongation at break of the prepared polypropylene elastomer material is weakened.
Combining examples 28-29 and examples 19-21 with Table 1, it can be seen that the raw material of example 28 has the same mass of nano-silica instead of mineral powder, the particle size of the mineral powder in the raw material of example 29 is 50-100 μm, compared to example 19, the polypropylene elastomer materials prepared in examples 28-29 have slightly lower low temperature resistance and impact strength than those of example 19, and the polypropylene elastomer materials prepared in examples 28-29 have lower impact strength and elongation at break than those of example 19 after aging; the mineral powder and the nano silicon dioxide can form a compact filling structure through the change of the crystal form of the mineral powder and the nano silicon dioxide, so that the prepared polypropylene elastomer material has good low-temperature resistance and impact strength, and still has good impact strength and elongation at break after aging.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (5)
1. The low-temperature-resistant impact-resistant polypropylene elastomer material is characterized by being prepared from the following raw materials in parts by weight: 70-90 parts of PP, 5-15 parts of PE, 15-30 parts of compatilizer, 0.1-4 parts of stabilizer, 1-3 parts of polyisoprene and 2-5 parts of chitosan powder, wherein the compatilizer comprises 5-10 parts of PP-G-MAH, 5-10 parts of PE-G-MAH, 5-10 parts of POE-G-MAH or 5-10 parts of EPDM-G-MAH and 5-10 parts of SEBS-G-MAH; the stabilizer consists of an ultraviolet absorbent UV-326, an antioxidant 1010 and an antioxidant 1076 in a weight ratio of 1.
2. The low-temperature-resistant impact-resistant polypropylene elastomer material as claimed in claim 1, further comprising the following raw materials in parts by weight: 1-3 parts of heat-insulating micro powder.
3. The low-temperature-resistant impact-resistant polypropylene elastomer material as claimed in claim 2, wherein the heat-insulating micro powder is composed of mineral powder and nano silica in a weight ratio of 1:1-4.
4. The low-temperature-resistant impact-resistant polypropylene elastomer material as claimed in claim 3, wherein the mineral powder has a particle size of 50-150nm.
5. The low-temperature-resistant impact-resistant polypropylene elastomer material according to claim 3, further comprising the following raw materials in parts by weight: 3-7 parts of acetic acid aqueous solution.
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