CN115651311A - Weather-resistant self-bonding polyolefin material and preparation method thereof - Google Patents
Weather-resistant self-bonding polyolefin material and preparation method thereof Download PDFInfo
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- CN115651311A CN115651311A CN202211333726.8A CN202211333726A CN115651311A CN 115651311 A CN115651311 A CN 115651311A CN 202211333726 A CN202211333726 A CN 202211333726A CN 115651311 A CN115651311 A CN 115651311A
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- 239000000463 material Substances 0.000 title claims abstract description 52
- 229920000098 polyolefin Polymers 0.000 title claims abstract description 32
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 239000004743 Polypropylene Substances 0.000 claims abstract description 53
- -1 polypropylene Polymers 0.000 claims abstract description 44
- 229920001155 polypropylene Polymers 0.000 claims abstract description 42
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 25
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 22
- 239000003365 glass fiber Substances 0.000 claims abstract description 20
- 229920005989 resin Polymers 0.000 claims abstract description 17
- 239000011347 resin Substances 0.000 claims abstract description 17
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 6
- 239000011256 inorganic filler Substances 0.000 claims abstract description 5
- 229910003475 inorganic filler Inorganic materials 0.000 claims abstract description 5
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 34
- 239000000155 melt Substances 0.000 claims description 26
- 239000000203 mixture Substances 0.000 claims description 17
- 229920001935 styrene-ethylene-butadiene-styrene Polymers 0.000 claims description 15
- 238000002156 mixing Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 11
- 239000000178 monomer Substances 0.000 claims description 11
- 239000003513 alkali Substances 0.000 claims description 9
- 229920006124 polyolefin elastomer Polymers 0.000 claims description 9
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- 239000000314 lubricant Substances 0.000 claims description 7
- 239000003208 petroleum Substances 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 7
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 6
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 4
- 239000012752 auxiliary agent Substances 0.000 claims description 4
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 4
- 239000005038 ethylene vinyl acetate Substances 0.000 claims description 4
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- JMTMSDXUXJISAY-UHFFFAOYSA-N 2H-benzotriazol-4-ol Chemical compound OC1=CC=CC2=C1N=NN2 JMTMSDXUXJISAY-UHFFFAOYSA-N 0.000 claims description 3
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- NPZTUJOABDZTLV-UHFFFAOYSA-N hydroxybenzotriazole Substances O=C1C=CC=C2NNN=C12 NPZTUJOABDZTLV-UHFFFAOYSA-N 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical group OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 claims description 3
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- 239000005995 Aluminium silicate Substances 0.000 claims description 2
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- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims description 2
- 229920006242 ethylene acrylic acid copolymer Polymers 0.000 claims description 2
- 229920006226 ethylene-acrylic acid Polymers 0.000 claims description 2
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 2
- 239000000654 additive Substances 0.000 claims 1
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- 239000004594 Masterbatch (MB) Substances 0.000 abstract description 4
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- DAKWPKUUDNSNPN-UHFFFAOYSA-N Trimethylolpropane triacrylate Chemical compound C=CC(=O)OCC(CC)(COC(=O)C=C)COC(=O)C=C DAKWPKUUDNSNPN-UHFFFAOYSA-N 0.000 description 10
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- YLLIGHVCTUPGEH-UHFFFAOYSA-M potassium;ethanol;hydroxide Chemical compound [OH-].[K+].CCO YLLIGHVCTUPGEH-UHFFFAOYSA-M 0.000 description 4
- 125000006850 spacer group Chemical group 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 3
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- AKPUJVVHYUHGKY-UHFFFAOYSA-N hydron;propan-2-ol;chloride Chemical compound Cl.CC(C)O AKPUJVVHYUHGKY-UHFFFAOYSA-N 0.000 description 3
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- KOMNUTZXSVSERR-UHFFFAOYSA-N 1,3,5-tris(prop-2-enyl)-1,3,5-triazinane-2,4,6-trione Chemical compound C=CCN1C(=O)N(CC=C)C(=O)N(CC=C)C1=O KOMNUTZXSVSERR-UHFFFAOYSA-N 0.000 description 2
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical compound C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 description 2
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- KJFMBFZCATUALV-UHFFFAOYSA-N phenolphthalein Chemical compound C1=CC(O)=CC=C1C1(C=2C=CC(O)=CC=2)C2=CC=CC=C2C(=O)O1 KJFMBFZCATUALV-UHFFFAOYSA-N 0.000 description 2
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- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 1
- JKIJEFPNVSHHEI-UHFFFAOYSA-N Phenol, 2,4-bis(1,1-dimethylethyl)-, phosphite (3:1) Chemical compound CC(C)(C)C1=CC(C(C)(C)C)=CC=C1OP(OC=1C(=CC(=CC=1)C(C)(C)C)C(C)(C)C)OC1=CC=C(C(C)(C)C)C=C1C(C)(C)C JKIJEFPNVSHHEI-UHFFFAOYSA-N 0.000 description 1
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- PWWSSIYVTQUJQQ-UHFFFAOYSA-N distearyl thiodipropionate Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)CCSCCC(=O)OCCCCCCCCCCCCCCCCCC PWWSSIYVTQUJQQ-UHFFFAOYSA-N 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
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- FWDBOZPQNFPOLF-UHFFFAOYSA-N ethenyl(triethoxy)silane Chemical compound CCO[Si](OCC)(OCC)C=C FWDBOZPQNFPOLF-UHFFFAOYSA-N 0.000 description 1
- WOXXJEVNDJOOLV-UHFFFAOYSA-N ethenyl-tris(2-methoxyethoxy)silane Chemical compound COCCO[Si](OCCOC)(OCCOC)C=C WOXXJEVNDJOOLV-UHFFFAOYSA-N 0.000 description 1
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- SSDSCDGVMJFTEQ-UHFFFAOYSA-N octadecyl 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)CCC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 SSDSCDGVMJFTEQ-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention relates to a weather-resistant self-bonding polyolefin material and a preparation method thereof. The polyolefin material comprises the following components in parts by weight: 25-35 parts of polypropylene; 20-30 parts of a compatilizer; 10-15 parts of glass fiber; 5-10 parts of tackifying resin; 0.2-2 parts of antioxidant; 0.2-2 parts of a weather-resistant agent; 15-20 parts of inorganic filler; 1-4 parts of carbon black master batch. The polyolefin material has good bonding strength, rigidity, toughness and weather resistance.
Description
Technical Field
The invention belongs to the technical field of polymer composite materials, and particularly relates to a weather-resistant self-bonding polyolefin material and a preparation method thereof.
Background
Based on the requirements of environmental protection, energy conservation, consumption reduction and the like, the hollow glass spacing strip is used as a heat-insulating component, and the requirements on heat-insulating property, sealing property, environmental protection, durability and the like are improved. The polymer composite material used as the warm edge spacer has high requirements on rigidity, adhesiveness and lasting weather resistance.
The existing patent technologies are mostly improvement on a composite structure or process of metal profiles and plastic profiles. Chinese patent CN105089449A discloses that the adhesive composite molding is completed by designing stainless steel section and modified polypropylene section, and then designing the section in a form of buckling the paired openings. This design has reduced the plastics holding surface on space bar top for coefficient of heat conductivity is lower, has compromise the performance of can bending simultaneously. However, the invention cannot completely separate from metal materials, and has the problems of complicated profile structure design and composite process and the like.
Chinese patent CN110551341A discloses a polypropylene composite material for warm edge spacer, which ensures the heat insulation, bonding durability and sealing performance of the material, but the bonding performance of the material interface is poor, and the weather resistance is also relatively poor. Therefore, the polyolefin material for the self-bonding warm edge spacer has good weather resistance and balanced rigidity and bonding property, which is a problem urgently needed to be solved by the current consumer market.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a weather-resistant self-bonding polyolefin material and a preparation method thereof, so as to overcome the defects that in the prior art, the polyolefin material has poor weather resistance and cannot have balance between rigidity and bonding property.
The present invention provides aThe weather-resistant self-bonding polyolefin material comprises the following components in parts by weight:
the melt index of the polypropylene is 1.2-5g/10min under the conditions of 230 ℃ and 2.16kg, and the test standard of the melt index is GBT 3682.1-2018;
the compatilizer is polypropylene grafted maleic anhydride, the melt index of the polypropylene grafted maleic anhydride at 230 ℃ and 2.16kg is 6-10g/10min, and the test standard of the melt index is GBT 3682.1-2018.
Preferably, the polyolefin material component comprises the following components in parts by weight:
preferably, the grafting rate of the polypropylene grafted maleic anhydride is 0.5-0.8%, and the residual rate of the maleic anhydride monomer is 0.15-0.35%. The test method of the grafting rate and the residual rate of the maleic anhydride monomer is to determine by an acid-base titration method: first, purification of the graft was carried out: weighing about 4g of graft, adding the graft and 200ml of dimethylbenzene into a 250ml distillation flask, heating and dissolving, refluxing for 8-10h, cooling, adding acetone, shaking up, standing for precipitation, filtering, washing with acetone, drying the filtrate in a 90 ℃ oven for 10h, and cooling for later use. Grafting ratio: weighing 2G of refined graft, placing the refined graft in a 250ml distillation flask, adding about 80ml of xylene, heating and refluxing for about 20min until the graft is dissolved, adding excessive 0.1mol/l of KOH-ethanol standard solution after cooling, heating and refluxing for 6h, taking phenolphthalein as an indicator after cooling, back-dripping excessive KOH-ethanol standard solution by using 0.1mol/l of HCl-isopropanol standard solution, recording the amount of alkali consumed by excessive amount and the amount of acid neutralized, and calculating a grafting rate G (MAH) =9.806 (V1C 1-C2V 2)/2 m according to the company, wherein G (MAH) is the MAH mass fraction% on 1G of PP graft; c1 is the concentration of KOH-ethanol standard solution, mol/l; c2 is the concentration of HCl-isopropanol standard solution, mol/l; v1 is the volume of the standard solution added with excessive KOH-ethanol, and is ml; v2 is the volume of HCl-isopropanol standard solution consumed by back titration to neutralize alkali, ml; m is the graft refined sample mass, g. Residual rate of monomer: according to the formula X = (G total-G essence)/G total 100%, wherein X is monomer residual rate,%; g is always the graft ratio,%, measured for the graft without refining; g fine is the grafting ratio,%, measured for the refined graft.
Preferably, the glass fibers are chopped alkali glass fibers.
Preferably, the diameter of the chopped alkali glass fibers is 12-15 μm. The diameter of the glass fiber in the polyolefin material is the same as that of the raw material glass fiber, the micron-grade glass fiber is very small, the length of the glass fiber can be only shortened under the shearing of a screw rod, and the diameter cannot be changed.
Preferably, the tackifying resin comprises one or more of polyolefin elastomer POE, ethylene-vinyl acetate copolymer EVA, ethylene-acrylic acid copolymer EAA, SEBS and C5 petroleum resin.
Preferably, the polyolefin elastomer POE has a melt index of 1-13g/10min at 190 ℃ and 2.16kg, and the test standard of the melt index is GBT 3682.1-2018. The polyolefin elastomer POE reduces the surface energy, increases the infiltration effect of the material, and improves the bonding strength.
Preferably, the antioxidant is a main antioxidant and an auxiliary antioxidant, wherein the main antioxidant is a hindered phenol antioxidant, and the auxiliary antioxidant is a phosphite antioxidant and/or a thioester antioxidant.
Preferably, the weight ratio of the primary antioxidant to the secondary antioxidant is 1.5.
Preferably, the weather resisting agent comprises one or more of hydroxybenzophenone light stabilizer, hydroxybenzotriazole light stabilizer and hindered amine light stabilizer.
Preferably, the inorganic filler comprises one or more of calcium carbonate, talcum powder, kaolin, barium sulfate and glass beads.
The carbon black masterbatch described above can be obtained commercially, for example, under the designations PE2718, UN 2005, plasback PE2772, plasback PE6251, and can be prepared by reference to the prior art. In the invention, no matter the carbon black master batches with different grades are purchased in the market or the self-made carbon black master batches have little influence on the technical effect of the invention.
Preferably, the polyolefin material also comprises 0-12 parts of other auxiliary agents.
Preferably, the other auxiliary agents comprise one or more of silane coupling agents and lubricating agents.
Preferably, the weight portion of the silane coupling agent is 0.5-8 portions.
Preferably, the silane coupling agent comprises one or more of vinyltriethoxysilane, vinyltris (beta-methoxyethoxy) silane, and N-beta- (aminoethyl) -gamma-aminopropyltrimethoxysilane.
Preferably, the lubricant is 0.5-2 parts by weight.
Preferably, the lubricant comprises one or more of PE wax, polycarbonate and silicone.
The invention also provides a preparation method of the weather-resistant self-bonding polyolefin material, which comprises the following steps:
mixing the components, extruding the obtained mixture by a double-screw extruder and granulating to obtain the weather-resistant self-bonding polyolefin material.
Preferably, the temperature of each zone of the double-screw extruder is 180-240 ℃, and the length-diameter ratio of the double screws is 48:1-55:1.
the invention also provides the application of the weather-resistant self-bonding polyolefin material in heat insulation parts, such as warm edge spacer bars.
The melt indexes of the polypropylene and the polypropylene grafted maleic anhydride adopted by the invention are different, the free energy of molecular diffusion is different, and the melt indexes of the polypropylene and the polypropylene grafted maleic anhydride are in a specific range, so that the polypropylene grafted maleic anhydride is preferentially diffused to a metal surface for infiltration, carbonyl groups and hydroxyl groups on the metal surface are combined into ester bonds, the bonding strength is improved by the chemical bonding effect, the hydrolysis effect in the water boiling process can be better resisted by the firm chemical bonding effect, the water boiling resistant effect of bonding is improved, and the bonding strength retention rate after water boiling is improved.
Advantageous effects
According to the invention, polypropylene with a specific melt index and polypropylene-grafted maleic anhydride are adopted to improve the bonding strength and weather resistance of the material, and the addition of tackifying resin can further improve the bonding strength and weather resistance of the material, but the rigidity of the material is not enough, and the addition of glass fiber can improve the rigidity of the material, so that the bonding strength and the rigidity of the material are balanced, and the addition of the components can ensure that the material has better toughness.
The polyolefin material has the bonding strength of 64-79N/cm, the bonding strength retention rate of more than or equal to 67 percent and the notch impact strength of 13-20J/cm 2 The flexural modulus is 1521-1880MPa.
Detailed Description
The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention can be made by those skilled in the art after reading the teaching of the present invention, and these equivalents also fall within the scope of the claims appended to the present application.
And (3) reagent sources:
polypropylene 1: melt index 1.2g/10min at 230 ℃ under 2.16kg, PP HP1850, available from Lyondelbasell;
polypropylene 2: the melt index is 3g/10min under the conditions of 230 ℃ and 2.16kg, and PP L5E89 is purchased from Chinese petroleum;
polypropylene 3: the melt index is 0.5g/10min under the conditions of 230 ℃ and 2.16kg, PP B8101 is purchased from China petrochemical;
polypropylene 4: the melt index is 7.6g/10min PP TF 1007 under the conditions of 230 ℃ and 2.16kg, and the PP TF is purchased from China petrochemical;
polypropylene grafted maleic anhydride 1: the melt index is 8.1g/10min under the conditions of 190 ℃ and 2.16kg, the grafting rate is 0.56 percent, the residual rate of the maleic anhydride monomer is 0.21 percent, and the preparation method comprises the following steps: dissolving 2 parts by weight of maleic anhydride, 0.3 part by weight of dicumyl peroxide and 0.2 part by weight of trimethylolpropane triacrylate (TMPTA) in 40 parts by weight of acetone or butanone to prepare a mixture solution, mixing 100 parts by weight of polypropylene (brand: FC709M, purchased from medium petroleum) particles and the mixture solution in a high-speed mixing pot for 3 minutes, adding the mixture solution into a double-screw extruder for reaction, extrusion and granulation, and drying to obtain the polypropylene/methyl methacrylate composite material, wherein the extrusion temperature is 170 ℃; polypropylene grafted maleic anhydride 2: the melt index is 10g/10min under the conditions of 190 ℃ and 2.16kg, the grafting rate is 0.62 percent, the residual rate of the maleic anhydride monomer is 0.25 percent, and the preparation method comprises the following steps: in parts by weight, 2 parts of maleic anhydride, 0.3 part of di-t-butylperoxydiisopropylbenzene (dtrp), and 0.3 part of trimethylolpropane triacrylate (TMPTA) were dissolved in 40 parts of acetone or methyl ethyl ketone to prepare a mixture solution, and 100 parts of polypropylene (brand: PP HP500P purchased from medium petroleum) particles and the mixed solution are mixed for 3 minutes in a high mixing kettle, added into a double-screw extruder for reaction, extruded and granulated, and dried to obtain the PP HP500P composite material, wherein the extrusion temperature is 190 ℃;
polypropylene grafted maleic anhydride 3: the melt index is 9.5g/10min under the conditions of 190 ℃ and 2.16kg, the grafting rate is 0.45 percent, the residual rate of the maleic anhydride monomer is 0.12 percent, and the preparation method comprises the following steps: in parts by weight, 2 parts of maleic anhydride, 0.3 part of di-t-butylperoxydiisopropylbenzene and 0.3 part of triallyl isocyanurate (TAIC) were dissolved in 40 parts of acetone or methyl ethyl ketone to prepare a mixture solution, and 100 parts of polypropylene (brand: PP 902008GR SM (from SM PLASTICS) particles and the mixed solution are mixed in a high-speed mixing pot for 3 minutes, added into a double-screw extruder for reaction, extrusion and granulation, and dried to obtain the high-temperature-resistant polypropylene (PP 902008GR SM) powder, wherein the extrusion temperature is 190 ℃;
polypropylene grafted maleic anhydride 4: the melt index is 9.8g/10min under the conditions of 190 ℃ and 2.16kg, the grafting rate is 0.85 percent, the residual rate of the maleic anhydride monomer is 0.45 percent, and the preparation method comprises the following steps: dissolving 4 parts by weight of maleic anhydride, 0.5 part by weight of diisopropylbenzene peroxide and 0.5 part by weight of trimethylolpropane triacrylate (TMPTA) in 80 parts by weight of acetone or butanone to prepare a mixture solution, putting 10 parts by weight of SEBS into a stirring tank for stirring, spraying the mixed solution in the stirring process until the mixture solution is completely and uniformly absorbed by the SEBS, mixing the SEBS, 90 parts by weight of polypropylene (brand: HP2106N, purchased from OQ plastic L.L.C) particles and the mixed solution in a high-mixing pot for 5 minutes, adding a double-screw extruder for reaction, extruding and granulating, and drying to obtain the polypropylene composite material, wherein the extrusion temperature is 190 ℃;
polypropylene grafted maleic anhydride 5: the melt index is 5g/10min under the conditions of 190 ℃ and 2.16kg, the grafting rate is 0.65 percent, the residual rate of the maleic anhydride monomer is 0.51 percent, and the preparation method comprises the following steps: dissolving 3 parts by weight of maleic anhydride, 0.3 part of di-tert-butylperoxy diisopropylbenzene and 0.3 part of trimethylolpropane triacrylate (TMPTA) in 60 parts of acetone or butanone to prepare a mixture solution, putting 10 parts of SEBS into a stirring tank for stirring, spraying the mixed solution in the stirring process until the mixture solution is completely and uniformly absorbed by the SEBS, mixing the SEBS, 90 parts of polypropylene (brand: PP HP500P, purchased from medium petroleum) particles and the mixed solution in a high-mixing pot for 5 minutes, adding a double-screw extruder for reaction, extruding and granulating, and drying to obtain the polypropylene modified polystyrene (SEBS) with the extrusion temperature of 190 ℃;
polypropylene grafted maleic anhydride 6: the melt index is 12g/10min under the conditions of 190 ℃ and 2.16kg, the grafting rate is 0.65 percent, the residual rate of the maleic anhydride monomer is 0.49 percent, and the preparation method comprises the following steps: dissolving 3 parts by weight of maleic anhydride, 0.4 part of di-tert-butylperoxy diisopropylbenzene and 0.4 part of trimethylolpropane triacrylate (TMPTA) in 60 parts of acetone or butanone to prepare a mixture solution, putting 15 parts of SEBS into a stirring tank for stirring, spraying the mixture solution in the stirring process until the mixture solution is completely and uniformly absorbed by the SEBS, mixing the SEBS, 85 parts of polypropylene (brand: M30-GD, purchased from SK GLOBAL CHEMICAL) particles and the mixture solution in a high-mixing pot for 5 minutes, adding a double-screw extruder for reaction, extrusion and granulation, and drying to obtain the product, wherein the extrusion temperature is 190 ℃;
SEBS: kraton G1645 VO, available from kraton polymer trade;
glass fiber 1: chopped alkali glass fibers, 13 μm in diameter, 508S, available from Megashi, inc., china;
glass fiber 2: chopped alkali glass fiber, diameter 10 μm,584YF, available from boulder gmbh, china;
glass fiber 3: short-cut alkali glass fiber with diameter of 17 μm,910A, purchased from Megashi, inc., china;
tackifying resin 1: polyolefin elastomer POE with a melt index of 1g/10min at 190 ℃ under 2.16kg, available from DOW as POE 8842;
tackifying resin 2: polyolefin elastomer POE with a melt index of 13g/10min at 190 ℃ under 2.16kg, POE8137, available from DOW;
tackifying resin 3: polyolefin elastomer POE having a melt index of 0.54g/10min at 190 ℃ under the condition of 2.16kg, POE9071 available from Exxon Mobil;
tackifying resin 4: polyolefin elastomer POE with a melt index of 15g/10min at 190 ℃ and 2.16kg, POE11527 available from DOW;
tackifying resin 5: SEBS, SEEPS 4055, available from Kyork Kaixiang chemical Co., ltd;
tackifying resin 6: c5 Petroleum resin, YH-1288, available from Ningbo Yonghua resins Ltd;
antioxidant 1: hindered phenol antioxidants, antioxidant 1076, available from basf (china) ltd;
and (2) antioxidant: phosphite antioxidants, tris (2, 4-di-tert-butylphenyl) phosphite, available from basf (china) ltd;
and (3) antioxidant: thioester antioxidants, DSTDP, available from Santa Clarke, inc.;
weather resistant agent 1: hydroxybenzophenone light stabilizers, UV 531, available from Tianjin Lianlong New materials GmbH;
weather resisting agent 2: a hydroxybenzotriazole light stabilizer, UV-770DF, available from Tianjin Lianlong New materials GmbH;
inorganic filler: calcium carbonate, TD-A23, available from Mount Foster chemical Co., ltd;
carbon black master batch: PE2718, available from Xinghui trade, inc., guangzhou;
other auxiliary agents:
lubricant: PE waxes, CS-12N, commercially available;
unless otherwise specified, some of the components (e.g., lubricants) in the parallel examples and comparative examples of the present invention are the same commercial products.
The preparation method of the polyolefin material comprises the following steps: according to the mixture ratio of tables 1, 2 and 3, the polypropylene grafted maleic anhydride, the tackifying resin, the lubricant, the inorganic filler and the carbon black master batch are put into a high-speed mixer to be uniformly mixed at the rotating speed of 2000-3000rpm, then the glass fiber is added to be uniformly mixed at the rotating speed of 2000rpm for 2min, finally the mixed material, the antioxidant, the weather-resistant agent and the deodorant are uniformly mixed at the rotating speed of 1000rpm in the high-speed mixer, and finally the mixture is extruded and granulated by a double-screw extruder, wherein the temperature of each area of the double-screw extruder is 180-240 ℃, and the length-diameter ratio (L/D) of the double-screw extruder is 48:1.
and (4) performance testing:
(1) Bonding strength: the assay was carried out according to the assay method of GB/T8808-1998;
(2) Weather resistance: after the polyolefin material is subjected to bonding strength testing according to the standard, after the polyolefin material is boiled in water at 85 ℃ for 480 hours, the bonding strength is tested according to the standard, and the bonding strength retention rate is calculated, wherein the bonding strength retention rate = bonding strength after boiling/bonding strength before boiling x 100%;
(3) Notched impact strength: measuring according to the measuring method of GB/T1843-2008;
(4) Flexural modulus: the measurement was carried out according to the method of GB/T9341-2000.
TABLE 1 examples 1-12 proportions (parts by weight)
TABLE 2 examples 13-19 proportions (parts by weight)
TABLE 3 comparative example proportions (parts by weight)
As can be seen from tables 1-3, the polyolefin material of the present invention has good adhesive strength, rigidity, toughness and weather resistance. The melt index of polypropylene in comparative examples 1 and 2 is out of the range of the present invention, the melt index of polypropylene grafted maleic anhydride in comparative examples 3 and 4 is out of the range of the present invention, and the materials of comparative examples 1 to 4 are inferior in adhesive strength, adhesive strength retention, notched impact strength, flexural modulus to example 1. Comparative example 5, in which no tackifier resin was added, was inferior to example 1 in the adhesive strength, adhesive strength retention ratio, notched impact strength and flexural modulus of the material of comparative example 5. Comparative example 6 added the compatibilizer SEBS, and the material thereof was inferior to example 1 in terms of adhesive strength, adhesive strength retention, flexural modulus, and notched impact strength. Therefore, the polypropylene with specific melt index and the polypropylene grafted maleic anhydride are adopted, the bonding strength and the weather resistance of the material are improved, the addition of the tackifying resin can further improve the bonding strength and the weather resistance of the material, the addition of the glass fiber can improve the rigidity of the material, and therefore the bonding strength and the rigidity of the material are balanced, and the addition of the components can ensure that the material has better toughness.
Claims (10)
1. The weather-resistant self-bonding polyolefin material is characterized by comprising the following components in parts by weight:
the melt index of the polypropylene is 1.2-5g/10min at 230 ℃ and 2.16 kg;
the compatilizer is polypropylene grafted maleic anhydride, and the melt index of the polypropylene grafted maleic anhydride is 6-10g/10min at 230 ℃ and under the condition of 2.16 kg.
2. The polyolefin material of claim 1, wherein the polyolefin material components comprise, in parts by weight:
3. the polyolefin material according to claim 1, wherein the grafting ratio of the polypropylene grafted with maleic anhydride is 0.5-0.8%, and the residual ratio of the maleic anhydride monomer is 0.15-0.35%; the glass fiber is chopped alkali glass fiber, and the diameter of the chopped alkali glass fiber is 12-15 mu m.
4. The polyolefin material of claim 1, wherein the tackifying resin comprises one or more of polyolefin elastomer POE, ethylene-vinyl acetate copolymer EVA, ethylene-acrylic acid copolymer EAA, SEBS and C5 petroleum resin.
5. Polyolefin material according to claim 4, wherein the polyolefin elastomer POE has a melt index of 1-13g/10min at 190 ℃ and 2.16 kg.
6. The polyolefin material of claim 1, wherein the antioxidant is a primary antioxidant and a secondary antioxidant, wherein the primary antioxidant is a hindered phenol antioxidant and the secondary antioxidant is a phosphite antioxidant and/or a thioester antioxidant; the weather-resistant agent comprises one or more of hydroxybenzophenone light stabilizer, hydroxybenzotriazole light stabilizer and hindered amine light stabilizer; the inorganic filler comprises one or more of calcium carbonate, talcum powder, kaolin, barium sulfate and glass beads.
7. The polyolefin material of claim 1, further comprising 0-12 parts of other additives; the other auxiliary agents comprise one or more of silane coupling agents and lubricants.
8. A process for the preparation of a polyolefin material according to any of claims 1 to 7, comprising:
and mixing the components, extruding the obtained mixture by a double-screw extruder, and granulating to obtain the weather-resistant self-bonding polyolefin material.
9. The method of claim 8, wherein the temperature of each zone of the twin-screw extruder is 180-240 ℃, and the length-diameter ratio of the twin-screw is 48:1-55:1.
10. use of a polyolefin material according to any of claims 1 to 7 in insulation parts.
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