CN104829944A - Novel modified polypropylene composite material and preparation method thereof - Google Patents

Novel modified polypropylene composite material and preparation method thereof Download PDF

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Publication number
CN104829944A
CN104829944A CN201510263958.4A CN201510263958A CN104829944A CN 104829944 A CN104829944 A CN 104829944A CN 201510263958 A CN201510263958 A CN 201510263958A CN 104829944 A CN104829944 A CN 104829944A
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China
Prior art keywords
sic
composite material
whisker
polypropylene composite
preparation
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CN201510263958.4A
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Chinese (zh)
Inventor
袁正凯
皮正亮
王�琦
葛嘉宝
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GUANGDONG WAYLAM ENGINEERING PLASTICS Co Ltd
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GUANGDONG WAYLAM ENGINEERING PLASTICS Co Ltd
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Priority to CN201510263958.4A priority Critical patent/CN104829944A/en
Publication of CN104829944A publication Critical patent/CN104829944A/en
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/10—Homopolymers or copolymers of propene
    • C08L23/12—Polypropene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
    • B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/92—Measuring, controlling or regulating
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
    • C08G69/02—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids
    • C08G69/08—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids derived from amino-carboxylic acids
    • C08G69/12—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids derived from amino-carboxylic acids with both amino and carboxylic groups aromatically bound
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
    • C08K13/06—Pretreated ingredients and ingredients covered by the main groups C08K3/00 - C08K7/00
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/34—Silicon-containing compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K7/00—Use of ingredients characterised by shape
    • C08K7/02—Fibres or whiskers
    • C08K7/04—Fibres or whiskers inorganic
    • C08K7/14—Glass
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K9/00—Use of pretreated ingredients
    • C08K9/04—Ingredients treated with organic substances
    • C08K9/06—Ingredients treated with organic substances with silicon-containing compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/10—Homopolymers or copolymers of propene
    • C08L23/14—Copolymers of propene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L51/00—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
    • C08L51/06—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond

Abstract

The invention discloses a novel modified polypropylene composite material and a preparation method thereof. The preparation method comprises the following steps: 1) performing surface modification on a nanometer SiC whisker, and grafting hyperbranched aromatic polyamide onto the surface of the nanometer SiC whisker by a three-step method, including the three stages of hydroxylation (SiC-OH), silanization (SiC-APS) and hyperbranching (SiC-HBP) of silicon carbide whisker; 2) adding different amounts of SiC-HBP whiskers into a polypropylene matrix to prepare the novel modified polypropylene composite material which comprises the following components in percentage by weight: 40-80 percent of homo-polypropylen or co-polypropylene, 5-20 percent of SiC-HBP whiskers, 5-15 percent of alkali-free glass fiber yarns, 0-5 percent of grafted PP, 5-10 percent of barium sulfate, 0.1-0.5 percent of a main anti-oxidant, 0.1-0.5 percent of an auxiliary anti-oxidant and 0.1-1 percent of other additives; and 3) adding the components in percentage by weight into a high-speed mixer, mixing the components uniformly, conveying the mixture into a double-screw extruder, and performing extrusion, melting and granulation to obtain the novel polypropylene composite material modified by hyperbranched silicon carbide whisker.

Description

A kind of preparation method of new modified polypropylene composite material
Technical field:
The present invention relates to modified polypropylene composite material technical field, be specifically related to a kind of new modified polypropylene composite material and preparation method thereof.
Background technology:
Polypropylene (PP) is a kind of crystalline polymer of compound with regular structure, as one of three large general-purpose plastics, it has the premium propertiess such as resistance to chemical attack, tasteless nontoxic, low, the easy processing of light weight, production cost and electrical insulating property be good, thus has a wide range of applications in automotive industry, household electrical appliance, electronics, packaging, building materials and furniture etc.But because physical strength is low, cold-resistant poor heat resistance, the defect such as shrinking percentage is large, creep resistance is poor and limit its application as structured material aspect, can not as high performance engineering plastics.Therefore, carry out modification to polypropylene, making it through engineering approaches just becomes an important research topic.Many in Recent study with nano-particles filled blended and modified polypropylene, the performances such as its crystal property to polypropylene composite material, resistance to deterioration and toughen and intensify have improvement to a certain degree.
At present, existingly much to report about the literature research of nano-particles filled blended and modified polypropylene matrix material.In optional blended filler, nano SiC whisker due to have cheap, hot strength is large, oxidation-resistance is strong, wearability is good and thermal expansivity is little, and the good characteristic such as good electrical insulation capability and being used widely.But the whisker granularity that nano SiC is little makes its surface energy higher, thus have impact on the actual filling dispersion effect of nano SiC whisker owing to very easily reuniting.So select nano SiC whisker to carry out chemical modification as needing during blended filler to its surface, the agglomeration power between whisker particle is reduced with the surface energy reducing SiC whisker, improve its dispersing uniformity in polypropylene matrix, reduction two-phase interface tension force improves wettability, consistency and bonding force between nano SiC whisker and matrix resin, thus improves the over-all properties of polypropylene composite material.First nano SiC whisker is carried out surface organic modification herein, Hyperbranched Aromatic Polyamides is grafted to nano SiC whisker surface, and then add the SiC-HBP whisker of different content and PP matrix extrudes melt blending, prepare a kind of new modified polypropylene composite material.
Summary of the invention:
In order to overcome the shortcoming of prior art with not enough, the object of the present invention is to provide the technical scheme of a kind of new modified polypropylene composite material and preparation method thereof.This matrix material, on the basis significantly improving polypropylene composite material impelling strength, also obviously improves its strength and stiffness, also promotes to some extent processing flowability.
For achieving the above object, technical scheme of the present invention is as follows:
1. a preparation method for new modified polypropylene composite material, is characterized in that, comprises and carries out surface graft modification to nano SiC whisker, by three-step approach, Hyperbranched Aromatic Polyamides is grafted to nano SiC whisker surface:
First, be that the hydrogen peroxide of 30wt% carries out hydroxylation (SiC-OH) to silicon carbide whisker by concentration;
Next, using dimethylbenzene as solvent, obtained silanization silicon carbide whisker (SiC-APS) under silane coupling agent effect;
Next, silanization silicon carbide whisker and 3,5-diaminobenzoic acid are reacted obtained Hyperbranched Aromatic Polyamides grafting silicon carbide whisker (SiC-HBP) with same ratio in N-Methyl pyrrolidone;
Finally, to be placed in the baking oven of 100 DEG C vacuum-drying to constant weight to remove solvent, after drying, grinding is for subsequent use.
The SiC-HBP whisker adding different content prepares novel modified polypropylene composite material in PP matrix, the each weight percentages of components of this matrix material is: homopolymerization or Co-polypropylene 40-80wt%, SiC-HBP whisker 5-20wt%, alkali-free glass fiber yarn 5-15wt%, graft PP 0-5wt%, barium sulfate 5-10wt%, primary antioxidant 0.1-0.5wt%, auxiliary antioxidant 0.1-0.5wt%, other auxiliary agents 0.1-1wt%.
Add high speed mixer batch mixing evenly by the material of above-mentioned weight percent, mixture is sent into twin screw extruder, extrudes melt pelletization, obtain the polypropylene composite materials of hyperbranched silicon carbide whisker modification.
The preparation method of described a kind of new modified polypropylene composite material, is characterized in that, described polypropylene comprises one or more in the high crystallization homo-polypropylene of different mobility or block copolymerization polypropylene, and interpolation massfraction is 40-80%.
The preparation method of described a kind of new modified polypropylene composite material, is characterized in that, the mass percent of described SiC-HBP whisker is 5-20%, and preferred percent is 20wt%.
Compared with prior art, the invention has the advantages that: through modified surface energy and the surface polarity that can reduce SiC whisker particle of Hyperbranched Aromatic Polyamides, and the degree of scatter of carborundum particle in PP matrix can be improved and reduce agglomeration; Reduction two-phase interface tension force improves wettability, consistency and bonding force between nano SiC whisker and matrix resin, thus improves the physical strength of polypropylene composite material.On the other hand, must with polypropene blended with this hyperbranched modified carbonize silicon wafer, make the absorption polypropylene molecular chain that hyperbranched layer can be very strong, become the nucleus needed for crystalling propylene, serve the effect of heterogeneous nucleation, show as the raising of Tc.Improved mechanical property and the glossiness of material further by filling alkali-free glass fiber yarn and barium sulfate simultaneously; The multiple oxidation inhibitor added ensure that the life-span of material, avoids aging.
Embodiment:
Below in conjunction with specific embodiment, further detailed description is done to the present invention, but the invention is not restricted to these embodiments, comprise the following steps:
Surface graft modification is carried out to nano SiC whisker, by three-step approach, Hyperbranched Aromatic Polyamides is grafted to nano SiC whisker surface: the hydroxylation (SiC-OH) of silicon carbide whisker, silanization (SiC-APS) and hyperbranched (SiC-HBP).First we are that the hydrogen peroxide of 30wt% carries out hydroxylation (SiC-OH) to silicon carbide whisker by concentration, then using dimethylbenzene as solvent, obtained silanization silicon carbide whisker (SiC-APS) under silane coupling agent effect, next step is by silanization silicon carbide whisker and 3,5-diaminobenzoic acid reacts obtained Hyperbranched Aromatic Polyamides grafting silicon carbide whisker (SiC-HBP) with same ratio in N-Methyl pyrrolidone, finally to be placed in the baking oven of 100 DEG C vacuum-drying to constant weight to remove solvent, after drying, grinding is for subsequent use.
The SiC-HBP whisker adding different content prepares novel modified polypropylene composite material in PP matrix, the each weight percentages of components of this matrix material is: homopolymerization or Co-polypropylene 40-80wt%, SiC-HBP whisker 5-20wt%, alkali-free glass fiber yarn 5-15wt%, graft PP 0-5wt%, barium sulfate 5-10wt%, primary antioxidant 0.1-0.5wt%, auxiliary antioxidant 0.1-0.5wt%, other auxiliary agents 0.1-1wt%.
Add high speed mixer batch mixing evenly by the material of above-mentioned weight percent, mixture is sent into twin screw extruder, extrudes melt pelletization, obtain the polypropylene composite materials of hyperbranched silicon carbide whisker modification.
Embodiment 1:
Each weight percentages of components is: homopolymerization or Co-polypropylene 70wt%, SiC-HBP whisker 0wt%, alkali-free glass fiber yarn 15wt%, graft PP 5wt%, barium sulfate 10wt%, primary antioxidant 0.15wt%, auxiliary antioxidant 0.3wt%, other auxiliary agents 0.3wt%; Add high speed mixer by the material of above-mentioned weight percent to mix; Mixing material enters forcing machine, is that 180 ~ 230 DEG C of twin screw extruders are extruded through melt temperature, through cooling, pelletizing, sieves, is packaged to be unmodified polypropylene composite material 1.
Embodiment 2:
Each weight percentages of components is: homopolymerization or Co-polypropylene 70wt%, SiC-HBP whisker 5wt%, alkali-free glass fiber yarn 15wt%, graft PP 5wt%, barium sulfate 10wt%, primary antioxidant 0.15wt%, auxiliary antioxidant 0.3wt%, other auxiliary agents 0.3wt%; Add high speed mixer by the material of above-mentioned weight percent to mix; Mixing material enters forcing machine, is that 180 ~ 230 DEG C of twin screw extruders are extruded, through the polypropylene composite material 2 of cooling, pelletizing, modification of sieving, be packaged to be through melt temperature.
Embodiment 3:
Each weight percentages of components is: homopolymerization or Co-polypropylene 70wt%, SiC-HBP whisker 10wt%, alkali-free glass fiber yarn 15wt%, graft PP 5wt%, barium sulfate 10wt%, primary antioxidant 0.15wt%, auxiliary antioxidant 0.3wt%, other auxiliary agents 0.3wt%; Add high speed mixer by the material of above-mentioned weight percent to mix; Mixing material enters forcing machine, is that 180 ~ 230 DEG C of twin screw extruders are extruded, through the polypropylene composite material 3 of cooling, pelletizing, modification of sieving, be packaged to be through melt temperature.
Embodiment 4:
Each weight percentages of components is: homopolymerization or Co-polypropylene 70wt%, SiC-HBP whisker 20wt%, alkali-free glass fiber yarn 15wt%, graft PP 5wt%, barium sulfate 10wt%, primary antioxidant 0.15wt%, auxiliary antioxidant 0.3wt%, other auxiliary agents 0.3wt%; Add high speed mixer by the material of above-mentioned weight percent to mix; Mixing material enters forcing machine, is that 180 ~ 230 DEG C of twin screw extruders are extruded, through the polypropylene composite material 4 of cooling, pelletizing, modification of sieving, be packaged to be through melt temperature.
Following table 1 determines embodiment 1 adds the modified polypropylene composite material of different SiC-HBP Whisker Content Mechanical Data to embodiment 4 respectively:
Table 1 embodiment correlation data
By testing discovery above, the modified polypropylene composite material after blending SiC-HBP whisker has better mechanical property than the polypropylene composite material not adding SiC-HBP whisker.
Above embodiments of the invention are described in detail; but described content is only for illustrating technical conceive of the present invention and feature; its object is to person skilled in the art can be understood content of the present invention and implement according to this, can not limit the scope of the invention with this.All equalizations done according to the present patent application scope change and improve, and all should still belong within patent covering scope of the present invention.

Claims (7)

1. a preparation method for new modified polypropylene composite material, is characterized in that, comprises and carries out surface graft modification to nano SiC whisker, by three-step approach, Hyperbranched Aromatic Polyamides is grafted to nano SiC whisker surface:
First, be that the hydrogen peroxide of 30wt% carries out hydroxylation (SiC-OH) to silicon carbide whisker by concentration;
Next, using dimethylbenzene as solvent, obtained silanization silicon carbide whisker (SiC-APS) under silane coupling agent effect;
Next, silanization silicon carbide whisker and 3,5-diaminobenzoic acid are reacted obtained Hyperbranched Aromatic Polyamides grafting silicon carbide whisker (SiC-HBP) with same ratio in N-Methyl pyrrolidone;
Finally, to be placed in the baking oven of 100 DEG C vacuum-drying to constant weight to remove solvent, after drying, grinding is for subsequent use.
2. the preparation method of new modified polypropylene composite material according to claim 1, it is characterized in that, the component of this matrix material and massfraction are: homopolymerization or Co-polypropylene 40-80wt%, SiC-HBP whisker 5-20wt%, alkali-free glass fiber yarn 5-15wt%, graft PP 0-5wt%, barium sulfate 5-10wt%, primary antioxidant 0.1-0.5wt%, auxiliary antioxidant 0.1-0.5wt%, other auxiliary agents 0.1-1wt%.
3. the preparation method of new modified polypropylene composite material according to claim 2, it is characterized in that, high speed mixer batch mixing is added even by the material of above-mentioned weight percent, mixture is sent into twin screw extruder, extrude melt pelletization, obtain the polypropylene composite materials of hyperbranched silicon carbide whisker modification.
4. the preparation method of new modified polypropylene composite material according to claim 3, it is characterized in that, described polypropylene comprises one or more in the high crystallization homo-polypropylene of different mobility or block copolymerization polypropylene, and interpolation massfraction is 40-80%.
5. the preparation method of new modified polypropylene composite material according to claim 4, is characterized in that, the mass percent of described SiC-HBP whisker is 5-20%.
6. the preparation method of new modified polypropylene composite material according to claim 2, is characterized in that, the melt temperature in twin screw extruder is 180 ~ 230 DEG C.
7. the preparation method of new modified polypropylene composite material according to claim 6, is characterized in that, through the polypropylene composite material of cooling, pelletizing, described modification of sieving, be packaged to be.
CN201510263958.4A 2015-05-21 2015-05-21 Novel modified polypropylene composite material and preparation method thereof Pending CN104829944A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105462069A (en) * 2015-12-25 2016-04-06 广东威林工程塑料有限公司 Functionalized boron nitride nanosheet/polypropylene composite material and preparation method thereof
CN115895120A (en) * 2022-12-30 2023-04-04 河南国网电缆集团有限公司 High-wear-resistance thermoplastic elastomer sheath material and preparation method and application thereof
CN115895120B (en) * 2022-12-30 2024-04-26 河南国网电缆集团有限公司 High-wear-resistance thermoplastic elastomer sheath material and preparation method and application thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105462069A (en) * 2015-12-25 2016-04-06 广东威林工程塑料有限公司 Functionalized boron nitride nanosheet/polypropylene composite material and preparation method thereof
CN115895120A (en) * 2022-12-30 2023-04-04 河南国网电缆集团有限公司 High-wear-resistance thermoplastic elastomer sheath material and preparation method and application thereof
CN115895120B (en) * 2022-12-30 2024-04-26 河南国网电缆集团有限公司 High-wear-resistance thermoplastic elastomer sheath material and preparation method and application thereof

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Application publication date: 20150812