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A kind of high modulus polypropylene/cage silsesquioxane micro-foaming composite material and preparation method thereof

A technology of silsesquioxane and composite materials, which is applied in the field of high modulus polypropylene/cage silsesquioxane micro-foaming composite materials and its preparation, and can solve the problems of co-foaming and affecting the performance of polypropylene micro-foaming , cell collapse and other problems, to achieve the effect of improving melt strength, improving compatibility and enhancing interface bonding

Active Publication Date: 2020-07-17
ORINKO NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, pure polypropylene is a crystalline polymer. Before reaching the melting temperature, PP is almost fluid. Once it exceeds the melting point, the viscosity drops instantly, making it difficult for the thin and inelastic PP melt film to wrap the air bubbles, resulting in bubbles. Collapsing and foaming seriously affect the performance of polypropylene micro-foaming

Method used

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  • A kind of high modulus polypropylene/cage silsesquioxane micro-foaming composite material and preparation method thereof
  • A kind of high modulus polypropylene/cage silsesquioxane micro-foaming composite material and preparation method thereof
  • A kind of high modulus polypropylene/cage silsesquioxane micro-foaming composite material and preparation method thereof

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[0028] The present invention also provides a preparation method of high modulus polypropylene / cage silsesquioxane micro-foaming composite material, comprising the following steps:

[0029] (1) Stir vinyl cage silsesquioxane, alkyl acrylate and emulsifier evenly under water-containing conditions, then stir at 80-90°C for 1-3 hours, then add the initiator dropwise into the reaction system, And heat and reflux at 80-90°C for 12-36h, then cool to room temperature, and adjust the pH of the solution to 7-8 with alkaline substances, then vacuum-dry, crush and sieve to obtain modified vinyl cage silsesquioxane alkyl;

[0030] (2) After mixing the modified vinyl cage silsesquioxane, polypropylene, antioxidant, lubricant, and additives evenly, they are put into a twin-screw extruder, melt-extruded, and granulated to obtain a polymer Acrylic composite materials;

[0031] (3) The polypropylene composite material and foaming agent are uniformly mixed, then added to an injection molding m...

Embodiment 1

[0038] A high modulus polypropylene / cage silsesquioxane microfoam composite made from:

[0039]

[0040]

[0041] The preparation method of described high modulus polypropylene / cage silsesquioxane micro-foaming composite material is as follows:

[0042] (1) Stir 3 parts by weight of vinyl cage silsesquioxane, 6 parts by weight of lauryl methacrylate and 0.6 part by weight of sodium dodecyl sulfonate in 90.88 parts by weight of deionized water, and then Stir at 80°C for 1h, then add 0.06 parts by weight of ammonium persulfate dropwise to the reaction system, and heat to reflux at 80-90°C for 12h, then cool to room temperature, and neutralize to pH 7 with 5% NaOH solution, then Vacuum-dried at 50°C for 12 hours, and then crushed through a 1000-mesh sieve to obtain modified vinyl cage silsesquioxane;

[0043] (2) Modified vinyl cage silsesquioxane, 57 parts by weight homopolypropylene (HX3800), 40 parts by weight block copolymerized polypropylene (BX3800), 0.1 parts by wei...

Embodiment 2

[0046] A high modulus polypropylene / cage silsesquioxane microfoam composite made from:

[0047]

[0048]

[0049] The preparation method of described high modulus polypropylene / cage silsesquioxane micro-foaming composite material is as follows:

[0050] (1) 5 parts by weight of vinyl cage silsesquioxane, 10 parts by weight of dodecyl methacrylate and 1 part by weight of sodium dodecylbenzenesulfonate are stirred in 83.7 parts by weight of deionized water, and then Stir at 80°C for 3h, then add 0.3 parts by weight of potassium persulfate dropwise to the reaction system, and heat to reflux at 80°C for 24h, then cool to room temperature, and neutralize to pH 7.2 with 5% NaOH solution, then Vacuum drying at 70°C for 12 hours, and then crushed through a 1000-mesh sieve to obtain modified vinyl cage silsesquioxane;

[0051] (2) Modified vinyl cage silsesquioxane, 55 parts by weight homopolypropylene (HX3800), 40 parts by weight random copolymerized polypropylene (R370Y), 0.2 ...

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Abstract

The invention relates to the field of polymer technology, in particular to a high-modulus polypropylene / polyhedral oligomeric silsesquioxane microcellular foaming composite material and a preparationmethod thereof. The high-modulus polypropylene / polyhedral oligomeric silsesquioxane microcellular foaming composite material is prepared from a raw composition, wherein the raw composition is preparedfrom the following components in parts by weight: 92 to 97 parts of polypropylene, 2 to 3.2 parts of foaming agent, 3 to 8 parts of vinyl polyhedral oligomeric silsesquioxane, 6 to 16 parts of alkylester acrylate, 0.6 to 1.6 parts of emulsifying agent, 0.06 to 0.48 part of initiator, 0.2 to 0.4 part of antioxidant, 0.5 to 1 part of lubricating agent and 0 to 2 parts of optional assistant. The polypropylene / polyhedral oligomeric silsesquioxane composite material disclosed by the invention has the characteristics of small cell diameter and superior mechanical property, and has a wide application prospect in the field of automobile weight reduction.

Description

technical field [0001] The invention relates to the technical field of polymers, in particular to a high modulus polypropylene / cage silsesquioxane micro-foaming composite material and a preparation method thereof. Background technique [0002] With the development of automobile technology, automobiles are developing in the direction of energy saving, environmental protection, safety and comfort. Automobile lightweight has become the trend of automobile development in the world. Realizing automobile lightweight is one of the most effective ways to save energy. Lightweight materials are an effective way to achieve lightweight vehicles. Micro-foamed polypropylene is a new type of high-performance composite material, which has the advantages of low density, high specific strength, strong energy absorption capacity, sound insulation and heat insulation, etc. Compared with unfoamed polypropylene, the foamed material not only has low density, It reduces material consumption, saves...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08L53/00C08L51/08C08L23/06C08L23/14C08K5/098C08K5/42C08K5/134C08K5/526C08F283/12C08F220/18
CPCC08F283/124C08J9/0023C08J9/0033C08J9/0061C08J9/04C08J2323/12C08J2423/06C08J2423/14C08J2451/08C08J2453/00C08K5/098C08K5/134C08K5/42C08K5/526C08F220/1818
Inventor 石阳阳周海李飞夏洋李荣群
Owner ORINKO NEW MATERIAL CO LTD
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