Novel polypropylene composite

A technology of composite materials and polypropylene, which is applied in the field of polymer composite materials, can solve the problems of poor mixing of materials, poor interfacial wetting and adhesion, and inability to obtain composite materials with comprehensive properties, so as to reduce the use and reduce the The effect of consumption, good compatibility

Inactive Publication Date: 2012-07-25
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, lignin compounds generally have strong water absorption, while thermoplastic polypropylene is mostly non-polar and hydrophobic, which makes the interface between two different polarities extremely poor in wetting and adhesion, resulting in material In the process of processing, it cannot be mixed well, and composite materials with superior comprehensive properties cannot be obtained.

Method used

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  • Novel polypropylene composite
  • Novel polypropylene composite
  • Novel polypropylene composite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: Methacrylic acid modified lignin grafted methyl methacrylate polymer / PP composite material

[0023] Step 1: Put 100g of purified sodium lignosulfonate and 25g of methacrylic acid in a stainless steel airtight tank, mix evenly, place in an oil bath to heat up, react at 160-170°C for 7-10min, and take out the product after cooling , soaked in acetone for 24 hours, washed twice with acetone to remove unreacted methacrylic acid, and dried in an oven at 60°C to obtain methacrylic acid-modified lignin. Weigh 30g of methacrylic acid-modified lignin and 0.5g of dibenzoyl peroxide into a polymerization bottle, and perform vacuum pumping and nitrogen filling operations to remove the air in the bottle. Measure 100ml of ethyl acetate, stir well to dissolve the solid, then add 120ml of methyl methacrylate into the polymerization bottle with a syringe, shake well, and react at 80°C for 3 hours to end the reaction. Finally, pour the polymerization solution into a beaker...

Embodiment 2

[0027] Embodiment 2: Methacrylic acid modified lignin grafted styrene polymer / PP composite material

[0028] Step 1: Put 100g of purified sodium lignosulfonate and 20g of methacrylic acid in a stainless steel sealed tank, mix them evenly, put them in an oil bath to heat up, react at a certain temperature for a certain period of time, take out the product after cooling, and use acetone After soaking for 24 hours, it was washed twice with acetone to remove unreacted methacrylic acid, and dried in an oven at 60°C to obtain methacrylic acid-modified lignin. Weigh 30g of methacrylic acid-modified lignin and 0.5g of dibenzoyl peroxide into a polymerization bottle, and perform vacuum pumping and nitrogen filling operations to remove the air in the bottle. Measure 100ml of ethyl acetate, stir well to dissolve the solid, then add 150ml of styrene into the polymerization bottle with a syringe, shake well, and react at 80°C for 3h to end the reaction. Finally, pour the polymerization so...

Embodiment 3

[0031] Embodiment 3: methacrylic acid modified lignin grafted styrene polymer / PP composite material (add toughening agent POE-g-GMA)

[0032]Step 1: Put 100g of purified sodium lignosulfonate and 20g of methacrylic acid in a sealed stainless steel tank, mix them evenly, put them in an oil bath to heat up, react at a certain temperature for a certain period of time, take out the product after cooling, and use acetone After soaking for 24 hours, it was washed twice with acetone to remove unreacted methacrylic acid, and dried in an oven at 60°C to obtain methacrylic acid-modified lignin. Weigh 30g of methacrylic acid-modified lignin and 0.5g of dibenzoyl peroxide into a polymerization bottle, and perform vacuum pumping and nitrogen filling operations to remove the air in the bottle. Measure 100ml of ethyl acetate, stir well to dissolve the solid, then add 150ml of styrene into the polymerization bottle with a syringe, shake well, react at 80°C for 3h, and then end the reaction. ...

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Abstract

The invention provides a novel polypropylene composite and a preparation method thereof. The novel polypropylene composite comprises the following components in content (weight parts): 40-100 parts of modified xylogen grafting polymers, 100-40 parts of polypropylene, 0-20 parts of flexibilizer and 1-5 parts of lubricant, wherein the modified xylogen grafting polymers is obtained by esterifying double-bond esterifying agent with hydroxy in xylogen and grafting modified xylogen and replacing olefin monomers, and fragility of the novel polypropylene composite is reduced while comprehensive mechanical performance thereof is improved by adding the modified xylogen grafting polymers and the flexibilizer. In the novel polypropylene composite prepared by the preparation method, paper pulp and xylogen of waste side products in paper making industry are used reasonably, usage of polypropylene is reduced effectively, and consumption of oil resources is reduced. Accordingly, the novel polypropylene composite has wider popularization prospect.

Description

technical field [0001] The invention relates to the preparation of a novel polypropylene composite material, in particular to the preparation of a methacrylic acid modified lignin grafted styrene polymer / PP composite material. It belongs to the technical field of polymer composite materials. Background technique [0002] Polypropylene is a thermoplastic resin produced by the polymerization of propylene. There are three configurations: isotactic, atactic and syndiotactic, and industrial products use isotactic as the main component. Polypropylene has a melting temperature of about 174°C and a density of 0.91 g / cm 3 , is the lightest general-purpose plastic. It has the advantages of high strength, high hardness, wear resistance, bending fatigue resistance, heat resistance temperature up to 120 ° C, excellent moisture resistance and chemical resistance, and easy processing and molding. It has become the most common plastic in people's daily life. materials and are key product...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L51/00C08L23/12C08F289/00
Inventor 汪济奎朱旭东周玉丽聂亚楠田孝才吴凯刘延昌郭卫红
Owner EAST CHINA UNIV OF SCI & TECH
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