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Heat-resistant modified polylactic acid composite material

A composite material and heat-resistant modification technology, which is applied in the field of polylactic acid composite materials, can solve problems such as impact strength degradation, affecting material degradation performance, and product molding efficiency limitations, achieving the effect of improving heat resistance and expanding applications

Inactive Publication Date: 2020-02-18
湖南省菱越新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although filling and blending can improve the heat resistance of composite materials to a certain extent, the content of fillers in the filling and blending process is usually high, and the characteristics and nature of composite materials will change greatly, and even affect the degradation of materials. performance
By adding a very small amount of nucleating agent, the crystallization properties of polylactic acid composite materials during thermal processing can be changed, the crystallization speed can be accelerated, the degree of crystallinity can be increased, and the temperature resistance of composite materials can be improved. However, the crystallization process is complicated and difficult to control. The molding efficiency of the product is limited, and the modulus of the polylactic acid material after crystallization increases, and the impact strength is greatly degraded, which affects the use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] This embodiment provides a heat-resistant modified polylactic acid composite material, the mass fraction of its raw materials is as follows: polylactic acid: 50%, polybutylene succinate: 32%, polyadipic acid / butylene terephthalate Diester: 15%, erucamide: 0.3%, acetyl tributyl citrate: 0.3%, glycidyl methacrylate grafted ethyl methacrylate copolymer with a graft rate of 10%: 0.6wt% , Antioxidant 1076: 0.3%, 20000 mesh talcum powder: 1.5%.

[0019] A disposable straw is prepared from the composite material through an extrusion molding process, the thickness of the straw is 0.5mm, and the straw can be used for drinking boiled water without obvious deformation.

Embodiment 2

[0021] This embodiment provides a heat-resistant modified polylactic acid composite material, the mass fraction of its raw materials is as follows: polylactic acid: 45%, polybutylene succinate: 40%, polyadipic acid / butylene terephthalate Diester: 10%, erucamide: 0.5%, acetyl tributyl citrate: 0.5%, glycidyl methacrylate grafted ethyl methacrylate copolymer with a graft rate of 8%: 2.5wt% , Antioxidant 1076: 0.5%, 12000 mesh talcum powder: 1%.

[0022] A disposable straw is prepared by extruding the composite material. The thickness of the straw is 0.8mm, and the straw can be used for drinking boiled water without obvious deformation.

Embodiment 3

[0024] This embodiment provides a heat-resistant modified polylactic acid composite material, the mass fraction of its raw materials is as follows: polylactic acid: 60%, polybutylene succinate: 25%, polyadipic acid / butylene terephthalate Diester: 10%, Erucamide: 0.4%, Acetyl tributyl citrate: 0.1%, Glycidyl methacrylate grafted ethyl methacrylate copolymer with a graft ratio of 15%: 0.7wt% , Antioxidant 1076: 0.2%, 16000 mesh talcum powder: 4%.

[0025] The composite material is injection molded into a disposable beverage cup, the mold temperature is 50°C, and the wall thickness is 0.5mm. The beverage cup can be used to hold hot drinks without obvious deformation.

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PUM

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Abstract

The invention discloses a heat-resistant modified polylactic acid composite material composed of the following raw material components: polylactic acid, polybutylene succinate, polyadipic acid / butylene terephthalate, erucyl amide, acetyl tributyl citrate, a glycidyl methacrylate grafted ethyl methacrylate copolymer, an antioxidant 10760 and talcum powder. The heat resistance of the polylactic acidcomposite material is improved by three modes of introducing the fully biodegradable polybutylene succinate component with excellent temperature resistance, carrying out toughening treatment by adopting polyadipic acid / butylene terephthalate and promoting the crystallization behavior of a composite system by adopting superfine talcum powder; therefore, the application of the polylactic acid composite material in the field of disposable articles is adapted. A straw formed by extrusion molding of the composite material can be used for processing and preparation of hot drink packaging, and the application of the full-biomass degradable composite material in the field of disposable articles is expanded.

Description

technical field [0001] The invention relates to the technical field of polylactic acid composite materials, and more particularly, relates to a heat-resistant modified polylactic acid composite material. Background technique [0002] Polylactic acid is a bio-based and fully biodegradable environmentally friendly material prepared from natural starch as the main raw material through biological fermentation and chemical polymerization. Get fast promotional applications. With the spread of plastic restrictions and plastic bans across the country, traditional petroleum-based plastics represented by polypropylene have gradually withdrawn from the field of disposable products, replaced by fully biodegradable polylactic acid and its composite materials. However, the heat resistance of pure polylactic acid is poor, and the heat distortion temperature is only about 55 degrees, which limits its application in many occasions. [0003] The traditional temperature-resistant modificatio...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L67/02C08L51/00C08K13/02C08K3/34
CPCC08L67/04C08L2201/06C08L2201/08C08L2205/025C08L2205/035C08L2205/24C08L67/02C08L51/003C08K13/02C08K3/34
Inventor 曾广胜江太君尹琛孟聪陈一胡灿刘水长
Owner 湖南省菱越新材料有限公司
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