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Polylactic acid composite material, preparation method thereof and application thereof

A technology of composite materials and polylactic acid, which is applied in the field of heat-resistant polylactic acid composite materials and its product preparation, can solve the problems of low crystallinity, long post-processing time, low glass transition temperature, etc., and achieve good compatibility, Improved heat resistance and good mechanical properties

Active Publication Date: 2013-06-05
KINGFA SCI & TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the glass transition temperature of pure polylactic acid materials and existing polylactic acid composite materials is low, and the degree of crystallinity is not high, the post-processing time in the processing process is long, and the mechanical properties are not good, which is not conducive to wide application.

Method used

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  • Polylactic acid composite material, preparation method thereof and application thereof
  • Polylactic acid composite material, preparation method thereof and application thereof
  • Polylactic acid composite material, preparation method thereof and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] Take 40 parts of polylactic acid, 5 parts of aminosuccinic acid-lactide copolymer, 15 parts of polybutylene succinate, 1 part of zinc phenylphosphite, 20 parts of talcum powder, 20 parts of wood fiber, silane coupling 0.2 part of coupling agent γ-(2,3-glycidoxy) propyltrimethoxysilane, 0.3 part of lubricant aluminum stearate. Mix polylactic acid PLA and polybutylene succinate according to the ratio, put it in an oven, and dehumidify and dry it at 50-80°C for 8 hours; mix the dried mixture and various additives according to the ratio Put it into the high-speed mixer and mix it at high speed for 30s; use a weighing scale to accurately measure and feed it into the extruder. The length-to-diameter ratio of the extruder is 60:1; the power and model of the extruder: 65D model, co-rotating parallel twin-screw extruder; the mixing temperature is as follows: 80-90°C for the first stage; 80-90°C for the second stage; Section 90-100℃; Four sections 90-100℃; Five sections 100-110℃...

Embodiment 2

[0080] Take 30 parts of polylactic acid, 20 parts of α-alanine-lactide copolymer, 20 parts of 3-hydroxybutyrate-4-hydroxyvalerate copolymer, 4,6-di-tert-butylphenyl phosphate sodium 1 part, 10 parts of talcum powder, 20 parts of glass fiber, 0.2 part of titanate coupling agent, and 0.3 part of lubricant calcium stearate. Mix polylactic acid PLA and 3-hydroxybutyrate-4-hydroxyvalerate copolymer according to the ratio, put them in an oven, and carry out dehumidification and drying at 50-80°C for 8 hours; the dried mixture and each Put the additives into the high-speed mixer according to the ratio and mix them at high speed for 30 seconds; use a weighing scale to accurately measure and feed them into the extruder. The length-to-diameter ratio of the extruder is 60:1; the power and model of the extruder: 65D model, co-rotating parallel twin-screw extruder; the mixing temperature is as follows: 80-90°C for the first stage; 80-90°C for the second stage; Section 90-100℃; Four sectio...

Embodiment 3

[0082] Take 50 parts of polylactic acid, 10 parts of β-alanine-lactide copolymer, 15 parts of copolymer of 3-hydroxybutyric acid and 3-hydroxyvaleric acid, 1 part of zinc phenyl phosphate, 15 parts of talcum powder, paper 10 parts of fibers, 0.3 parts of titanate coupling agent, and 0.2 parts of lubricant stearamide. Mix polylactic acid PLA and 3-hydroxybutyrate-4-hydroxyvalerate copolymer according to the ratio, put them in an oven, and carry out dehumidification and drying at 50-80°C for 8 hours; the dried mixture and each Put the additives into the high-speed mixer according to the ratio and mix them at high speed for 30 seconds; use a weighing scale to accurately measure and feed them into the extruder. The length-to-diameter ratio of the extruder is 60:1; the power and model of the extruder: 65D model, co-rotating parallel twin-screw extruder; the mixing temperature is as follows: 80-90°C for the first stage; 80-90°C for the second stage; Section 90-100℃; Four sections 9...

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Abstract

The invention provides a polylactic acid composite material, a preparation method of the polylactic acid composite material and application of the polylactic acid composite material. The main components of the polylactic acid composite material comprises, by weight, 30-60 parts of polylactic acid, 5-10 parts of oligomeric protein copolymer, 5-20 parts of biodegradable polyester, 0.1-5 parts phosphate containing aromatic group, 5-20 parts of talcum powder, 5-20 parts of fibers, 0.1-1 part of coupling agent, and 0.1-1 part of lubricating agent. The oligomeric protein copolymer is the copolymer of amino acid and lactide. Weight-average molecular weight of the oligomeric protein copolymer is less than ten thousand. According to the polylactic acid composite material, the oligomeric protein copolymer is added into the raw material of the polylactic acid composite material, heat resistance of the polylactic acid composite material is improved, compatibility of the obtained material is good, and mechanical property of the obtained material is good.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a heat-resistant polylactic acid composite material, its product preparation method and its application. Background technique [0002] General-purpose plastics are widely used in various fields due to their excellent comprehensive properties. They are listed as the four major support materials along with steel, wood, and cement, and their annual usage continues to rise. General-purpose plastics such as polyethylene (PE), polypropylene (PP) and polystyrene (PS) can exist stably in nature for a long time and are difficult to degrade, so they are difficult to recycle after being discarded, causing serious pollution to the environment. Biodegradable plastics have become one of the effective ways to solve the problem of plastic waste environmental pollution because of their rapid degradation in the natural environment, which has attracted people's attention, and countries all over the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L77/12C08L67/02C08L97/02C08K13/02C08K13/04C08K7/14C08K3/34B29C47/92B29C48/92
CPCB29C48/40B29C48/92B29C2948/92704B29C2948/92895
Inventor 熊凯焦建钟宇科苑仁旭赵巍徐依斌曾祥斌蔡彤旻夏世勇
Owner KINGFA SCI & TECH CO LTD
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