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Glycidyl methacrylate grafted polylactic acid copolymer material, preparation method for same and application thereof

A polylactic acid copolymer and glycidyl ester technology, which is applied in the field of glycidyl methacrylate grafted polylactic acid copolymer materials and its preparation, can solve the problem of affecting the comprehensive performance of materials, and the coupling agent does not consider the related effects of polylactic acid matrix , small molecule coupling agent seepage and other problems, to achieve the effect of improving interfacial compatibility, improving mechanical properties, and no solvent pollution

Active Publication Date: 2012-07-25
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these technical solutions can improve the mechanical properties of polylactic acid-based composite materials to a certain extent, these coupling agents do not consider the correlation with the polylactic acid matrix, and small molecule coupling agents are easy to seep out of the material, affecting the material's mechanical properties. Comprehensive performance

Method used

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  • Glycidyl methacrylate grafted polylactic acid copolymer material, preparation method for same and application thereof
  • Glycidyl methacrylate grafted polylactic acid copolymer material, preparation method for same and application thereof
  • Glycidyl methacrylate grafted polylactic acid copolymer material, preparation method for same and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Take polylactic acid resin (the number average molecular weight is 100,000, Natureworks4032D, LD mixed type polylactic acid, L type is 97%, D type is 3%) 96.0% by weight percentage, glycidyl methacrylate 3.0%, peroxide 1.0% of tert-butyl benzoate is used as a mixed material; the mixed material is added to a twin-screw extruder for melt extrusion and granulation to obtain a granular product (ie glycidyl methacrylate grafted polylactic acid copolymer material). Among them, the temperature of each section of the mixed material in the twin-screw extruder is respectively: the temperature of the feeding section is 165°C, the temperature of the compression section is 175°C, the temperature of the metering section is 180°C, the temperature of the head is 185°C, and the speed of the twin-screw extruder is 300 rpm. The molecular weight, molecular weight distribution and epoxy value of the sample are shown in Table 1.

Embodiment 2

[0058] Take by weight percentage polylactic acid resin (number average molecular weight is 100,000, Natureworks4032D, LD mixed type polylactic acid, L type is 97%, D type is 3%) 94.0%, glycidyl methacrylate 5.0%, peroxide 1.0% of tert-butyl benzoate, after mixing uniformly, is used as a mixed material; the mixed material is added into a twin-screw extruder to melt and extrude, and granulated to obtain a granular product (i.e. glycidyl methacrylate grafted polylactic acid copolymer Material). Among them, the temperature of each section of the mixed material in the twin-screw extruder is respectively: the temperature of the feeding section is 165°C, the temperature of the compression section is 175°C, the temperature of the metering section is 180°C, the temperature of the head is 185°C, and the speed of the twin-screw extruder is 300 rpm. The molecular weight, molecular weight distribution and epoxy value of the sample are shown in Table 1.

Embodiment 3

[0060] Take by weight percentage polylactic acid resin (number average molecular weight is 100,000, Natureworks4032D, LD mixed type polylactic acid, L type is 97%, D type is 3%) 95.0%, glycidyl methacrylate 3.0%, peroxide 2.0% of tert-butyl benzoate, after mixing uniformly, is used as a mixed material; the mixed material is added into a twin-screw extruder to melt and extrude, and granulated to obtain a granular product (i.e. glycidyl methacrylate grafted polylactic acid copolymer Material). Among them, the temperature of each section of the mixed material in the twin-screw extruder is respectively: the temperature of the feeding section is 165°C, the temperature of the compression section is 175°C, the temperature of the metering section is 180°C, the temperature of the head is 185°C, and the speed of the twin-screw extruder is 300 rpm. The molecular weight, molecular weight distribution and epoxy value of the sample are shown in Table 1.

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Abstract

The invention discloses a glycidyl methacrylate grafted polylactic acid copolymer material, which is made of, in weight percentage, 93%-97% of polylactic resin, 1%-5% of glycidyl methacrylate and 1%-2% of radical initiator. The glycidyl methacrylate grafted polylactic acid copolymer material can serve as a novel efficient coupling agent to be applied to polyester based composite materials, so that the polyester based composite materials embody excellent performances. The invention further discloses a preparation method for the glycidyl methacrylate grafted polylactic acid copolymer material, which includes the steps: weighing the polylactic resin, the glycidyl methacrylate and the radical initiator according to the weight percentage, and uniformly mixing to serve as mixed materials; and adding the mixed materials into a double-screw extruder for melt extrusion and granulation so as to obtain a granular product. The method has the advantages of high production efficiency, low cost, no solvent pollution, high grafting ratio and the like, is easy in large-scale industrial production and has good economic benefit.

Description

technical field [0001] The invention relates to the fields of plastic modification and composite material preparation, in particular to a glycidyl methacrylate grafted polylactic acid copolymer material and its preparation method and application. Background technique [0002] Polylactic acid is a biodegradable, bio-based thermoplastic aliphatic polyester plastic. Polylactic acid is derived from some recyclable natural resources such as cornstarch. Compared with other bio-based plastics, polylactic acid has relatively high modulus and strength, so it is widely used in important fields such as biomedicine and packaging industries. [0003] However, polylactic acid also has some disadvantages, such as high brittleness, poor heat resistance, and high price, which restrict its application in daily life. Usually by adding wood powder, natural fiber, starch and other fillers to polylactic acid to prepare polylactic acid-based composite materials, its performance can be improved a...

Claims

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Application Information

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IPC IPC(8): C08F283/02C08F220/32B29B9/06B29C47/92C08L67/04C08L97/02C08L51/08B29C48/92
CPCB29C48/40B29C48/92B29C2948/9259B29C2948/92704B29C2948/92885B29C2948/92895
Inventor 徐天强朱锦汤兆宾张传芝
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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