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Polylactic acid resin combination

A technology of polylactic acid resin and composition, which is applied in the field of polylactic acid resin and its preparation, can solve the problems that the notched impact strength and elongation at break are not significantly improved, and achieve good anti-aging and anti-ultraviolet capabilities, simple equipment, and a process advanced effects

Active Publication Date: 2014-08-06
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This modification method improves the tensile strength, but the improvement of notched impact strength and elongation at break is not obvious

Method used

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  • Polylactic acid resin combination

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Add 77g of butyl acrylate, 20g of ethyl acrylate, 3g of glycidyl methacrylate, toluene and 0.1g of di-tert-butyl peroxide initiator mixture into the reactor, and heat the mixture to 130°C in an oil bath A polymerization reaction is carried out, and the reaction product is extruded by a twin-screw extruder to obtain a butyl acrylate-ethyl acrylate-glycidyl methacrylate terpolymer.

[0053] Mix 100g of polylactic acid with a number average molecular weight of 80,000 Daltons, 5g of the above-prepared butyl acrylate-ethyl acrylate-glycidyl methacrylate terpolymer and 0.5g of antioxidant with a mass ratio of 1:2. The mixture of agent 1010 and antioxidant 168 was first mechanically mixed into a premix, and then added to a rubber-plastic mixer for banburying. The process temperature was 185°C, the speed was 40 rpm, and the time was 5 minutes. The polylactic acid resin composition was prepared. .

[0054] The prepared polylactic acid resin was subjected to a mechanical perform...

Embodiment 2

[0056] Add 77g of butyl acrylate, 20g of ethyl acrylate, 3g of glycidyl methacrylate, toluene and 0.1g of di-tert-butyl peroxide initiator mixture into the reactor, and heat the mixture to 130°C in an oil bath A polymerization reaction is carried out, and the reaction product is extruded by a twin-screw extruder to obtain a butyl acrylate-ethyl acrylate-glycidyl methacrylate terpolymer.

[0057] Mix 100g of polylactic acid with a number average molecular weight of 80,000 Daltons, 10g of the above-prepared butyl acrylate-ethyl acrylate-glycidyl methacrylate terpolymer and 0.3g of antioxidant with a mass ratio of 1:2. The mixture of agent 1010 and antioxidant 168 was first mechanically mixed into a premix, and then added to a rubber-plastic mixer for banburying. The process temperature was 185°C, the speed was 40 rpm, and the time was 5 minutes. The polylactic acid resin composition was prepared. .

[0058] The prepared polylactic acid resin was subjected to a mechanical perfor...

Embodiment 3

[0060] Add 77g of butyl acrylate, 20g of ethyl acrylate, 3g of glycidyl methacrylate, toluene and 0.1g of di-tert-butyl peroxide initiator mixture into the reactor, and heat the mixture to 130°C in an oil bath A polymerization reaction is carried out, and the reaction product is extruded by a twin-screw extruder to obtain a butyl acrylate-ethyl acrylate-glycidyl methacrylate terpolymer.

[0061] Mix 100g of polylactic acid with a number average molecular weight of 200,000 Daltons, 15g of the above-prepared butyl acrylate-ethyl acrylate-glycidyl methacrylate terpolymer and 0.3g of antioxidant with a mass ratio of 1:2. The mixture of agent 1010 and antioxidant 168 was first mechanically mixed into a premix, and then added to a rubber-plastic mixer for banburying. The process temperature was 185°C, the speed was 40 rpm, and the time was 5 minutes. The polylactic acid resin composition was prepared. .

[0062] The prepared polylactic acid resin was subjected to a mechanical perfo...

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Abstract

The invention provides a polylactic acid resin combination which is characterized by comprising the following materials in part by weight: 100 parts of polylactic acid, 5-25 parts of toughening agent and 0.1-1 part of anti-oxidant, wherein the toughening agent is a butyl acrylate, ethyl acrylate and epoxypropyl methacrylate terpolymer which, as the toughening agent of the polylactic acid, can effectively improve brake elongation, shock strength and tensile strength of the polylactic acid and reduce the blend viscosity, and as a result, the polylactic acid having good comprehensive performance can be obtained. Meanwhile, the refraction index of the polylactic acid is 1.454 and is close to that of the butyl acrylate, ethyl acrylate and epoxypropyl methacrylate terpolymer. Therefore, as for the polylactic acid, the transparency is maintained, the rheological behavior is improved, and the processability of the polylactic acid is improved. The polylactic acid resin combination is suitable for various processing requirements.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a polylactic acid resin and a preparation method thereof. Background technique [0002] Polylactic acid is an aliphatic thermoplastic polyester. It not only has good biodegradability, but also comes from renewable plant resources. It is the most promising green environmental protection material in the 21st century and is a research and development hotspot in various countries. Polylactic acid has high tensile strength and good transparency, and can be applied to the preparation of various plastic products; it also has good processing properties and can be widely used in traditional extrusion, injection molding, blow molding and other processing methods. However, due to the serious brittleness of polylactic acid, the impact strength is less than 5KJ / m 2 , greatly restricting its wide application. [0003] At present, in view of the serious brittleness of PLA, extensive research ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/04C08L33/08C08K5/134C08K5/526C08F220/18C08F220/32
Inventor 张会良郝艳平边俊甲孙树林梁宏玉韩常玉庄宇刚董丽松
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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