Full-biodegradation high-tenacity heat-resistant type polylactic resin and preparation method thereof

A polylactic acid resin and high toughness technology, applied in the field of fully biodegradable high toughness heat-resistant polylactic acid resin and its preparation, can solve the problems of polylactic acid degradation performance, white pollution, poor compatibility, etc., and achieve excellent processing performance , the process is simple, the effect of good heat resistance

Active Publication Date: 2010-09-08
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, the large-scale application of synthetic polymer materials has also produced two major problems: the exhaustion of limited petroleum resources and the problem of white pollution caused by waste plastics
The blending modification method can effectively improve the toughness of polylactic acid, but on the other hand, there are also problems such as poor compatibility between blending components, unsatisfactory mechanical properties of the blended system, and degradation of polylactic acid degradation performance.
For example, the publication specification CN1250065A of Chinese invention paten

Method used

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  • Full-biodegradation high-tenacity heat-resistant type polylactic resin and preparation method thereof

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Effect test

Embodiment 1

[0020] Get 80 parts by weight of polylactic acid resin with weight average molecular weight of 130,000, 20 parts by weight of polybutylene succinate with weight average molecular weight of 80,000, and 0.1 part by weight of dicumyl peroxide, 1 part by weight of glycidyl methacrylate. After the above materials are stirred evenly by a high-speed mixer, they are blended and extruded in a twin-screw extruder at an extrusion temperature of 185°C and a screw speed of 30rpm; Injection molding under injection molding conditions, and then annealing at an annealing temperature of 80° C. for 60 minutes to obtain a fully biodegradable high-toughness heat-resistant polylactic acid resin.

Embodiment 2

[0022] Get 80 parts by weight of polylactic acid resin with weight average molecular weight of 130,000, 20 parts by weight of polybutylene succinate with weight average molecular weight of 70,000, and 0.2 parts by weight of dicumyl peroxide, 1 part by weight of glycidyl methacrylate. After the above materials are stirred evenly by a high-speed mixer, they are blended and extruded in a twin-screw extruder at an extrusion temperature of 185°C and a screw speed of 20rpm; the extruded resin is molded at an injection temperature of 180°C and an injection pressure of 10MPa After injection molding, it is annealed at an annealing temperature of 80° C. for 60 minutes to obtain a fully biodegradable high-toughness heat-resistant polylactic acid resin.

Embodiment 3

[0024] Get 80 parts by weight of polylactic acid resin with weight average molecular weight of 130,000, 20 parts by weight of polybutylene succinate with weight average molecular weight of 80,000, and 0.25 parts by weight of dicumyl peroxide, 2.5 parts by weight of glycidyl methacrylate. After the above materials are stirred evenly by a high-speed mixer, they are blended and extruded in a twin-screw extruder at an extrusion temperature of 185°C and a screw speed of 20rpm; the extruded resin is molded at an injection temperature of 180°C and an injection pressure of 10MPa After injection molding, it is annealed at an annealing temperature of 80° C. for 60 minutes to obtain a fully biodegradable high-toughness heat-resistant polylactic acid resin.

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Abstract

The invention discloses full-biodegradation high-tenacity heat-resistant type polylactic resin and a preparation method thereof. The polylactic resin comprises polylactic resin, polybutylene succinate, dicumyl peroxide and glycidyl methacrylate; and the weight-average molecular weight of the polylactic resin is 8-13 ten thousand, and the weight-average molecular weight of the polybutylene succinate is 7-11 ten thousand. In parts by weight, the total amount of the polylactic resin and the polybutylene succinate is 100 parts, wherein the polylactic resin accounts for 70-90 parts, the polybutylene succinate accounts for 10-30 parts, the dicumyl peroxide accounts for 0.1-1 part, and the glycidyl methacrylate accounts for 1-10 parts. Compared with the prior art, the full-biodegradation high-tenacity heat-resistant type polylactic resin has good biodegradation property, mechanical property and heat-resisting property; and the preparation method has simple technique process, excellent processing performance and low cost, and can realize large-scale industrial production.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a fully biodegradable high-toughness heat-resistant polylactic acid resin and a preparation method thereof. Background technique [0002] In the 20th century, the advent and rapid development of synthetic polymer materials have greatly improved human life. With the increasing application of polymer materials, synthetic polymer materials have become the four pillars of the material field alongside steel, wood and cement. However, the large-scale application of synthetic polymer materials has also produced two major problems: the exhaustion of limited petroleum resources and the white pollution caused by waste plastics. Therefore, the research and development of biodegradable polymer materials capable of protecting the environment has flourished all over the world. [0003] Polylactic acid (PLA) is a biodegradable polymer prepared by chemical synthesis using...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L67/02C08K5/14C08K5/1515
Inventor 郑文革卢朝辉王继文张好斌
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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