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

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...

AI Technical Summary

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 patent application discloses adding polycarbonate in polylactic acid; The degradation performance of polylactic acid decreases or the degradation products cause damage to the environment; Chinese invention patent application publication CA1475530A discloses that adding degradable polybutylene succinate (PBS) to the polylactic acid system can be toughened. At the same time, the original biodegradation characteristics of polylactic acid are retained, but due to the poor compatibility of polylactic acid and other polymers, the mechanical properties of the blended system cannot achieve the desired effect.

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