Polylactic acid toughening and modifying agent and preparation method thereof

A technology of toughening modifier and polylactic acid, applied in the field of preparation of polylactic acid toughening modifier, can solve the problems of high cost, increase in cost, increase market competitiveness, etc., and achieve good compatibility and low cost. Effect

Inactive Publication Date: 2012-06-20
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cost of synthesizing the required plasticizer is relatively high, which will easily cause an increase in the cost of the final polylactic acid polymer composition, which is not conducive to increasing its market competitiveness.

Method used

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  • Polylactic acid toughening and modifying agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Castor oil and L-lactic acid are fed according to the material ratio of 1:2, stannous chloride is used as a catalyst, and reacted for a certain period of time under a certain vacuum at 150°C. After the product is purified, toughener A is obtained, and the number average is measured by GPC. The molecular weight is 6810, ready for use.

Embodiment 2

[0025] Feed polycastor oil and DL-lactic acid according to the material ratio of 1:3, stannous octoate is used as the catalyst, and the reaction temperature is 170°C. First, react for a period of time under nitrogen atmosphere, and then react under a certain degree of vacuum, and the reaction is over. The final product was purified to obtain toughening agent B, and the number average molecular weight was 18750 as measured by GPC, and it was ready for use.

Embodiment 3

[0027] Feed castor oil and succinic acid according to the material ratio of 1:1.5, and directly polycondense at 180 ° C. The reaction is first reacted under a nitrogen atmosphere for a period of time, and then reacted under a certain degree of vacuum. After the reaction is completed, a toughening agent is obtained. C, the number average molecular weight measured by GPC is 3052, ready for use.

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Abstract

The invention relates to a polylactic acid toughening and modifying agent and a preparation method thereof. The method comprises the following steps of: proportioning the raw materials consisting of polyalcohol and hydroxy acid or polyacid/anhydride according to the mass ratio of 1:0.5 to 1:2,000, and carrying out condensation polymerization at 130-210 DEG C for 0.5-24 h to prepare a polyester polyol polylactic acid toughening and modifying agent polymer. Compared with the prior art, the polylactic acid toughening and modifying agent disclosed by the invention has the advantages of being nontoxic, harmless, completely biodegraded, free from negative effects on the environment and human health and the like.

Description

technical field [0001] The invention relates to a material and a method in the technical field of polymer materials, in particular to a preparation method of a polylactic acid toughening modifier. Background technique [0002] With the rapid development of the national economy, the use of polymer materials has penetrated into all areas of people's lives, bringing great convenience to our lives. However, most of the commonly used polymer materials are made of petroleum, which are difficult to biodegrade when discarded into the environment after use, thus causing serious environmental pollution problems, such as "white pollution". With the increasing shortage of petroleum resources, people's high attention to environmental issues and the improvement of life quality requirements, the development of fully biodegradable polymer materials has become a research hotspot at home and abroad. [0003] Polylactic acid (PLA) is converted from starch extracted from renewable plant resour...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L67/08C08L67/00C08G63/06C08G63/49C08G63/12C08G63/42
Inventor 袁角亮杨斌木合塔尔
Owner SHANGHAI JIAO TONG UNIV
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