Method for preparing three-dimensional block polylactic acid at high efficiency

A polylactic acid and three-dimensional technology, which is applied in the field of efficient preparation of three-dimensional block polylactic acid, can solve the problems of low production efficiency and achieve the effects of convenient operation, low cost and high yield

Inactive Publication Date: 2013-02-13
SHANGHAI KEYUAN BIO MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the problem that the production efficiency of the existing three-dimensional composite polylactic acid is not high, and discloses a method for efficiently preparing three-dimensional block polylactic acid to meet the needs of production and application

Method used

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  • Method for preparing three-dimensional block polylactic acid at high efficiency
  • Method for preparing three-dimensional block polylactic acid at high efficiency
  • Method for preparing three-dimensional block polylactic acid at high efficiency

Examples

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Effect test

preparation example 1

[0024] Add 20.0g of polymer grade D-type lactide, 0.004g of stannous octoate, and 0.18g of lauryl alcohol into the polymerization reactor. Under the protection of nitrogen, heat up to the first reaction temperature of 180°C, and react for 4 hours after reaching the set temperature. Then the temperature was lowered to the second reaction temperature of 130° C., and the reaction was performed for 2 hours to obtain the prepolymer P1.

preparation example 2

[0026] Add 20.0g of polymer grade D-type lactide, 0.004g of stannous octoate, and 0.10g of lauryl alcohol into the polymerization reactor. Under the protection of nitrogen, heat up to the first reaction temperature of 190°C, and react for 0h after reaching the set temperature. Then the temperature was lowered to the second reaction temperature of 100° C. and reacted for 5 hours to obtain prepolymer P2.

preparation example 3

[0028] Add 20.0g of polymer grade D-type lactide, 0.004g of stannous octoate, and 0.18g of lauryl alcohol into the polymerization reactor. Under the protection of nitrogen, heat up to the first reaction temperature of 180°C, and react for 0h after reaching the set temperature. Prepolymer P3 is obtained.

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Abstract

The invention provides a method for preparing three-dimensional block polylactic acid at high efficiency. The method is characterized by comprising the following steps of: (1) pre-polymerizing: adding polymerization-stage D type (or L type) lactide, a catalyst and an initiator into a polymerization reactor, heating to the first reaction temperature of 160-200DEG C under the protection of inert gas, reacting for 0-1hour after a set temperature is achieved, cooling to the second reaction temperature of 100-150 DEG C, and reacting for 0.5-5hours to obtain a prepolymer; and (2) carrying out block copolymerization: taking the prepolymer prepared by the step (1) as a raw material, adding the polymerization-stage L type (or D type) lactide into the polymerization reactor, wherein the mass ratio is (1:9)-(3:7), the reaction temperature is 190-230DEG C under the protection of inert gas, and the reaction time is 0.5-5hours after the set temperature is achieved, so that the three-dimensional block polylactic acid can be obtained.

Description

technical field [0001] The invention belongs to the field of organic polymer materials, and relates to a preparation method of polylactic acid, in particular to a method for efficiently preparing three-dimensional block polylactic acid. Background technique [0002] Polylactic acid (PLA) is a biodegradable polymer material produced from renewable resources such as corn starch. An ideal ecological cycle that participates in the process of regeneration of biomass resources is part of the natural carbon cycle. Polylactic acid is a thermoplastic high polymer with similar physical and mechanical properties to polystyrene, polyester, etc. It has excellent physical and mechanical properties and good processing performance. It can be processed by traditional methods, and can also be blended or copolymerized with general-purpose plastics. , in agriculture, packaging materials, daily life, clothing and biomedical materials and other fields have good application prospects, so polylact...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/08C08G63/78
Inventor 印培民蒲文亮侯文婷
Owner SHANGHAI KEYUAN BIO MATERIAL
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