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Polylactic acid composition and polylactic acid product

A technology of polylactic acid and composition, which is applied in the field of polylactic acid composition and polylactic acid products, can solve the problems of low elongation at break, no improvement in blow molding processability, low melt strength, etc., and achieve good comprehensiveness Mechanical properties, the effect of improving blow molding processing performance

Inactive Publication Date: 2012-08-01
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method of modifying polylactic acid by physical blending can improve the processing performance of polylactic acid, but the compatibility between the modified material and polylactic acid will affect the stability of the obtained polylactic acid blown film resin; and Using this method of blending polylactic acid and flexible plastics, the melt strength of the obtained polylactic acid composition is still low, the elongation at break is low, the toughness is insufficient, and the tear resistance is insufficient, making its comprehensive mechanical properties poor. Does not substantially improve its blow molding processability

Method used

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  • Polylactic acid composition and polylactic acid product

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preparation example Construction

[0065] The present invention provides a polylactic acid product, which is made of polylactic acid resin comprising the polylactic acid composition described in the above technical solution or the polylactic acid composition obtained by the preparation method described in the above technical solution and additives. The present invention uses the polylactic acid composition described in the above technical solution or the polylactic acid composition obtained by the preparation method described in the above technical solution as the main raw material, adds additives therein, and processes it into polylactic acid products. The present invention has no special restrictions on the preparation process of polylactic acid products, and the technical solution for the preparation of polymer material products well-known to those skilled in the art can be used. For example, polylactic acid plastic products can be obtained by molding methods, or blown film The film preparation method is used...

Embodiment 1

[0077] In parts by weight, 60 parts of polylactic acid, 20 parts of polybutylene adipate-terephthalate, 10 parts of polybutylene succinate, 4 parts of tributyl citrate, 5 parts of calcium carbonate , 0.1 part of benzoyl peroxide, 0.1 part of polyepoxy methyl acrylate, 0.1 part of zinc stearate, 0.4 part of niacinamide, 0.1 part of light stabilizer GW540, 0.1 part of antioxidant 1010 and 0.1 part of monolaurin After the acid glyceride is dried, the above components are fully mixed in a mixer, and then the obtained mixture is pelletized in a twin-screw extruder to obtain polylactic acid resin pellets. The parameters of the twin-screw extruder are set to: feed The mouth temperature is 165°C, the temperature of the first heating zone is 171°C, the temperature of the second heating zone is 171°C, the temperature of the third heating zone is 172°C, and the temperature of the die head is 171°C.

[0078] In the present invention, the obtained polylactic acid resin pellets are prepared...

Embodiment 2

[0082] In parts by weight, 65 parts of polylactic acid, 5 parts of polybutylene adipate-terephthalate, 25 parts of polybutylene succinate, 4 parts of polyethylene glycol, 0.2 parts of benzene peroxide Formyl, 0.1 part of polyepoxy methyl acrylate, 0.4 part of nicotinic acid amide, 0.1 part of light stabilizer GW540, 0.1 part of antioxidant 1010 and 0.1 part of glyceryl monolaurate are dried and fully mixed in a mixer Mixing, and then granulating the obtained mixture in a twin-screw extruder to obtain polylactic acid resin pellets, the parameters of the twin-screw extruder are set as follows: the temperature of the feeding port is 165°C, the temperature of the first heating zone is 171°C, The temperature of the second heating zone is 171°C, the temperature of the third heating zone is 172°C, and the temperature of the die head is 171°C.

[0083] In the present invention, the obtained polylactic acid resin pellets are prepared in an injection molding machine for standard splines...

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Abstract

The invention provides a polylactic acid composition and a polylactic acid product. The polylactic acid composition comprises the following components by weight percent: 50 to 80 percent of polylactic acid, 0 to 35 percent of adipic acid-polybutylene terephthalate, 0 to 35 percent of poly(butylene succinate), 0.05 to 0.5 percent of peroxide, 0.05 to 0.5 percent of chain extendor and 3 to 15 percent of plasticizer, wherein the content of the adipic acid-polybutylene terephthalate and the content of the poly(butylene succinate) are not 0 percent. The mechanical properties such as melt strength, elongation at break, tenacity and anti-tear strength of the polylactic acid composition provided by the invention are improved, so that the polylactic acid composition with better comprehensive mechanical properties can be obtained, and the polylactic acid composition has more stable processability and better film forming stability.

Description

technical field [0001] The invention relates to the technical field of polymers, in particular to a polylactic acid composition and polylactic acid products. Background technique [0002] At present, plastic products have penetrated into all fields of the national economy, and the annual consumption of plastic products in the world has reached 300 million tons. However, the environmental pollution and energy crisis brought about by the widespread use of plastics are also becoming more and more serious. The garbage produced by plastics has brought huge negative impacts on the earth's ecological environment, food production, and water resources. In the 21st century, the pollution caused by plastics has become a major scientific and technological problem, environmental problem and economic problem faced by countries all over the world. In order to solve various problems caused by the use of plastics, biodegradable polymer materials have been developed in the prior art. [000...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L67/02C08L33/14C08K5/04C08K5/14C08K5/1515
Inventor 黄绍永陈学思张宝李杲庄秀丽
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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