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Polylactic acid-polyester composite material and preparation method thereof

A polyester composite material and composite material technology, applied in the field of polylactic acid-polyester composite materials, can solve the problems of limited toughening effect on impact resistance and tensile properties, reduced toxicity or biodegradation performance, etc., and achieve comprehensive mechanical properties Good, enhanced compatibility, good biodegradability effect

Active Publication Date: 2014-05-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the limited toughening effect in the impact resistance and tensile properties of the existing polylactic acid toughening modification method, or the modification will bring toxicity or biodegradability relative to polylactic acid Obviously reduced defects, providing a polylactic acid-polyester composite material and a preparation method thereof

Method used

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  • Polylactic acid-polyester composite material and preparation method thereof
  • Polylactic acid-polyester composite material and preparation method thereof
  • Polylactic acid-polyester composite material and preparation method thereof

Examples

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preparation example Construction

[0056] The tri-block copolyester can be prepared according to conventional methods. Preferably, the tri-block copolyester can be prepared according to the method disclosed in CN102443145A. Specifically, the preparation method of the three-block copolyester may include: in the presence of an organotin compound, under the esterification reaction conditions, under an inert atmosphere, make a linear aliphatic aromatic copolyester and acrylic acid Lactide contact, the linear aliphatic aromatic copolyester includes structural units as shown in the following formula 2 and formula 3,

[0057]

[0058] Formula 2

[0059]

[0060] Formula 3

[0061] Wherein, m is an integer of 1-20, preferably an integer of 2-10; n is an integer of 1-16, preferably an integer of 2-8; t is an integer of 1-20, preferably an integer of 2-10; The molar ratio of the structural units shown in formula 2 and formula 3 is 1:0.1-10, preferably 1:0.5-2; the weight average molecular weight of the linear al...

Embodiment 1

[0139] This example is used to illustrate the polylactic acid-polyester composite material of the present invention and its preparation method.

[0140] (1) Preparation of branched aliphatic aromatic copolyesters

[0141] Catalyst: The catalyst contains 57.8% by weight of lanthanum stearate (prepared according to the method of Example A5 in CN1807485A, the same below), 23.2% by weight of tetrabutyl titanate (purchased from Beijing Chemical Reagent Company, the same below), 10.0% by weight of dibutyltin oxide (purchased from Beijing No. 3 Chemical Plant, the same below) and 9.0% by weight of triphenylhydroxytin (purchased from Beijing Chemical Reagent Company, the same below).

[0142] Add 1.72mol of terephthalic acid, 2.77mol of 1,4-butanediol and 1.058g of the above catalyst into a 2.5L reactor, stir and heat to reflux under a nitrogen atmosphere, adjust the temperature to 230°C and Under the reaction, when the water generated by the reaction is completely distilled (the rea...

Embodiment 2

[0153] This example is used to illustrate the polylactic acid-polyester composite material of the present invention and its preparation method.

[0154] Mix 300g of L-polylactic acid, 60g of triblock copolyester TP1 prepared in step (2) of Example 1, and 140g of aliphatic aromatic copolyester P1 prepared in step (1) of Example 1, and then add 0.5 g of erucamide and 1 g of 2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane were mixed. The material obtained after mixing is extruded and granulated through a twin-screw extruder. The screw speed is controlled at 30 rpm. 170°C, 170°C and 165°C to prepare polylactic acid-polyester composite material A2.

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Abstract

The invention relates to a polylactic acid-polyester composite material. The composite material contains polylactic acid, aliphatic aromatic copolyester, triblock copolyester and an organic peroxide. The invention also relates to a preparation method of the polylactic acid-polyester composite material. The method comprises the following steps: mixing polylactic acid, the aliphatic aromatic copolyester, the triblock copolyester and the organic peroxide, and carrying out extruding granulation of the above obtained mixture. The polylactic acid-polyester composite material has excellent comprehensive mechanical performances and an excellent biological degradability.

Description

technical field [0001] The invention relates to a polylactic acid-polyester composite material, a preparation method of the polylactic acid-polyester composite material, and a polylactic acid-polyester composite material prepared by the method. Background technique [0002] Polylactic acid is a biodegradable material from bio-based, because it gets rid of the only dependence on petroleum resources, and the product can be completely degraded by microorganisms after use, and the final products are carbon dioxide and water, returning to the natural life cycle Locus, its remarkable low carbon load, biocompatibility, biodegradability and good mechanical properties and performance, is currently unmatched by any other material. However, the brittleness of the polylactic acid material itself due to its high glass transition temperature (about 50-60 °C) and its poor heat resistance due to its low softening point greatly limit the application of polylactic acid. Therefore, researcher...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L67/02C08L67/00C08G63/85C08G63/84C08G63/83C08G63/20C08G63/08C08K5/14
Inventor 祝桂香许宁张伟邹弋计文希韩翎
Owner CHINA PETROLEUM & CHEM CORP
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