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Biodegradable high-molecular-weight aliphatic/aromatic copolymer, and its preparing method and use

A biodegradable, high-molecular-weight technology, applied in the field of biodegradable high-molecular-weight aliphatic/aromatic copolymers, can solve the problems of difficult adjustment of biodegradation rate, low glass transition temperature, and polybutylene succinate crystallinity advanced questions

Inactive Publication Date: 2007-03-28
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention solves the problem of high crystallinity, brittleness, low glass transition temperature and difficult adjustment of biodegradation rate of biodegradable polybutylene succinate (PBS). And other issues

Method used

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  • Biodegradable high-molecular-weight aliphatic/aromatic copolymer, and its preparing method and use
  • Biodegradable high-molecular-weight aliphatic/aromatic copolymer, and its preparing method and use
  • Biodegradable high-molecular-weight aliphatic/aromatic copolymer, and its preparing method and use

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preparation example Construction

[0032]The molecular weight and molecular weight distribution of a biodegradable high molecular weight aliphatic / aromatic copolymer obtained according to the preparation method provided by the present invention are measured by gel permeation chromatography (GPC). Polystyrene with a series of molecular weights with a narrow molecular weight distribution is used as a calibration standard sample, chloroform is used as an eluting phase, and the measurement temperature is 40°C.

[0033] 【Chemical Composition and Structure】

[0034] The structure and composition of the compound obtained according to the preparation method provided by the present invention are determined by nuclear magnetic resonance (NMR) of the solution, the measurement temperature of the NMR is room temperature, and the solvent is deuterated chloroform.

[0035] 【Thermophysical properties】

[0036] By differential scanning calorimetry (DSC), the melting point and glass transition temperature of the compound can be...

Embodiment 1

[0040] At room temperature, 26.28g of dimethyl succinate, 3.88g of dimethyl terephthalate, 18.9g of 1,4-butanediol and 56.8mg of tetraisopropoxytitanium were sequentially added to a 200ml volume four of high-purity nitrogen replacement. necked round bottom flask. At the same time, the four-necked flask is equipped with a high-purity nitrogen gas inlet, a mechanical stirrer, and a condensation water separator. The above reaction system was moved into an oil bath at 180°C, stirred and reacted for 1 to 2 hours with nitrogen gas, and then decompressed slowly, and the temperature of the oil bath was gradually increased to 230°C. The vacuum degree is controlled within 150Pa. When the torque value of the stirring rod is constant or the product is entangled on the stirring rod and forms a ball, the reaction is considered to be over. After cooling, the product of the above polymerization reaction was first dissolved in chloroform, and then filtered, and excess cold methanol was added...

Embodiment 2

[0042] At room temperature, 20.44g of dimethyl succinate, 11.64g of dimethyl terephthalate, 18.9g of 1,4-butanediol and 18.9mg of tetraisopropoxytitanium were sequentially added to a 200ml volume four of high-purity nitrogen replacement. necked round bottom flask. At the same time, the four-neck flask is equipped with a high-purity nitrogen gas inlet, a mechanical stirrer, and a condensation water separator. The above reaction system was moved into an oil bath at 180°C, stirred and reacted for 1 to 2 hours with nitrogen gas, and then decompressed slowly, and the temperature of the oil bath was gradually increased to 230°C. The vacuum degree is controlled within 150Pa. When the torque value of the stirring rod is constant or the product is entangled on the stirring rod and forms a ball, the reaction is considered to be over. After cooling, the product of the above polymerization reaction was first dissolved in chloroform, and then filtered, and excess cold methanol was added ...

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Abstract

The invention relates to biodegradability high molecular weight aliphatics / aromatic copolymer. Its chemical constitution general formula is [OOCR1COOR2O]m [OOCC6H4COOCR3CO]n whose R1 is saturated or unsaturated linear chain alkylidene groups or alicyclic ring base group with 0-8 alpha carbon atom; R2 and R3 is the saturated or unsaturated linear chain alkylidene groups or alicyclic ring base group with 2-10 alpha carbon atom; n is 100-1000; m is 100-1000; weight-average molecular weight is 100-350 thousand. It can be used as environment amiable material such as textile fiber, plastic etc.

Description

technical field [0001] The invention relates to a biodegradable high molecular weight aliphatic / aromatic copolymer, a preparation method and application. The aliphatic / aromatic copolymer provided by the present invention is a thermoplastic and crystalline biodegradable polymer material. The biodegradable high molecular weight copolymer can be used as environmentally friendly polymer materials such as textile fibers or plastics. Background technique [0002] A class of important biodegradable and biocompatible aliphatic polyester polymer materials can be synthesized by condensation polymerization of aliphatic dibasic acids and their derivatives and aliphatic dibasic alcohols under Lewis acid catalysis. U.S. Patent US5310782, Journal of Japan Textile Society, 1996,52,320, Polym.Degrad.Stab., 1998,59,209 reported high molecular weight polyethylene succinate (PES), polybutylene succinate A new synthesis method of alcohol ester (PBS) and polybutylene adipate (PBA), wherein PBS ...

Claims

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Application Information

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IPC IPC(8): C08G63/16C08G63/78C08L67/00D01F6/62
Inventor 俞建勇曹阿民李发学王学利程隆棣李婷婷
Owner DONGHUA UNIV
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