Biodegradable polyester elastomer and preparation method thereof

A biodegradable polyester and elastomer technology, applied in the field of polymer materials, can solve the problems of difficult to achieve multi-component effective copolymerization, thermal degradation, low product molecular weight, insufficient esterification rate, etc., to reduce thermal degradation and crossover The effects of side effects, high biodegradability, and low content

Active Publication Date: 2020-05-05
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to solve the problem that it is difficult to realize multi-component effective copolymerization and serious thermal degradation when IHDCA or IHDXC is used to prepare biodegradable polyester elastomers in the prior art, and to provide a biodegradable polyester elastomer based on IHDCA or IHDXC Polyester elastomer and its preparation method
The present invention realizes multi-component high-efficiency copolymerization by regulating the process conditions of comonomer esterification or transesterification reaction, and effectively solves the problem of severe thermal degradation of IHDCA or IHDXC at high temperature and the problem of fatty dibasic alcohol and fatty dibasic acid or aromatic dibasic carboxylic acid Due to low reaction temperature and insufficient esterification rate, the molecular weight of the product is not high

Method used

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  • Biodegradable polyester elastomer and preparation method thereof
  • Biodegradable polyester elastomer and preparation method thereof
  • Biodegradable polyester elastomer and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0039] A kind of biodegradable polyester elastomer, its preparation process is as follows:

[0040] (1) The first stage reaction: using 1,4-butanediol, terephthalic acid and adipic acid as raw materials, adding phosphoric acid and antioxidant 1010 at the same time, under the temperature of 190°C and under the action of tetrabutyl titanate Esterification for 2 hours, followed by prepolymerization for 0.5 hours at a pressure of 0.05 mbar and a temperature of 200° C., wherein the ratio of the molar weight of 1,4-butanediol to the sum of the molar weights of terephthalic acid and adipic acid is 1.1: 1. The ratio of the molar weight of tetrabutyl titanate to the sum of the molar weights of terephthalic acid and adipic acid is 50ppm, and the addition amounts of phosphoric acid and antioxidant 1010 are 1,4-butanediol and terephthalic acid respectively 0.1% and 0.2% of the sum of mass of adipic acid;

[0041] (2) The second stage reaction: take the first stage product, IIDCA, 1,4-but...

Embodiment 2

[0057] A kind of biodegradable polyester elastomer, its preparation process is as follows:

[0058] (1) The first-stage reaction: using 1,4-butanediol, terephthalic acid and suberic acid as raw materials, adding phosphoric acid and antioxidant 1010 at the same time, at a temperature of 190 ° C and the effect of tetrabutyl titanate Under the conditions of esterification for 2 hours, prepolymerization for 0.5 hours under the pressure of 100mbar and temperature of 200°C, the ratio of the molar weight of 1,4-butanediol to the sum of the molar weights of terephthalic acid and suberic acid is 1.1 : 1, the ratio of the molar weight of tetrabutyl titanate to the sum of the molar weight of terephthalic acid and suberic acid is 50ppm, and the addition amount of phosphoric acid and antioxidant 1010 is respectively 1,4-butanediol, terephthalic acid 0.1% and 0.2% of the mass sum of dicarboxylic acid and suberic acid;

[0059] (2) The second-stage reaction: using the first-stage product, I...

Embodiment 3

[0066] A kind of biodegradable polyester elastomer, its preparation process is as follows:

[0067] (1) The first stage reaction: 1,3-propanediol, dimethyl isophthalate and dimethyl malonate are used as raw materials, and phosphorous acid (heat stabilizer) and antioxidant 1076 are added at the same time, at a temperature of 215°C Esterification under the condition of tetraisopropyl titanate for 2.5h, followed by prepolymerization at 0.7mbar pressure and temperature of 220°C for 1h, wherein the molar amount of 1,3-propanediol is equal to that of dimethyl isophthalate The ratio of the molar weight of tetraisopropyl titanate to the sum of the molar weights of dimethyl malonate and dimethyl malonate is 1.2:1, and the ratio of the molar weight of tetraisopropyl titanate to the sum of the molar weights of dimethyl isophthalate and dimethyl malonate The amount of phosphorous acid and antioxidant 1076 added is 0.3% and 0.1% of the sum of the mass of 1,3-propanediol, dimethyl isophthal...

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Abstract

The invention relates to a preparation method of a biodegradable polyester elastomer. The method comprises the following steps: firstly, taking A1, B1 and B2 as raw materials, and carrying out first-stage reaction under the action of a first catalyst under a high-temperature condition; taking the first-stage product, a rigid monomer, A2 and citric acid as raw materials, carrying out a second-stagereaction under a low-temperature condition and under the action of a second catalyst, and finally carrying out a condensation polymerization reaction to obtain the biodegradable polyester elastomer.The first-stage reaction and the second-stage reaction are esterification or transesterification; the tensile strength of the finally prepared elastomer is 12.8-34.5 MPa, the elongation at break is 380-700%, and the mass loss after the elastomer is cultured for 30 days in a 37 DEG C lipase solution is 6-14%. The problems that IHDCA or IHDXC is degraded seriously and polyester network type elastomers are difficult to degrade are solved, and the method can be applied to toughening modification of brittle biodegradable polyester such as PHA and PLA and in-vivo soft tissue engineering.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and relates to a biodegradable polyester elastomer and a preparation method thereof. Background technique [0002] In recent years, with the increasing emphasis on environmental protection around the world, the development and utilization of degradable polymer materials has attracted widespread attention of researchers. At present, degradable polymer materials, especially biodegradable polymer materials, have become a research hotspot in the field of biomaterials. [0003] According to the chemical structure and whether it has repeated processing, polymer materials can be divided into two categories: thermoplastic and thermosetting. The former is easy to process and shape in the molten state, and the leftovers, defective products and products generated during the processing process are recycled. , can be reused, so thermoplastic degradable polymers have become a new type of polymer mat...

Claims

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Application Information

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IPC IPC(8): C08G63/42C08G63/83C08G63/85
CPCC08G63/42C08G63/83C08G63/85
Inventor 乌婧林一鸣王华平陈咏
Owner DONGHUA UNIV
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