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High molecular weight degradation polymer and preparation method thereof

A technology for degrading polymers and high molecular weight, applied in the field of materials, can solve the problems of mechanical properties and processing properties of a single degradable resin, and achieve the effect of excellent comprehensive performance

Active Publication Date: 2007-10-17
马鞍山同杰良生物材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method of improving heat resistance by blending non-degradable aromatic polyesters has certain limitations in terms of compatibility and degradation.
[0011] In addition to heat resistance, a single degradable resin also has many deficiencies in other physical and mechanical properties, processing properties, etc., which need to be improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Add 60 moles of lactide, 10 moles of terephthalic acid, and 10 moles of 1,4-butanediol into the reactor, and react for 1.5 hours at a reaction temperature of 190°C under the protection of a nitrogen flow of 5 L / min; then , add 0.1 mole of tin dibromide to the reaction system, heat up to 220 ° C, and react for 18 hours under the condition of vacuum of 10 Pa to obtain a polymer with a weight average molecular weight of 192,700. The content of benzene ring monomer in the polymer is 12.5%.

Embodiment 2

[0042] Add 90 moles of lactide, 5 moles of terephthalic acid, and 5 moles of 1,4-butanediol into the reactor, and react for 1.5 hours at a reaction temperature of 190°C under the protection of a nitrogen flow of 5 L / min; then , add 0.125 moles of tin dibromide to the reaction system, raise the temperature to 220 ° C, and react for 18 hours under the condition of a vacuum of 10 Pa to obtain a polymer with a weight average molecular weight of 285,000. The content of benzene ring monomers in the polymer is 5%.

Embodiment 3

[0044] Add 20 moles of lactide, 40 moles of terephthalic acid, and 40 moles of 1,4-butanediol into the reactor, and react for 1.5 hours at a reaction temperature of 190°C under the protection of a nitrogen flow of 5 L / min; then , add 0.125 moles of tin dibromide to the reaction system, heat up to 220 ° C, and react for 18 hours under the condition of a vacuum of 10 Pa to obtain a polymer with a weight average molecular weight of 137,400. The content of benzene ring monomers in the polymer is 40%.

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Abstract

The invention relates to a macromolecule degradated polymer and its producing method belonging to material technical field. The polymer contains more than two monomers such as hydroxy acid or lactone or lactide formed by hydroxy acid, binary carboxylic acid or binary acid anhydride, aliphatic diamine or aromatic diamine, diatomic alcohol. The molecule chain of the polymer contains benzene ring. The molar ratio of the benzene ring monomer to polymer is 1-40%. The weight-average molecular weight of the polymer is more than 80000. The invention has the following process: adding the synthesis monomer material into the reaction vessel in proportion for a polymerization reaction, getting polyprotic oligomer with a certain polymeric level at 120-200 DEG C, with a vacuum degree of 10000Pa-100000Pa for 0.5-5 hours; polymerizing the polyprotic oligomer in vacuum with a vacuum degree of 1-50 Pa, at 150-300 DEG C for 10-50 hours in a catalytic environment, finally getting the target polymer. The invention can be widely used for fiber product, piece product, foaming product, injection molding product, membrane product and etc.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a degradable material in the environment, and the degradable material includes a copolymer of various monomers. The degradable material has excellent comprehensive properties and can be widely used in fiber products, sheet products, foam products, injection molding products, film products, etc. Background technique [0002] Since the beginning of the last century, plastic has gradually developed into a material widely used in various fields. Compared with the consumption of plastic in 1960, the consumption of plastic in the world increased by more than 100 times in 2000. However, due to the non-degradability of plastics, the widespread use of plastics, especially the use and disposal of plastic coverings, poses a serious threat to our ecosystem; and traditional plastic incineration produces a large amount of carbon dioxide, causing serious greenhouse effects; in add...

Claims

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Application Information

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IPC IPC(8): C08G63/08C08G63/16C08G63/123C08G63/685C08G63/85
Inventor 王秦峰张乃文任杰
Owner 马鞍山同杰良生物材料有限公司
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