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Amorphous copolyester and preparation method thereof

A technology of amorphous copolyester, applied in the field of amorphous copolyester and its preparation, can solve the problems of PLA's poor thermal stability, heavy processing odor, narrow processing window, etc., and achieve good dimensional stability of the product, Simple production process and good dimensional stability

Active Publication Date: 2017-06-20
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

ABS processing has a heavy odor and is easy to deform during extrusion processing
PLA has poor thermal stability, narrow processing window, slow crystallization rate and poor toughness

Method used

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  • Amorphous copolyester and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 1.0 moles of terephthalic acid, 1.0 moles of isophthalic acid, 1.1 moles of ethylene glycol, 1.2 moles of 1,4-butanediol and 0.5% (accounting for the total mass of dibasic acid and dibasic alcohol) catalyst tetrabutyl titanate Put it into the three-necked flask, under the protection of nitrogen atmosphere, put it in an oil bath and heat it up: 120°C for 0.5 hours, 160°C for 1 hour, 220°C for 3 hours, until no liquid flows out, and the mixture in the reaction system becomes clear Cool down, add 1% (accounting for the total mass of dibasic acid and dibasic alcohol) catalyst tetrabutyl titanate and 0.01% (accounting for the total mass of dibasic acid and dibasic alcohol) of stabilizer trimethyl phosphate under the protection of nitrogen atmosphere Esters, stir quickly to disperse the catalyst evenly; then vacuumize to 50Pa, polycondense at 250°C for 5 hours until the polymer climbs the pole; discharge to obtain the product.

[0037] The intrinsic viscosity of the copolyest...

Embodiment 2

[0040] Add 1.0 moles of terephthalic acid, 1.0 moles of furandicarboxylic acid, 1.4 moles of ethylene glycol, 1.2 moles of 1,4-butanediol and 1% (accounting for the total mass of dibasic acid and dibasic alcohol) catalyst tetrabutyl titanate In the three-necked flask, under the protection of a nitrogen atmosphere, place it in an oil bath and heat it up: 120°C for 0.5 hours, 160°C for 1 hour, 220°C for 3 hours, until no liquid flows out, and the mixture in the reaction system becomes clear; Lower the temperature, add 1% (accounting for the total mass of dibasic acid and dibasic alcohol) catalyst tetrabutyl titanate and 0.05% (accounting for the total mass of dibasic acid and dibasic alcohol) of stabilizer trimethyl phosphate under the protection of nitrogen atmosphere , stir rapidly to disperse the catalyst evenly; then vacuumize to 50Pa, react at 250°C for 5 hours until the polymer climbs the pole; discharge to obtain the product.

[0041] According to the DSC test, the copoly...

Embodiment 3

[0044] 1.0 moles of terephthalic acid, 1.0 moles of isophthalic acid, 1.5 moles of 1,3-propanediol, 1.5 moles of 1,4-butanediol and 1% (accounting for the total mass of dibasic acid and dibasic alcohol) catalyst tetratitanate Add the butyl ester into the three-necked flask, place it in an oil bath under the protection of nitrogen atmosphere, and heat it up by program: 120°C for 0.5 hours, 160°C for 1 hour, 220°C for 3 hours, until no liquid flows out, and the mixture in the reaction system Become clarified; cool down, add 1% (accounting for the total mass of dibasic acid and dibasic alcohol) catalyst tetrabutyl titanate and 0.05% (accounting for the total mass of dibasic acid and dibasic alcohol) of stabilizer phosphoric acid under the protection of nitrogen atmosphere Trimethyl ester, stir quickly to disperse the catalyst evenly; then vacuumize to 50Pa, react at 280°C for 6 hours until the polymer climbs the pole; discharge to obtain the product.

[0045] According to the DSC...

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Abstract

The invention discloses amorphous copolyester and a preparation method thereof. The preparation method of the amorphous copolyester comprises the following steps: (1) in an inert atmosphere, carrying out an esterification reaction of at least two diacids and at least two diols under a condition of the presence of a catalyst; and (2) adding a stabilizer and a catalyst into the system after the esterification reaction in the step (1), and carrying out a polycondensation reaction under a vacuum condition to obtain the amorphous copolyester. The amorphous copolyester has the characteristic of low molding temperature; the amorphous copolyester has no melting point, the molding temperature is decided by the softening temperature, and the highest molding temperature is only about 100 DEG C. The amorphous copolyester has the characteristics of small product shrinkage percentage and good dimensional stability; and since the copolyester is amorphous, no product shrinkage problem exists, and the product dimensional stability is good.

Description

technical field [0001] The invention relates to an amorphous copolyester and a preparation method thereof, belonging to the field of copolyester material preparation. Background technique [0002] 3D printing technology is a new type of rapid precision prototyping technology. Its basic principle is laminated manufacturing, adding materials layer by layer to make three-dimensional entities. Using computer three-dimensional design, 3D printing equipment can fully automatically and accurately realize the molding of many structurally complex parts, greatly simplifying the processing procedure. At present, 3D printing technology is mainly used in mold manufacturing, biological tissue engineering, clothing, construction and other fields. [0003] Materials used in 3D printing technology include metals, ceramics and polymer materials. Among them, polymer materials have become the most important class of materials in 3D printing technology due to their advantages such as low moldi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/183C08G63/181C08G63/42C08G63/85C08G63/78
CPCC08G63/181C08G63/183C08G63/42C08G63/78C08G63/85
Inventor 郭宝华张旸徐军齐治国
Owner TSINGHUA UNIV
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