PREPARATION AND CHARACTERIZATION OF AMORPHOUS POLY(ETHYLENE TEREPHTHALATE)

SU Chenyu; ZHANG Guangli; ZHANG Hongzhi

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PREPARATION AND CHARACTERIZATION OF AMORPHOUS POLY(ETHYLENE TEREPHTHALATE)

Research Article | 更新时间：2021-03-19

- PREPARATION AND CHARACTERIZATION OF AMORPHOUS POLY(ETHYLENE TEREPHTHALATE)
- Acta Polymerica Sinica Issue 2, Pages: 232-237(2001)
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- Published：20 April 2001，
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SU Chenyu, ZHANG Guangli, ZHANG Hongzhi. PREPARATION AND CHARACTERIZATION OF AMORPHOUS POLY(ETHYLENE TEREPHTHALATE). [J]. Acta Polymerica Sinica (2):232-237(2001)
DOI：

SU Chenyu, ZHANG Guangli, ZHANG Hongzhi. PREPARATION AND CHARACTERIZATION OF AMORPHOUS POLY(ETHYLENE TEREPHTHALATE). [J]. Acta Polymerica Sinica (2):232-237(2001) DOI：

摘要

通过单体酯交换法和聚2

6-萘二甲酸乙二酯 (PEN)与低分子量PET酯交换的方法分别合成了一系列NPA/TPA/EG和IPA/TPA/EG共聚酯 .随着NPA或IPA单元含量的增加

等温结晶速度迅速降低

共聚物的结晶性降低甚至非晶化 .由NMR分析得知单体酯交换法与聚合物酯交换法得到的共聚酯NPA/TPA/EG序列分布相近

链结构都接近完全无规 .由DSC结果分析

随共聚单体含量的增加

熔点和熔融热降低

结晶度也随之降低 .当NPA或IPA含量达到20%时

可以得到非晶的共聚酯 (APET) .本文还对共聚物组成与结晶温度的关系进行了表征.

Abstract

Copolyesters based upon ethylene glycol (EG)

terephthalic acid (TPA) and 2

6-naphthalenedicarhoxylic acid(NPA) or isophthalie acid(IPA) of different composition were synthesized by transesterification polycondensation of monomers or polymers．With the involvement of IPA or NPA moieties in the chains

the copolyesters became less crystallizable or amorphous

and the isothermal crystal growth rate decreased rapidly．Tlhe H1-NMR studies of the copolyesters NPA／TPA／EG showed that the samples prepared by different method exhibited a similar random sequence distribution．DSC measurements indicated that the copolyesters NPA/TPA／EG or IPA／TPA／EG are amorphous if the contents of moieties NPA of IPA are higher or equal to 20 mol％．The WAXD of the copolyester sample containing 20 mol％ NPA moieties

after an anneal at 140℃ for 2 hours

exhibited some weak diffraction peak．which is attributed to the crystals of PET moiety in the eopolyester．Due to the introduction of IPA or NPA moieties

the melting temperatures and the cooling crystallization temperatures of the copolyesters were changed．

关键词

非晶PET共聚酯间苯二甲酸26萘二甲酸序列分布

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Center for Degradable and Flame-Retardant Polymeric Materials, College of Chemistry,State Key Laboratory of Polymer Materials Engineering, National Engineering Laboratory of Eco-Friendly Polymeric Materials Sichuan, Sichuan University

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