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	非晶聚对苯二甲酸乙二酯的制备与表征; Preparation and characterization of amorphous poly(ethylene terephthalate)
	苏辰宇 ; 张广利 ; 张鸿志
	2001
关键词	非晶PET 共聚酯 间苯二甲酸 6萘二甲酸 序列分布 2 amorphous poly(ethylene terephthalate) copolyester isophthalic acid 2,6-naphthalenedicarboxylic acid sequence distribution
英文摘要	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 2 0 %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; Copolyesters based upon ethylene glycol (EG), terephthalic acid (TPA) and 2, 6-naphthalenedicarboxylic acid(NPA) or isophthalic 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. The H-1-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 degreesC for 2 hours, exhibited some weak diffraction peak, which is attributed to the crystals of PET moiety in the copolyester. Due to the introduction of IPA or NPA moieties, the melting temperatures and the cooling crystallization temperatures of the copolyesters were changed.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000171044400021&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; SCI(E); 中文核心期刊要目总览(PKU); 中国科学引文数据库(CSCD); 0; 02; 232-237
语种	中文
出处	万方 ; 知网 ; SCI
出版者	高分子学报
内容类型	其他
源URL	[http://hdl.handle.net/20.500.11897/80346]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	苏辰宇,张广利,张鸿志. 非晶聚对苯二甲酸乙二酯的制备与表征, Preparation and characterization of amorphous poly(ethylene terephthalate). 2001-01-01.

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