含TLCP的PET共混纤维结构和性能  

STRUCTURE AND PROPERTIES OF PET BLEND FIBERS CONTAINING TLCP

作　　者：潘利华[1] 梁伯润[1] 

机构地区：[1]中国纺织大学高分子材料系

出　　处：《合成纤维工业》1997年第1期27-30,53,共5页China Synthetic Fiber Industry

基　　金：国家自然科学基金

摘　　要：以热致性液晶共聚酯——聚对苯二甲酸乙二酯／对羟基苯甲酸（ＰＥＴ／ＰＨＢ）作为添加剂与ＰＥＴ共混纺丝，研究该ＰＥＴ／ＴＬＣＰ（热致性液晶高聚物）共混物的可纺性，并用ＤＳＣ、Ｘ光衍射、声速和应力－应变等方法对纤维的热性能、结晶和取向结构以及力学性能进行了表征。结果表明，ＴＬＣＰ质量含量为５％左右的ＰＥＴ共混物可纺性良好。ＴＬＣＰ对ＰＥＴ从熔体结晶具有阻止作用，共混初生纤维的玻璃化转变和冷结晶温度均因ＴＬＣＰ的存在而升高。ＴＬＣＰ质量含量为５％的共混物纤维结晶结构与纯ＰＥＴ纤维相似，但晶粒尺寸较小，且晶粒尺寸大小与共混物组成、喷丝头拉伸比和后拉伸比有关。ＴＬＣＰ含量增加，共混纤维取向度和模量增大，而强度下降，但后拉伸可使纤维强度有较大的提高。oly(ethylene terephthalate co p oxybenzoate)(PET/PHB) was added to PET to form PET blend fibers. The spinnability is good for 95 PET/5 TLCP composition. DSC melting and crystallization results show that the crystallization of PET is delayed by the addition of TLCP. Results of WAXD for drawn blend fibers show the similarity of crystalline element in virgin PET to that in 95 PET/5 TLCP and that the crystallite size depends on the blend composition, spinning ratio and drawing ratio. The orientation degree, and hence the modulus of as spun blend fibers,increases with the amount of TLCP. Whereas the their tenacity decreases somewhat.

关 键 词：PET 共混纤维 结晶 热性能 液晶高聚物 聚酯纤维 

分 类 号：TQ342.92[化学工程—化纤工业]