STRUCTURE DEVELOPMENT OF POLYETHYLENE TEREPHTHALATE FIBERS DURING POSTSPINNING ANNEALING

被引:16
作者
CHANG, H [1 ]
LEE, KG [1 ]
SCHULTZ, JM [1 ]
机构
[1] UNIV DELAWARE,MAT SCI PROGRAM,NEWARK,DE 19716
来源
JOURNAL OF MACROMOLECULAR SCIENCE-PHYSICS | 1994年 / B33卷 / 01期
关键词
D O I
10.1080/00222349408248082
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
The fast structure development process in the early stage of crystallization in commercial polyethylene terephthalate (PET) fibers during carefully controlled postspinning annealing treatments has been followed. In addition to conventional structure characterization techniques, transmission electron microscopy (TEM) has been employed to probe the sequence of structural events. In the earliest stage of structural development, direct observation showed an embryonic microfibrillar structure, the microfibril diameter being ca. 5 nm. Upon modest heat treatment, the microfibrils become axially punctuated with crystallites. As further crystallization occurs, the crystallites become more perfect and lateral alignment of crystallites takes place, particularly in extensively crystallized materials, that is, higher temperature and/or longer time of heat treatment. The lateral alignment results finally in a lamellar microstructure.
引用
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页码:105 / 127
页数:23
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