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首页> 外文期刊>Journal of Applied Polymer Science >Studies on Fibers Spun from Poly(vinyl alcohol-b-acrylonitrile) Emulsions Prepared by Ultrasonic Technique.I.Characterization of Fiber structure
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Studies on Fibers Spun from Poly(vinyl alcohol-b-acrylonitrile) Emulsions Prepared by Ultrasonic Technique.I.Characterization of Fiber structure

机译：超声法制备聚乙烯醇-b-丙烯腈乳化液纺制纤维的研究I.纤维结构表征

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摘要

The structural characteristics of poly(vinyl alochol-b-acrylonitrile) fibers with differnet AN contents were studied by comparison with that of PVA and PAN fibers. X-ray diffraction analysis showed that both PVA and PAN blocks in the copolymer fibers formed crystals. Two glass transition temperatures corresponding to PVA and PAN components appeared on the dynamic mechanical spectrum of the copolymer fiber, indicative of their incompatibility in the fiber. SEM intuitively exhibited a longitudinal cracked and grooved surface morphology similar to that of PAN fiber and revealed an internal microdomain separation morphology for hte block copolymer fibers. TEM showed a morphological structure intermediate between thsoe of PVA and PAN fibers for the block copolymer fibers. It was also found that the copolymer fiber with the lower AN content has a sheath-core structure.
机译：通过与PVA和PAN纤维的比较，研究了具有不同AN含量的聚乙烯醇（Alochol-b-丙烯腈）纤维的结构特征。 X射线衍射分析表明，共聚物纤维中的PVA和PAN嵌段均形成晶体。对应于PVA和PAN组分的两个玻璃化转变温度出现在共聚物纤维的动态机械光谱上，表明它们在纤维中不相容。 SEM直观地显示出与PAN纤维相似的纵向裂纹和沟槽表面形态，并揭示了嵌段共聚物纤维的内部微区分离形态。 TEM显示出嵌段共聚物纤维在PVA和PAN纤维之间的形态结构中间。还发现具有较低AN含量的共聚物纤维具有皮芯结构。

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