Analysis of the degree of crystallinity in interpenetrating spherulites of poly(ethylene succinate) and poly(ethylene oxide) blends using pulsed NMR
Analysis of the degree of crystallinity in interpenetrating spherulites of poly(ethylene succinate) and poly(ethylene oxide) blends using pulsed NMR
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DOI：
10.1038/pj.2015.1
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发表时间：
2015-05
期刊：
影响因子：
2.8
通讯作者：
T. Ikehara;D. Ito;Toshiyuki Kataoka
中科院分区：
文献类型：
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作者：
T. Ikehara;D. Ito;Toshiyuki Kataoka
利用脉冲核磁共振技术研究了聚丁二酸乙二酯（PES）/聚环氧乙烷（PEO）共混物中互穿球晶的结晶度（φ）。PES的φ值随PEO的共混而增加，当结晶温度低于~ 65 ℃时，φ值与共混物的组成略有关系。然而，PEO的φ随共混物中PES含量的增加而单调减小，并依赖于共混物的组成。基于分子输运随共混物组合物冻结的温度变化，讨论了φ的组成依赖性。在确定φ时，考虑了仅与PEO相关的二次结晶的影响。共混物中两种组分的晶体量主要取决于共混物的组成。
The degree of crystallinity (φ) in interpenetrating spherulites, whereby spherulites of one component continue to grow inside those of the other component, was examined for the blends of poly (ethylene succinate)(PES) and poly (ethylene oxide)(PEO) using pulsed nuclear magnetic resonance. The value of φ for PES increased with PEO blending and was slightly dependent on the blend composition when crystallized below~ 65 C. However, φ for PEO monotonically decreased with the PES content in the blends and was dependent on the blend composition. The composition dependence of φ is discussed based on the change in temperature at which the molecular transport is frozen with the blend composition. The effect of secondary crystallization, which is only relevant for PEO, was taken into account when determining φ. The amount of crystals of both constituents in the blends primarily depended on the blend composition.