Effect of Curing Poly( p -Phenylene Sulfide) on Thermal Properties and Crystalline Morphologies

Effect of Curing Poly( p -Phenylene Sulfide) on Thermal Properties and Crystalline Morphologies
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固化聚对苯硫醚对热性能和晶体形貌的影响

DOI：
10.4236/aces.2013.32017
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发表时间：
2013
期刊：
Advances in Chemical Engineering and Science
影响因子：
--
通讯作者：
B. Ku
B. Ku
中科院分区：
--
文献类型：
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作者：
Sungho Lee;Do;Jae;Min Park;Han‐Ik Joh;B. Ku

文献摘要

被引文献

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商业聚对亚苯基 硫化物）（PPS）进行热固化，导致分子的增加 由于交联而产生的重量。样品的非等温结晶研究 在 250°C 下固化长达 7 天，表现出结晶的单调增加 与纯 PPS 相比的温度。然而，进一步增加固化时间会降低 结晶温度。半结晶时间（t1/2）的变化与 结晶温度。因此，PPS 的交联受到影响 结晶行为显着。对某一 在一定程度上，交联起到了成核剂的作用，但过度的交联 阻碍结晶。偏光观察形貌 显微镜检查表明，热固化仅需 1 天即可 具有较小尺寸的球晶结构，这是未观察到的 纯PPS。
Commercial poly(p-phenylene sulfide) (PPS) was thermally cured, which resulted in an increase of molecular weight due to cross-linking. Non-isothermal crystallization studies of samples cured for up to 7 days at 250?C showed a monotonous increase of crystallization temperature compared to pure PPS. However, a further increase of curing time decreased the crystallization temperature. The change in the half-crystallization time (t1/2) was similar to the crystallization temperature. Thus, the cross-linking of PPS affected crystallization behaviors significantly. To a certain extent, crosslinks acted as nucleation agents, but excessive cross-linking hindered the crystallization. Morphologies observed by polarized optical microscopy suggested that thermal curing for as little as 1 day contributed to the spherulitic structure having a smaller size, that was not observed with pure PPS.