Simultaneous SAXS and WAXS Study on Guest Exchange Process of Syndiotactic Polystyrene: Crystalline Complex Formation with Triethylene Glycol Dimethyl Ether
Simultaneous SAXS and WAXS Study on Guest Exchange Process of Syndiotactic Polystyrene: Crystalline Complex Formation with Triethylene Glycol Dimethyl Ether
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间规聚苯乙烯客体交换过程的SAXS和WAXS同步研究：与三甘醇二甲醚形成结晶络合物
DOI：
10.1002/macp.201300001
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
G. Kimura,
中科院分区：
文献类型：
--
作者：
F. Kaneko;N. Seto;K. Sasaki;S. Sakurai;G. Kimura,
间规聚苯乙烯 (sPS) 与多种化合物形成共晶。在一定条件下，客体分子可以很容易地被其他种类的分子取代。接触液体三甘醇二甲醚 (TEGDME) 后，客体交换过程随后进行时间分辨同步小角度和广角 X 射线散射，以阐明分子水平和高阶结构的结构变化。研究表明，从原始客体氯仿到新客体 TEGDME 的交换主要发生在一定的孵育时间后，与层状周期的膨胀同时进行。还研究了在此过程中 ϵ 共晶的出现以及氯仿用量对孵育时间的影响。
Syndiotactic polystyrene (sPS) forms cocrystals with a variety of chemical compounds. The guest molecules can be easily replaced with other kinds of molecules under certain conditions. The guest‐exchange process, on exposure to liquid triethylene glycol dimethyl ether (TEGDME), is followed by time‐resolved simultaneous small‐angle and wide‐angle X‐ray scattering to clarify the structure changes in molecular‐level and higher‐order structures. It is clarified that the exchange from the original guest chloroform to the new guest TEGDME takes place mainly after a certain incubation time, in parallel with the expansion of the lamellar period. The occurrence of the ϵ cocrystal during this process and the influence of the amount of chloroform on the incubation time are also studied.