Direct Formation of Isotactic Poly(1-butene) Form I Crystal from Memorized Ordered Melt
Direct Formation of Isotactic Poly(1-butene) Form I Crystal from Memorized Ordered Melt
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由记忆有序熔体直接形成全同立构聚（1-丁烯）I型晶体
DOI：
10.1021/ma400952r
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发表时间：
2013-09
期刊：
影响因子：
5.5
通讯作者：
Liangbin Li
中科院分区：
文献类型：
--
作者：
Youxin Ji;Zhen Wang;Zeming QI;Liangbin Li
同骨多丁烯-1（IPB-1）的记忆有序熔体（MOM）的结晶，并使用原位傅立叶转化红外微光谱成像以及宽和小角度X射线散射进行了结晶。在高处部分融化后
Crystallization from memorized ordered melt (MOM) of isotactic polybutene-1 (iPB-1) is investigated with in situ Fourier transformation infrared microspectroscopic imaging and wide- and small-angle X-ray scattering. After being partially melted at high temperature, a small portion of form I crystal of iPB-1 recovers back when the temperature is lowered. This is different from a disordered melt, which crystallizes into form II directly. The recovery of form I crystal is attributed to the presence of MOM, which may keep the conformation order of form I crystal. Experimental evidence show that MOM possesses three characteristics, namely: (i) associating with the preserved form I; (ii) occupying only a small portion of the melt in the partially melted sample; (iii) being stable at high temperature. All this experimental evidence suggests that MOM locates at the boundary of crystal and melt. This is in line with the physical picture of nonclassical nucleation and growth theory or the multistage approach, where...
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