Construction and characterization of [1,6-di(N-carbazolyl)2,4-hexadiyne] diacetylene polymer bicrystals
Construction and characterization of [1,6-di(N-carbazolyl)2,4-hexadiyne] diacetylene polymer bicrystals
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[1,6-二(N-咔唑基)2,4-己二炔]二乙炔聚合物双晶的构建与表征
DOI：
10.1021/ma950792v
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发表时间：
1996
期刊：
影响因子：
--
通讯作者：
David C. Martin
中科院分区：
文献类型：
--
作者：
J. Liao;David C. Martin
我们已经开发了一些方案来构建和表征延伸链共轭聚合物中单个晶界缺陷的微观结构和宏观性质。我们的方法是取[1，6-二(N-咔唑基)-2，4-己二炔](DCHD)二乙炔单体晶体，在特定的边界条件下引入单一缺陷。从前驱体单晶中切割出两个单体种子晶体，然后将它们紧密地放在一起。通过缓慢蒸发DCHD溶液的重结晶步骤生成单体双晶体。然后，单体双晶体通过热能或暴露在高能辐射下转化为聚合物双晶体。我们发现，在固相反应后，晶体之间保持粘性界面的能力是它们的相对取向偏差和聚合方法的敏感函数。一般情况下，小角度晶界保持不变，而大角度晶界在变形后发生断裂。
We have developed schemes to construct and characterize the microstructure and macroscopic properties of individual grain boundary defects in extended-chain, conjugated polymers. Our approach has been to take [1,6-di(N-carbazolyl)-2,4-hexadiyne] (DCHD) diacetylene monomer crystals and introduce a single defect under specified boundary conditions. Two monomer seed crystals are cut from a precursor single crystal and then brought into close proximity with one another. Monomer bicrystals are created by a recrystallization step involving slow evaporation of a DCHD solution. The monomer bicrystals are then converted into polymer bicrystals through thermal energy or by exposure to high-energy radiation. We have found that the ability to retain a cohesive interface between the crystals after the solid-state reaction is a sensitive function of their relative misorientation and the method of polymerization. In general, small-angle grain boundaries remain intact, while large-angle grain boundaries are broken after ...