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首页> 外文期刊>Journal of Applied Polymer Science >Mesomorphic properties of cholesteric side-chain liquid crystalline polysiloxanes and elastomers
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Mesomorphic properties of cholesteric side-chain liquid crystalline polysiloxanes and elastomers

机译：胆甾型侧链液晶聚硅氧烷和弹性体的介晶性质

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摘要

A series of crosslinked liquid crystalline polymers and corresponding uncrosslinked liquid crystalline polymers were prepared by graft copolymerization. Their liquid crystalline properties were characterized by differential scanning calorimetry, polarizing optical microscopy, and X-ray diffraction measurements. The results showed that the crosslinking obtained in the isotropic state and the introduction of nonmesogenic crosslinking units into a polymeric structure could cause additional reduction of the clearing point (T-i) of the crosslinked polymers, compared with the corresponding uncrosslinked polymers. The crosslinked polymers (P-2-P-4) with a low crosslinking density exhibited cholesteric phases as did the uncrosslinked polymers. In contrast, a high crosslinking density made the crosslinked polymer P-5 lose its thermotropic liquid crystalline property. (C) 2003 Wiley Periodicals, Inc. [References: 18]
机译：通过接枝共聚制备一系列交联的液晶聚合物和相应的未交联的液晶聚合物。它们的液晶性质通过差示扫描量热法，偏振光学显微镜法和X射线衍射测量来表征。结果表明，与相应的未交联的聚合物相比，在各向同性状态下获得的交联以及在聚合物结构中引入非介晶交联单元可能导致交联聚合物的透明点（T-i）进一步降低。具有低交联密度的交联聚合物（P-2-P-4）与未交联聚合物一样表现出胆甾相。相反，高交联密度使交联聚合物P-5失去其热致液晶性能。 （C）2003 Wiley Periodicals，Inc. [参考：18]

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