Phase transition behavior of silicone based liquid crystalline polymers

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Phase transition behavior of silicone based liquid crystalline polymers

机译：有机硅基液晶聚合物的相变行为

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Phase transition behavior of silicone based liquid crystalline (LC) polymers with variable isotropic transition temperatures (Ti), synthesized from poly(methyl hydrosiloxane), 10-undecenoic acid based crosslinking agent and cholesterol based side chain mesogen, was studied by differential scanning calorimetry (DSC), polarizing optical microscopy (POM), and X-ray diffraction (XRD) measurements. The chemical structure of the mesogenic monomer and the LC polymers were confirmed by Fourier transform infra-red (FT-IR) spectroscopy and 1HNMR spectroscopy. DSC studies showed that the glass transition temperatures (Tg) and Ti of the LC polymers decreased with increasing proportion of mesogenic crosslinking agent at its low proportion and at its higher proportion Ti disappeared completely indicating that the polymeric chains had less chance to orient in the network structure. The results were consistent with the XRD and POM studies.

机译：通过差示扫描量热法研究了由聚（甲基氢硅氧烷），10-十一碳烯酸基交联剂和胆固醇基侧链液晶元合成的具有各向同性转变温度（Ti）的有机硅基液晶聚合物的相变行为（ DSC），偏振光学显微镜（POM）和X射线衍射（XRD）测量。介晶单体和LC聚合物的化学结构通过傅立叶变换红外（FT-IR）光谱和1HNMR光谱确认。 DSC研究表明，液晶聚合物的玻璃化转变温度（Tg）和Ti随介晶交联剂比例的降低而降低，而在较低的比例下，Ti完全消失，这表明聚合物链在网络中取向的机会较小。结构体。结果与XRD和POM研究一致。

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《e-Polymers》 |2011年第1期|共页
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中图分类高分子化合物工业（高聚物工业）;
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Phase transition behavior of silicone based liquid crystalline polymers

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