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A new series of acrylates with the same mesogens containing thioester as bridge-bondwere synthesized, and the acrylates were characterized by H~1 NMR, IR and MS. Thepolymers were obtained by radical polymerization using AIBN as initiator. The monomersand polymers exhibit thermotropic-enantiotropic liquid crystalline behavior. 相似文献
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new series of sulfur-contalning side chain liquid crystalline polymers were described. Mesomorphic side chains with methylene spacer in different length have been synthesized and their structures were identified by NMR, IR and MS.The liquid crystalline nature of the polymers was characterlzed by microscopy.The Polymers have liquid crystalline nature. 相似文献
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Four new paranmeters, and , and have been proposed to describe the average length of the sequence of substituted anhydroglucose units and that of unsubstituted ones respectively along the CMC chain. The methods for determining those parameters have also been presented . Six CMC samples have been characterized in terms of intrinsic viscosity, degree of substitution (DS), index of substitution(SI)_ and . It has been proved experimentally that, not only can describe the sequence distribution along the CMC chain, but also can be used for calculating SI and estimating the average degree of substitution in the substituted glucose rings. 相似文献
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教育部举办的全国高等学校高分子化学与物理教学讨论班于1982年12月1至15日在广州举行。这是解放以来该学科的第一次全国性教学学术讨论会。目的是交流高分子化学与物理课程的教学经验,讨论 相似文献
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聚硅氧烷侧链高分子液晶的合成 总被引:6,自引:1,他引:5
合成了烯丙氧基苯甲酸对苯二酚酯的衍生物,用NMR及MS对其结构进行了鉴定。 相似文献
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new series of sulfur-containing side chain liquid crystalline polymerswere described. Mesomorphic side chains with different terminal groups have beensynthesized and their structures were identified by NMR, FTIR and MS. The polymers have liquid crystalline nature 相似文献
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