Polymerization in non-aqueous lyotropic liquid crystals: Influence of the unsaturation site

Stig E. Friberg , Bing Yu , Ahsan U. Ahmed , Gregory A. Campbell
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引用次数: 9

Abstract

Two surfactants, bis[2-(dodecyloxycarbonyl)ethyl](p-vinylbenzoyl)methylammonium chloride (SI) and bis[2-(10-undecenoyloxycarbonyl)ethyl](p-methylbenzoyl)methylammonium chloride (SII) were synthesized and copolymerized with polar and non-polar monomers to form regularly layered structures.

The results showed a pronounced difference between the two surfactants. SI with the double bond close to the polar group accepted a large number of monomers, in contrast to the behavior of SII. For SI the polymerization changed the conformation of the p-vinylbenzoyl group depending on the location of the added monomer while copolymerization of the monomers with SII gave no significant change.

A comparison with earlier results from bis[2-(10-undecenoyloxycarbonyl)ethyl](p-vinylbenzoyl)methylammonium chloride provided proof of copolymerization of all the groups.

非水溶性液晶中的聚合:不饱和位点的影响
合成了双[2-(十二烷基氧羰基)乙基](对乙烯基苯甲酰)甲基氯化铵(SI)和双[2-(10-十一烷基氧羰基)乙基](对甲基苯甲酰)甲基氯化铵(SII)两种表面活性剂,并与极性和非极性单体共聚形成规则的层状结构。结果表明两种表面活性剂之间有明显的差异。具有靠近极性基团的双键的SI接受了大量的单体,与SII的行为相反。对于SI,聚合改变了对乙烯基苯甲酰基团的构象,这取决于添加的单体的位置,而单体与SII的共聚没有明显的变化。与先前的[2-(10-十一烯氧羰基)乙基](对乙烯基苯甲酰)甲基氯化铵的结果进行比较,证明了所有基团的共聚。
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