A Main-Chain de Vries Smectic Liquid Crystal Polymer Prepared by Hoveyda-Grubbs Catalyst Initiated Acyclic Diene Metathesis Polymerization

被引：9

作者：

Walba, David M. ^{[1
]}

Yang, Hong ^{[1
]}

Keller, Patrick ^{[1
,2
]}

Zhu, Chenhui ^{[3
]}

Shao, Renfan ^{[3
]}

Coleman, David A. ^{[3
]}

Jones, Christopher D. ^{[3
]}

Clark, Noel A. ^{[3
]}

机构：

[1] Univ Colorado, Dept Chem & Biochem, Boulder, CO 80309 USA

[2] CNRS, UMR 168, Inst Curie, Ctr Rech, F-75248 Paris 05, France

[3] Univ Colorado, Dept Phys, Boulder, CO 80309 USA

来源：

MACROMOLECULAR RAPID COMMUNICATIONS | 2009年 / 30卷 / 22期

基金：

美国国家科学基金会;

关键词：

catalysis; fibers; liquid-crystalline polymers (LCP); phase behavior; synthesis; MESOGENIC 4,4-BIPHENYLDICARBOXYLATE UNIT; DIFFUSE-CONE-MODEL; CROSS-METATHESIS; RUTHENIUM; POLYESTERS; GENERATION; MICROTOME; DESIGN; PHASE;

D O I：

10.1002/marc.200900249

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

A main-chain liquid crystalline polymer has been obtained by applying a Hoveyda-Grubbs 2nd generation catalyst in acyclic diene metathesis polymerization (ADMET) of a monomer containing on one end a terminal dimethylvinylsilyl group and at the other end a terminal C-C double bond. This material showed an interesting Iso-de Vries SmA* - SmC* - Glass phase transition with a very small layer shrinkage on progressing from the SmA* phase into the SmC* phase. Will this material present a helical structure along the fiber axis in the SmC* temperature range? Several physical characterization methods including XRD, optical observation, and microtome technique have been used to investigate the internal structural organization in this liquid crystalline fiber.

引用

页码：1894 / 1899

页数：6