Dilute solution behavior and chain-stiffness of a chiral mesogen-jackted liquid crystal polymer

Junge Zhi*, Anhua Liu, Zhiguo Zhu, Xiaocun Lü, Xinghe Fan, Xiaofang Chen, Xinhua Wan, Qifeng Zhou

*此作品的通讯作者

科研成果: 期刊稿件文章同行评审

9 引用 (Scopus)

摘要

A series of optically active mesogen-jacketed liquid crystal polymers with narrow polydispersities (P-1 - P-6) were studied by a combination of static and dynamic laser light scattering techniques and viscosity measurements in THF at 25°C. It is found that THF is a good solvent for the polymers studied. The dependences of the intrinsic viscosity [η] and root mean-square radius of gyration 〈R g 2z 1/2 of the polymers on weight-average molecular weight M̄ w are [η] = (2.75 ± 0.05) × 10 -3w 0.78 ± 0.02 and 〈R g 2z 1/2 = (1.53 ± 0.04) × 10 -2w 0.60 ± 0.01, respectively, in THF at 25°C. According to Bohdanecky-Bushin's method based on Yamakawa-Fujii- Yoshizaki's theory for worm-like chain cylinders, the molar mass per unit contour length M L and the persistence length q were estimated to be (29.8 ± 1.0) × 10 2 nm and (15.4 ± 3.0) nm, respectively. The values of the exponent α of Mark-Houwink-Sakurada equation and q indicate that these liquid crystal polymers of the side-chain type have an extended conformation in dilute solutions as most main-chain liquid crystal polymers.

源语言英语
页(从-至)774-778
页数5
期刊Acta Polymerica Sinica
5
出版状态已出版 - 10月 2005
已对外发布

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