Properties of highly syndiotactic poly(vinyl alcohol)

被引：54

作者：

Yoshitaka, N

Nakano, T

Okamoto, Y

Gotoh, Y

Nagura, M

机构：

[1] Nagoya Univ, Grad Sch Engn, Dept Appl Chem, Chikusa Ku, Nagoya, Aichi 4648603, Japan

[2] Nagoya Univ, Grad Sch Engn, Joint Res Ctr Precis Polymerizat,Japan Chem Innov, Chikusa Ku, Nagoya, Aichi 4648603, Japan

[3] Nara Inst Sci & Technol, Grad Sch Mat Sci, Nara 6300101, Japan

[4] Shinshu Univ, Fac Text Sci & Technol, Ueda, Nagano 3868567, Japan

来源：

POLYMER | 2001年 / 42卷 / 24期

关键词：

poly(vinyl alcohol); syndiotacticity; physical property;

D O I：

10.1016/S0032-3861(01)00493-1

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The physical proper-ties of a highly syndiotactic poly(vinyl alcohol) (PVA, diad syndiotacticity (r) = 69%) and a commercial, atactic PVA (r = 54%) were examined. The highly syndiotactic PVA was derived from poly (vinyl acetate) prepared through the radical polymerization of vinyl acetate in (CF3)(2)CHOH. The solubility, gelation behavior, melting point, and crystallization rate were drastically affected by the tacticity of the main chain. Some of the properties were measured using fiber samples prepared by the gel spinning technique. The fiber obtained from the syndiotactic PVA had a melting point of 274 degreesC. This is the highest melting point reported for PVA. These effects of tacticity on the polymer properties are ascribed to the difference in intermolecular and/or intramolecular hydrogen bonding. A polymer chain with higher r content may form more regular and therefore more rigid hydrogen bonding between the polymer chains in the bulk sample. Such a detailed study on the effects of tacticity on the properties of PVA has not been reported so far. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：9679 / 9686

页数：8

共 34 条

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