MESOPHASE FORMATION OF HYDROXYPROPYL CELLULOSE AS AFFECTED BY MISCIBILITY WITH A FLEXIBLE POLYMER

POLYMER

卷:32

Article

WANG, LF ; PEARCE, EM ; KWEI, TK

关键词: LIQUID CRYSTALLINE STRUCTURE;    HYDROXYPROPYL CELLULOSE;    POLYMER BLENDS;   

DOI  :  10.1016/0032-3861(91)90010-G

来源: Elsevier

【 摘 要 】

The concentration for mesophase formation of hydroxypropyl cellulose (HPC) in water or acetic acid was affected by the addition of a flexible polymer such as poly(N,N-dimethyl acrylamide) (PDMA) and poly(vinylpyridine), which were proton acceptors with preferential affinity for the solvent. The critical concentration decreased when the amount of flexible counterpart increased. HPC and PDMA produced a two-phase blend by solvent casting but a single-phase blend was obtained by in situ polymerization. Solution blending of HPC with poly(acrylic acid) resulted in precipitation. The precipitates and the films cast from supernatant solutions each showed a single glass transition. The in situ polymerization of acrylic acid with HPC also resulted in a single-T(g) material.

【 授权许可】

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