✦ LIBER ✦

Synthesis and liquid crystallinity of thermotropic polycarbonate-polystyrene graft copolymers

✍ Scribed by Takanori Kobayashi; Moriyuki Sato; Noboru Takeno; Ken-Ichi Mukaida

Publisher: Elsevier Science
Year: 1992
Tongue: English
Weight: 361 KB
Volume: 28
Category: Article
ISSN: 0014-3057
DOI: 10.1016/0014-3057(92)90062-7

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✦ Synopsis

Abstraet--Thermotropic liquid crystalline polycarbonate-graft-polystyrene copolymers were synthesized by the macromonomer method using melt polycondensation of a mixture of 6,6'-(4,4'-biphenylylenedioxy)dihexanol and styrene macromonomer with hexylene diphenyl dicarbonate taken in a definite molar ralio. The graft copolymers were characterized by FT-i.r spectra and elemental analysis. Their liquid crystallinites were investigated by differential scanning calorimetry and polarizing microscopy using a hot stage. Some of the products, except for polymers rich in styrene macromonomer, showed liquid crystallinites arising from the parent homopolycarbonate and had microphase-separated structures.

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