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Studies on thermotropic liquid crystalline polymers—V. Synthesis and properties of poly(ether amide)s

✍ Scribed by Ay-Ling Liang; Keh-Ying Hsu; Teh-Chou Chang

Publisher
Elsevier Science
Year
1992
Tongue
English
Weight
491 KB
Volume
28
Category
Article
ISSN
0014-3057

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✦ Synopsis

Two series of poly(ether amide)s, ! and II, were prepared by direct polycondensation from 4,4'-diacrylic acid<t, to-diphenoxyalkanes and 4,4'-dicarboxyl-~, to-diphenoxyalkanes with diamines. The phase behaviour of these polymers was studied by differential scanning calorimetry and optical polarizing microscopy using a heated stage. Poly(ether amide) IId showed thermotropic liquid crystalline behaviour by observation under the optical polarizing microscope but poly(ether amide)s I and It did not exhibit thermotropic liquid crystallinity unambiguously. It is suggested that these results are due to interchain hydrogen bonds.

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