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New Polymer Syntheses. 95. Photosetting Cholesteric Polyesters Derived from 4-Hydroxycinnamic Acid and Isosorbide

โœ Scribed by Sapich, Beate; Stumpe, Joachim; Krawinkel, Thorsten; Kricheldorf, Hans R.


Book ID
126556328
Publisher
American Chemical Society
Year
1998
Tongue
English
Weight
374 KB
Volume
31
Category
Article
ISSN
0024-9297

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Star-shaped polyesters were prepared by polycondensation of tetraacetoxyspirobis(indane) and a 1 : 1 mixture of silylated b-(4-acetoxyphenyl)propionic acid and silylated 4-acetoxybenzoic acid. The lengths of the star arms were systematically varied, and the influence of the star center on the stabil

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Several binary copolycarbonates were prepared by polycondensation of 2,5-bis(4-hydroxybenzylidene)cyclopentanone, BHBC, with methylhydroquinone, MHQ, hydroquinone 4-hydroxybenzoate, HQHB, or isosorbide. Furthermore, five ternary copolycarbonates were prepared based on the aforementioned monomers. Al

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Binary copolyesters were prepared by polycondensation of the trimethylsilylester of acetylated P-(4-hydroxyphenyl)propionic acid (HPPA) with acetylated 4-hydroxybenzoic acid (HBA), vanillic acid (VA), 6-hydroxy-2-naphthoic acid (HNA), 4-hydroxycinnamic acid (HCA) or 4'-hydroxybiphenyl-4-carboxylic a

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The hyperbranched homopolyester of gallic acid (GA) was prepared by polycondensation of acetylated gallic acid in bulk. Copolyesters of gallic acid and 3-hydroxybenzoic acid (3-HBA) or โค-(4-hydroxyphenyl)propionic acid (HPPA) were prepared via the silylated monomers. The degree of branching was vari