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Polymerization by phase transfer catalysis—9. Bisphenol-A copoly(carbonate-thiocarbonate)s synthesis

✍ Scribed by L.H. Tagle; F.R. Diaz; P. Salas

Publisher: Elsevier Science
Year: 1989
Tongue: English
Weight: 242 KB
Volume: 25
Category: Article
ISSN: 0014-3057
DOI: 10.1016/0014-3057(89)90003-7

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✦ Synopsis

Copoly(carbonate-thiocarbonate)s were synthesized from bisphenol-A and mixtures of phosgene and thiophosgene under phase transfer conditions, using quaternary ammonium salts and dichloromethane as solvent at three temperatures. The copolymeric compositions were determined by i.r. spectroscopy and the molecular weights were estimated from inherent viscosities. The influence of temperature and the catalysts were studied; both exert important effects on the molecular weights

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Polymerization by phase transfer catalysis. 12. Poly(ether-ester)s from (2,2-bis(1,4-phenyleneoxy)-propylidene)-diacetic acid and related diacids with diphenols

✍ L. H. Tagle; F. R. Diaz; M. A. Vargas 📂 Article 📅 1991 🏛 John Wiley and Sons 🌐 English ⚖ 456 KB

## Abstract Poly(ether‐ester)s from (2,2‐bis(1,4‐phenyleneoxy)‐propylidene)‐diacetic acid and related diacids with diphenols were synthesized using several ammonium and phosphonium salts as phase transfer catalysts. The best results were obtained with benzyltriethylammonium chloride, which is a hyd