✦ LIBER ✦
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
✍ Scribed by L. H. Tagle; F. R. Diaz; M. A. Vargas
- Publisher
- John Wiley and Sons
- Year
- 1991
- Tongue
- English
- Weight
- 456 KB
- Volume
- 42
- Category
- Article
- ISSN
- 0323-7648
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✦ Synopsis
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 hydrophilie catalyst that not promotes hydrolysis of the polymeric chains. Other onium salts also were effective as phase transfer catalysts. Polymers were characterized by IR and ^1^H‐NMR spectroscopy and elemental analysis. Molecular weights were estimated by inherent viscosity measurements.