Premium
Aromatic polyesters via transesterification of dimethylterephthalate/isophthalate with bisphenol‐a
Author(s) -
Mahajan S. S.,
Idage B. B.,
Chavan N. N.,
Sivaram S.
Publication year - 1996
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/(sici)1097-4628(19960926)61:13<2297::aid-app8>3.0.co;2-7
Subject(s) - transesterification , polyester , prepolymer , dimethyl terephthalate , isophthalic acid , bisphenol , terephthalic acid , methanol , organic chemistry , bisphenol a , polymer chemistry , materials science , condensation polymer , chemistry , catalysis , polyurethane , epoxy
As a part of our work in the area of transesterification chemistry, we have studied the transesterification of dimethyl terephthalate/isophthalate with bisphenol‐A for the synthesis of aromatic polyester. The process comprises two steps. The first step comprises preparation of aromatic polyester prepolymer by reacting the dimethyl esters of terephthalic/isophthalic acids and bisphenol‐A in the melt phase via catalyzed interchange reaction. The second step involves the postpolycondensation of aromatic polyester prepolymer under reduced pressure, eliminating the by‐product and driving the equilibrium of the reversible reaction to the formation of a high molecular weight aromatic polyester. In both steps, methanol is eliminated as a by‐product. The method explored is the simplest one, permits the use of commercial materials as the feed stock, and leads to a low boiling by‐product that can be recycled. © 1996 John Wiley & Sons, Inc.