Premium
Synthesis and characterization of imide end‐capped oligoesters of terephthalic acid and 2‐methyl‐2‐propyl‐1,3‐propanediol
Author(s) -
Acevedo M.,
De La Campa J. G.,
Abajo J. De
Publication year - 1990
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/app.1990.070410114
Subject(s) - maleimide , diethylene glycol , condensation polymer , terephthalic acid , thermal stability , polymer chemistry , oligomer , imide , end group , ethylene glycol , ether , molar mass distribution , chemistry , materials science , organic chemistry , polymer , polyester , copolymer
Abstract Hydroxytelequelic oligoesters of molecular weight ( M n ) between 500 and 3000 were prepared from dimethylterephthalate (DMT) and 2‐methyl‐2‐propyl‐1,3‐propanediol (MPPD) by ester interchange polycondensation. They were modified by reaction of their end hydroxyl groups with N ‐(4‐chlorocarbonylphenyl) maleimide and N ‐(4‐chlorocarbonylphenyl) nadimide. Spectroscopic (NMR), chromatographic (GPC), and calorimetric (DSC) analyses demonstrated that MPPD oligoterephthalates are less reactive than previously used glycols (diethylene glycol, DEG) and only nadimide‐modified oligomers could be readily synthesized. Attempts to introduce maleimide groups at the chain ends led to crosslinked materials. Furthermore, some relationships between molecular weight and properties ( T g , thermal stability, etc.) could be outlined. The oligomers, unmodified and modified, proved to be essentially amorphous.