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Properties of polyamic acid ionomers
Author(s) -
Yu Xuehai,
Grady Brian P.,
Reiner Richard S.,
Cooper S. L.
Publication year - 1993
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.1993.070470915
Subject(s) - ionomer , polymer chemistry , phase (matter) , ionic bonding , oligomer , materials science , polymer , neutralization , oxide , chemistry , chemical engineering , polymer science , ion , organic chemistry , composite material , copolymer , antibody , immunology , biology , engineering
Polymers containing amic acid units were produced by reacting an oligomer based on polytetramethylene oxide (PTMO) with 1,2,4,5‐benzenetetracarboxylic dianhydride (BTDA). Neutralization by a metal salt produced amic acid ionomers. Similar to other ionomer systems, neutralization from the acid to the ionomer led to the formation of a separate ionic phase as determined by dynamic mechanical analysis. Phase separation resulted in a substantial increase in mechanical properties. The effect of neutralization level, cation, soft‐segment molecular weight, and soft‐segment end group on mechanical and thermal properties was investigated. © 1993 John Wiley & Sons, Inc.