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Interpenetrating polymer networks based on ionically crosslinked polymers: Reacidification and annealing as morphological variables
Author(s) -
Siegfried D. L.,
Thomas D. A.,
Sperling L. H.
Publication year - 1981
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.1981.070260112
Subject(s) - materials science , divinylbenzene , polymer , annealing (glass) , elastomer , ionic bonding , polystyrene , polymer chemistry , in situ , polymerization , styrene , methacrylic acid , chemical engineering , polymer network , composite material , copolymer , chemistry , organic chemistry , ion , engineering
A carboxylic elastomer based on butadiene, styrene, and methacrylic acid was polymerized and neutralized to form an ionomeric network I. Sequential IPNs were formed by synthesizing in situ polystyrene crosslinked with divinylbenzene as network II. Annealing studies were carried out, with and without reacidification, to ascertain the role played by ionic crosslinks in influencing morphology and mechanical behavior. Finally, the product is reneutralized, resulting in are arranged, relaxed structure. Ionic crosslinks in polymer I provide an in situ decrosslinking mechanism which permits molecular rearrangements to be induced. By annealing the material, a more cocontinuous phase morphology with concomitant modulus increases is attained. This investigation suggests an alternative method of inducing dual phase continuity in multipolymer combinations.