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8624700 
Meetings & Symposia 
STRAIN CRITERION IN NON-LINEAR CREEP AND RECOVERY IN CONCENTRATED POLYMER SOLUTIONS 
Wong, CP; Berry, GC 
1974 
Chk 
Polymer Preprints (American Chemical Society, Division of Polymer Chemistry)
ISSN: 0032-3934 
Atlantic City, NJ 
Sep 9-13 1974 
15 
2 
126-130 
A new, wire-suspended cone and plate rheometer has been used to study the creep, recovery, and steady-state flow properties of concentrated solutions of four different polymers over a range of conditions encompassing both linear and non-linear viscoelastic behavior. The polymers studied included - polydispersed linear polyvinyl acetate in diethyl phthalate, monodispersed PS in solvent mixture of tricresyl phosphate and Aroclor, polyisobutylene in cetane, and polydispersed heterocyclic polymer polybisbenzimidazobenzophenanthroline-dione (BBB) in methane sulfonate acid. The results of these studies indicate that a total strain criterion exists for the appearance of non-linear behavior with the four solutions studied.