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Stress relaxation in molten polymers. IV
Author(s) -
Mussa C.,
Sacerdote P.,
Guglielmino P.,
Tablino V.
Publication year - 1964
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.1964.070080124
Subject(s) - branching (polymer chemistry) , polymer , dispersity , tacticity , materials science , relaxation (psychology) , polymer science , stress relaxation , polymer chemistry , yield (engineering) , rheology , thermodynamics , polymerization , composite material , creep , physics , psychology , social psychology
After a survey of suggested analytical methods, data are given for ten polymer samples (high and low pressure polyethylenes, atactic and isotactic polypropylenes, and of natural rubbers). It appears that the suggested methods of plotting the stress relaxation data after cessation of steady flow, as well as the quantities defined from such analysis, in the case of the given polymers can yield qualitative and semiquantitative information on such structural features such as average chain length, polydispersity, chain regularity, long branching, and crosslinking.