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Stress rupture of polypropylene
Author(s) -
Forsman J. P.,
North H. C.,
Hakala T. H.
Publication year - 1966
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760060211
Subject(s) - materials science , polypropylene , ultimate tensile strength , stress (linguistics) , composite material , tacticity , work (physics) , mechanical engineering , polymer , engineering , philosophy , linguistics , polymerization
Tensile stress rupture is an important engineering property of plastics required in desiging parts subject to continuous or intermittent stress over long periods of time, especially in corrosive environments. This paper presents tensile stress rupture results on polypropylene and some of their applications in a program conducted over the past several years. Among the structural and compositonal paramaters studied in this work are the effects of molecular weight, molecular weight distribution, isotactic content, polyblends, and fillers on the shape and slope of the stress rupture‐time curve. Data are presented showing the interrelationships between these variables, and the agreement with current stress rupture theories is discussed.