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The effect of strain‐induced crystallization on the ultimate properties of an elastomeric polymer network
Author(s) -
Mark James E.
Publication year - 1979
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.760190608
Subject(s) - materials science , crystallization , elastomer , polybutadiene , polydimethylsiloxane , plasticizer , composite material , polymer , elongation , strain (injury) , ultimate tensile strength , crystallite , crystallization of polymers , chemical engineering , medicine , metallurgy , engineering , copolymer
Elastomeric networks made up of chain molecules of sufficient structural regularity generally exhibit strain‐induced crystallization. Crystallites thus formed have a pronounced reinforcing effect within the network, and thus increase its ultimate properties (ultimate strength and maximum extensibility), Increase in temperature or addition of diluent (plasticizer) suppresses the strain‐induced crystallization and thus diminishes the ultimate properties. These effects are demonstrated using stress‐strain isotherms obtained in elongation for crystallizable networks of cis ‐1, 4‐polybutadiene and of polyisobutylene. The magnitude of the effects of strain‐induced crystallization are determintud by comparisons of the ultimate properties of these two crystallizable networks with the corresponding ultimate properties of noncrysrallizable networks of polydimethylsiloxane.