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Crystallization of networks under stress
Author(s) -
Smith K. J.
Publication year - 1976
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.760160309
Subject(s) - crystallization , crystallite , materials science , chain (unit) , stress (linguistics) , crystallography , composite material , thermodynamics , physics , chemistry , linguistics , philosophy , astronomy , metallurgy
A theory of crystallization under stress is developed about the premise that the direction a chain takes through a crystallite, relative to its end‐to‐end vector, is determined by the first few links of a chain that initially deposit onto the crystallite surface. Since these few links are quickly trapped by subsequently crystallizing chains, their orientational probability prior to deposition governs the chain direction through the crystallite, and the properties of the system depend upon a statistical distribution of all vector orientations. Such a model leads to a relationship between the melting temperature and the degree of network orientation, and relates the retractive force to temperature in the crystallization region. The theory appears to adequately describe some of the published data on rubber and polychloroprene networks.