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Crystallization in poly(c/s‐1,4‐cyclohexane dimethanol sebacate) model networks in the unstrained and strained states
Author(s) -
Riande E.,
Guzman J.,
Mark J.E.
Publication year - 1986
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.760260407
Subject(s) - crystallization , materials science , elongation , cyclohexane , melting point , thermodynamics , stress relaxation , stress (linguistics) , shrinkage , relaxation (psychology) , chemical engineering , composite material , crystallography , organic chemistry , ultimate tensile strength , chemistry , creep , psychology , social psychology , linguistics , physics , philosophy , engineering
Rates of crystallization, stress‐optical coefficients, and melting points were determined for unelongated and elongated polysebacate model networks. For the unelongated networks, the maximum rate of crystallization was found to occur at approximately 0°C. For the elongated networks, the stress‐optical coefficients documented the extent to which strain‐induced crystallization was facilitated by increase in elongation and decrease in temperature. Measurements of stress relaxation due to crystallization at constant elongation indicated that the dimensionality of crystallization growth decreased from 3.0 to 2.5 as the temperature increased Melting points increased significantly with increase in elongation as predicted by theory. Fiber (non‐equilibrium) shrinkage temperatures, as expected, showed no correlation with the melting points.