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Strain‐induced crystallization kinetics of vinylidene chloride/vinyl chloride (VDC/VC) copolymers
Author(s) -
Lund Monty,
Remenar Richard,
Burt Ed
Publication year - 1988
Publication title -
journal of vinyl technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 35
eISSN - 1548-0585
pISSN - 0193-7197
DOI - 10.1002/vnl.730100111
Subject(s) - copolymer , crystallization , vinyl chloride , materials science , plasticizer , polymer chemistry , amorphous solid , chemical engineering , kinetics , strain (injury) , polymer , composite material , chemistry , organic chemistry , medicine , physics , quantum mechanics , engineering
The strain‐induced crystallization ( SIC ) behavior of VDC/VC copolymers has a significant effect on processibility on the blown film process. However, data on SIC of VCD/VC copolymers has been very limited due to the difficulty of measuring the rapid crystallization rates induced by strain; whereas, crystallization under quiescent conditions has been studied extensively. In this work, SIC of VDC/VC copolymers has been calculated from measurements of the adiabatic temperature rise upon stretching of amorphous specimens. The effect of stretching conditions such as strain rate, total strain, and initial temperature and the effect of polymer variables such as copolymer composition, molecular weight, and plasticizer content are determined. It is found that the performance of different VDC/VC copolymers on the film‐blowing process correlates much better with measurements of SIC than with quiescent crystallization behavior.