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The relationship between crystallization and deformation processes in crystalline high polymers
Author(s) -
Lindenmeyer P. H.
Publication year - 1964
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.760040305
Subject(s) - crystallization , materials science , nucleation , deformation (meteorology) , crystallization of polymers , crystal (programming language) , crystallography , crystal habit , morphology (biology) , bending , polymer , crystal growth , crystal structure , composite material , chemical engineering , chemistry , geology , organic chemistry , paleontology , computer science , engineering , programming language
The relationship between crystallization and deformation is two‐fold: (1) deformation or flow in polymers prior to crystallization has an important influence on the resultant crystalline morphology and (2) the morphology in turn largely determines the response of the structure to further deformation after crystallization. Thus, an understanding of deformation processes in crystalline polymers is intimately related to the crystallization processes and vice versa. The crystallization process may be approached by considering the observed morphological structures as being analogous to the usual crystal habits with the addition of various crystal‐defects which add bending and twisting to the more common crystallographic variations. The crystal habit or morphology may be characterized by its surface to volume ratio. Crystallization of polymers may be considered as three steps (1) the formation of primary nuclei (2) crystallographic growth (also a nucleation controlled process) and (3) the introduction of crystal‐defects which cause bending and twisting.