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The role of inter‐ and intra‐links in the transformation of folded chain lamellae into microfibrils
Author(s) -
Tarin P. M.,
Thomas E. L.
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.760191409
Subject(s) - crystallization , materials science , transmission electron microscopy , composite material , polyethylene , deformation (meteorology) , chain (unit) , stress (linguistics) , process (computing) , crystallography , chemical engineering , nanotechnology , computer science , chemistry , linguistics , philosophy , physics , astronomy , engineering , operating system
In this study we investigate the effect of crystallization rate on the extensibility (draw ratio) of spherulitic polyethylene film uniaxially deformed at room temperature. Draw ratios for deformed films increased with increasing crystallization temperature. Transmission electron microscopy of the microfibrillar structures revealed and interconnected network of fibrils. The degree of connectivity between microfibrils was found to decrease with increasing‐crystallization temperature. A model of the deformation process is developed in which inter‐ and intra‐link (extended chain fibers formed during crystallization) distribute the applied stress, initiate the micronecking process and influence the amount of chain unfolding during drawing.