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Deformation and entanglement in semicrystalline polymers
Author(s) -
Plummer C. J. G.,
CudréMauroux N.,
Kausch H.H.
Publication year - 1994
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.760340414
Subject(s) - crazing , materials science , amorphous solid , polymer , tacticity , polystyrene , polyoxymethylene , deformation (meteorology) , crystallinity , composite material , supercooling , quantum entanglement , polycarbonate , polymer science , crystallography , polymerization , thermodynamics , quantum , physics , quantum mechanics , chemistry
Transmission electron microscopy and optical studies of thin films of isotactic polystyrene (iPS) and polyoxymethylene (POM) provide evidence for a distinction between crazing mechanisms in semicrystalline polymers above and below T g . In the latter temperature regime, deformation in iPS and POM crystallized at high supercooling has been discussed in terms of existing models for crazing in amorphous glassy polymers, based on entanglement ideas. Above T g , where the difference in mechanical behavior of the amorphous and crystalline regions becomes marked, the fibrillar nature of local deformation appears to be a consequence of the inhomogeneity of the undeformed polymer.