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The relationships between morphology, irradiation and the ductile-brittle transition of isotactic polypropylene

✍ Scribed by Zhang, X C; Butler, M F; Cameron, R E

Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
119 KB
Volume
48
Category
Article
ISSN
0959-8103

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✦ Synopsis

The effect of the morphology of polypropylene, as controlled by annealing, on the material's micro-mechanical response before and after irradiation is explored using simultaneous SAXS/tensile deformation experiments. Morphology moderates the effects of cross-linking and scission on the deformation behaviour. The micro-mechanisms of deformation can be related to these morphological and chemical changes. It appears that a high tie-chain density and a low crystal thickness, which may be achieved by crystallisation at low temperatures, will encourage resistance to mechanical property deterioration under irradiation.

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