Effect of conditions of crystallization and annealing of polypropylene on post-radiation grafting

A study was made of the effect of supermolecular structure and the geometry of isotactic PP films on post-radiation grafting of styrene and methyl methaccrylate from gaseous phase at 20°. It was confirmed that slow cooling from melt and increasing the temperature of annealing of quenched films resul...

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Bibliographic Details
Published in:Polymer science USSR 1977, Vol.19 (4), p.1011-1016
Main Authors: Styrikovich, N.M., Mironov, N.A., Nikol'skii, V.G.
Format: Article
Language:English
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Summary:A study was made of the effect of supermolecular structure and the geometry of isotactic PP films on post-radiation grafting of styrene and methyl methaccrylate from gaseous phase at 20°. It was confirmed that slow cooling from melt and increasing the temperature of annealing of quenched films results in a more ordered structure of the polymer matrix and has a considerable effect on the yield or graft copolymer. The amount of copolymer graft to annealed films 50 μm thick increases 4 times on increasing the temperature of annealing from 40 to 140°. Extremal relations were derived between graft copolymer yield and films thickness and the dose of irradiation. These relations are explained by monomer absorption by the polymer matrix irradiated.
ISSN:0032-3950
1878-268X
DOI:10.1016/0032-3950(77)90259-3