Abstract
CERTAIN monomers, when irradiated in the solid state, polymerize only to a limited conversion. When aerylonitrile is irradiated with γ-rays at −196° C it appears impossible to polymerize the monomer beyond a conversion of approximately 5 per cent1–3. If, however, the irradiated monomer is allowed to melt and then resolidified, a stepwise conversion curve is obtained on further irradiation, with yields of approximately 25 per cent1. One explanation of this phenomenon is that initiation occurs at crystal defects and termination occurs at grain boundaries or other surfaces.
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CHARLESBY, A., GARRATT, P. & MORRIS, J. Radiation-induced Solid-State Polymerization of Acrylonitrile and Acrylamide in the Presence of an Electric Field. Nature 196, 574–575 (1962). https://doi.org/10.1038/196574a0
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DOI: https://doi.org/10.1038/196574a0
