Molecular weight distribution in polymethyl methacrylate
Autor: | Ivan Harris, R. G. J. Miller |
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Rok vydání: | 1951 |
Předmět: | |
Zdroj: | Journal of Polymer Science. 7:377-392 |
ISSN: | 1542-6238 0022-3832 |
Popis: | The Morey-Tamblyn turbidity method has been used to investigate the molecular weight distribution in a series of polymethyl methacrylates including commercial and experimental injection moulding powders. Evidence has been obtained that the increase in rate of polymerization occuring in the polymerization of methyl methacrylate (Norrish-Smith effect) causes widening of the distribution in high conversion polymers, but the separation into multiple peaks reported by other authors has not been observed. From an examination of specially prepared polymers, e.g., at small degrees of conversion, it is concluded that chain combination is a more likely termination process than disproportionation. |
Databáze: | OpenAIRE |
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