Some unsolved problems concerned with radiation grafting to natural and synthetic polymers

Autor:	V. Stannett, T. Memetea
Rok vydání:	2007
Předmět:	chemistry.chemical_classification Materials science General Engineering Chain transfer Polymer Grafting Cellulose acetate Styrene chemistry.chemical_compound surgical procedures operative chemistry Polymer chemistry Polyethylene terephthalate Molar mass distribution Polystyrene
Zdroj:	Journal of Polymer Science: Polymer Symposia. 64:57-69
ISSN:	1936-0959 0360-8905
DOI:	10.1002/polc.5070640107
Popis:	The radiation grafting behavior of styrene to cellulose acetate, polyethylene terephthalate, and wool was examined in some detail. A combination of ESR and an analysis of the grafted products was used. Each system exhibited a certain feature which was difficult to explain. The preirradiation grafting of styrene to cellulose acetate gave a bimodal molecular weight distribution of the grafted side chains, the bulk consisting of an extremely narrow distribution high molecular weight polystyrene. Some possible explanations are presented. The yields of grafted side chains in the case of polyethylene terephthalate were considerably greater than the radical yields determined by ESR. Finally in the case of radiation grafting of styrene to wool, numerous low molecular weight branches were obtained. A backbiting type of chain transfer to polymer mechanism was postulated to explain these results and may also be present in the grafting of styrene to polyethylene terephthalate.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::8c48f7414739ed78b0448b5dcd5b98f7 https://doi.org/10.1002/polc.5070640107 Zobrazit plný text záznamu