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Characterization of a nylon 6/poly(methyl acrylate) copolymer produced by radiation grafting
Author(s) -
Huglin Malcolm B.,
Richards Randal W.
Publication year - 1980
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1980.070251106
Subject(s) - copolymer , polymer chemistry , acrylic acid , acrylate , grafting , side chain , methyl acrylate , ethyl acrylate , materials science , chemistry , polymer , organic chemistry
Acrylic acid has been grafted onto nylon 6 by the mutual γ‐irradiation technique. Methods are described for removing poly(acrylic acid) homopolymer and ungrfted nylon, the latter involving intermediate conversion to the calcium ionomer. The pure graft copolymer in its methylated form, viz., nylon 6/poly(methyl acrylate), NY/PMA, was characterized by light scattering in mixed solvents to yield the true molecular weight (3.2 × 10 6 ) as well as the molecular weights M PMA (domain) and M NY (domain) of the PMA and NY portions, respectively. The molecular weight M PMA of the grafts was measured after hydrolysis of the backbone, and the molecular weight M NY of the backbone was determined via a previously devised indirect procedure. Comparisons of M PMA (domain) with M PMA and of M NY (domain) with M NY gave ˜ 7 nylon chains and ˜ 17 poly(methyl acrylate) chains per copolymer molecule. Chain transfer and bimolecular terminatin during grafting are proposed as probable contributory factors to the branched structure of the copolymer.