Abstract
Poly(ethylene-co-5.4 mol% n-alkyl/branched alkyl methacrylate)s (PEM) were prepared by a dehydrogenchloride reaction of poly(ethylene-co-5.4 mol% alkyl methacrylic chloride) with the corresponding alkyl alcohol to investigate effect of branching structure and length of alkyl ester on a few physical properties of PEM [glass transition temperature (Tg), degree of crystallinity in polyethylene region (Xc) and dielectric molecular motion], where the alkyl groups used here are n-propyl, n-butyl, n-hexyl, n-decyl, 2-ethylhexyl, 3,5,5-trimethylhexyl and 2-(1′,3′,3′-trimethylbutyl)-5,7,7-trimethyloctyl. In the n-alkyl methacrylate copolymers, Tg and Xc were almost unchanged with the presence of alkyl ester, but Tg increased and Xc decreased in the highly branched alkyl methacrylate copolymers even at the low methacrylate content of 5.4 mol%.
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