Hyperbranched modification of unsaturated side chains of polyethylene introduced by γ-ray irradiation under a 1,3-butadiene atmosphere |
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摘 要: | Amino and other functional groups were introduced to a polyethylene substrate starting from the unsaturated pendant and bridge
groups (collectively called side chains) of polyethylene, which had been prepared by γ-ray irradiation under an atmosphere
of 1,3-butadiene of the polyethylene substrate (the drawn film of ultra-high- molecular-weight polyethylene, Mˉv: 5 × 106). 2-Aminoethylamino groups were introduced to the side chains through treatment either with bromine or with peracetic acid
vapor followed by immersion in ethylenediamine. Introduction of amino groups were confirmed by Fourier transform IR spectrometry,
ninhydrin test, and acid–base titration. Starting from 2-aminoethylaminated polyethylene, modification cycles to grow a dendrimer
on the film were applied; these consisted of 2-methoxycarbonylethylation and 2-aminoethylamidation. This technique resulted
in hyperbranched modification of the polymer. The product is a kind of dendrimer grown on the surface of polyethylene film
with amplified amino ends and has anion-exchange capacity and absorbs acid dye. Its application in practical uses is discussed.
Received: 31 March 2000 Accepted: 2 January 2001
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收稿时间: | 12 November 2007 |
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