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Li Wenguang, Jing Xiabin, Xu Zhengyan, Feng Zhiliu. A STUDY OF THE STRUCTURE OF SOLID PHASE CHLORINATED POWDER POLYETHYLENE[J]. Chinese Journal of Applied Chemistry,
;1986, 3(6): 20-24.
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Several studies on the micro-and crystalline structure of solution-and suspension-chlorinated polyethylene(CPE) have appeared in literature.This paper presents our study on the structure of solid phase chlorinated powder polyethylene by means of 13C-nuclear magnetic resonance, infrared spectroscopy, pyrolysis-gas chromatography and differential scanning calorimetry.The results show that chlorination of the samples with low chlorine-content was hindered-type substitution,while that of the samples with chlorine content over 50 wt% seemed to be more complicated. The molecular chains of these CPE mainly composed of -CH2- and -CHCl- groups; only in the samples with chlorine-content over 50 wt% appeared -CCl2- groups, the quantity of which,however,was extremely small. The change of crystallization behavior of these CPE was different from both the solution-chlorinated and the suspension chlorinated polyethylenes.
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