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XIAO KWEI-ZHENG, WANG I-Lu, TAO JIA-LIANG, HSU Zo-PU, YU SHOU-MING, DING MA-TAI. EMULSION COPOLYMERIZATION OF CHLOROPRENE AND ISOPRENE[J]. Acta Polymerica Sinica,
;1966, 8(1): 21-27.
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Emulsion copolymerization of chloroprene and isoprene initiated by potassium persulphate has been investigated. When chloroprene and isoprene were copolymerized to approximately 80% conversion, only a small amount of gel occurred. The peak in the viscosity-conversion curve, followed by a marked drop, is usually a sign of gel formation, since the insoluble gel does not contribute to the viscosity of the solution. The product thus obtained has a markedly decreased rate of crystallization, and the brittle-point of the vulcanizates is 5℃lower than those of the corresponding vulcanizates from Neoprene type GN-A.
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