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- W1993115254 abstract "Chlorination of cis-1,4-polybutadiene (PB) has been studied in detail. It was found that chlorination must be carried out in an oxygen free atmosphere at polymer concentrations below 0.5%, and at temperatures below room temperature in mixed solvents with dichloromethane as the major component. In the initial stage of chlorine addition to the double bonds of cis-1,4-polybutadiene, block structures of chlorinated segments are formed. The chlorine addition to the cis-butadiene units was not stereospecific and the final chlorination product had nearly a 1:1 ratio of the threo- and erythro structure of the CHCICHCI-units. Microphase separation in partially chlorinated PB was observed by d.s.c., dynamic-mechanical measurement, and transmission electron microscopy. It was concluded that partially chlorinated PB, whose degree of chlorination was lower than 65 mole %, was composed of almost pure cis-1,4-PB domains and a separate phase which consists ofCH2CHCICHCICH2units with perhaps as much as 10% of cis-1,4-PB units incorporated in this phase. If the degree of chlorination is more than 90 mole % one phase exists." @default.
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- W1993115254 date "1982-11-01" @default.
- W1993115254 modified "2023-10-18" @default.
- W1993115254 title "Head-to-head polymers: 19. Chlorination of cis-1,4-polybutadiene" @default.
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- W1993115254 doi "https://doi.org/10.1016/0032-3861(82)90126-4" @default.
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