Summary
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1.
n investigation was made of the emulsion and mass copolymerization of chloroprene with isopropyl vinyl ether at various temperatures.
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2.
n presence of initiators for radical copolymerization, two mechanisms operate simultaneously; a) copolymerization by the radical mechanism, and b) copolymerization by the cationic mechanism.
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3.
he relative amounts of copolymers of the radical and cationic types are considerably dependent on the polymerization conditions. Under all conditions the copolymer of the cationic type predominates.
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4.
Conditions were found which make it possible for the process to be directed in a single direction with formation of copolymers containing tip to 95–98% of the vinyl ether (molecular weight 60,000–90,000) or 80–90% of chloroprene (molecular weight 60,000).
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5.
The radical-copolymerization constants of the system were determined; r1 = 0.164± 0.043; r2 = 11.45 ± 0.54. The existence of two constants is explained as the result of the effect of the penultimate monomer unit (M2).
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6.
The emulsion copolymers corresponded in composition to a mechanism of radical copolymerization.
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Mitsengendler, S.P., Krasulina, V.N. & Trukhinanova, L.B. Copolymerization of dienic hydrocarbons with vinyl ethers. Russ Chem Bull 5, 1137–1145 (1956). https://doi.org/10.1007/BF01177367
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DOI: https://doi.org/10.1007/BF01177367