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A new family of telechelic copolymers

II. Initiation system PVC/BCl3

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Summary

A new initiation system polyvinylchloride (PVC) /boron trichloride (BCl3) is demonstrated, which makes possible bulk polymerizations of isobutylene at a temperature about-78°C. The bulk polymerizations of isobutylene take place at the boundary between the solid and liquid phase for many hours, and PVC is grafted by isobutylene. Dichloromethane (CH2Cl2) raises the reactivity of the initiation system, and a graft copolymer poly (vinylchloride-g-isobutylene) PVC-g-PIB-Clt is formed, where-PIB-Clt is-[CH2C(CH3)2]n-CH2C(CH3)2Cl. At-20°C the polymerization of isobutylene/BCl3/CH2Cl2 proceeds in the presence of secondary alkylchlorides, such as 2,4-dichloropentane or 2,4,6-trichloroheptane, up to a 100% conversion, with formation of polyisobutylene oil \((\bar M_n \sim 3 \times 10^3 )\).

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Authors and Affiliations

  1. Institute of Macromolecular Chemistry, Czechoslovak Academy of Sciences, CS-16206, Prague 6, Czechoslovakia

    Rudolf Lukáš & Luděk Toman

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  1. Rudolf Lukáš
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  2. Luděk Toman
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Lukáš, R., Toman, L. A new family of telechelic copolymers. Polymer Bulletin 24, 285–291 (1990). https://doi.org/10.1007/BF00306576

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