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Isobutylene polymerization in the presence of t-BuCl/SnCl4

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Summary

The effect of tert-butyl chloride in the polymerizations of isobutylene carried out in the presence of SnCl4 in dichloromethane at temperatures-20°C and-78°C was investigated. Synthesized polyisobutylene samples showed a bimodal molecular weight distribution (MWD) and it was found that the weight content of the lowermolecular weight (LMW) fraction increased with increasing t-BuCl concentration in the polymerization mixture. The effect of ageing of the initiation mixture t-BuCl/SnCl4 in CH2Cl2 prepared in advance on MWD of the PIB samples was also studied. Ageing of the initiation system supports the formation of the LMW fraction and this oily PIB is the only product of the polymerization at-20°C, \(\bar M_n \sim 500,\bar M_w /\bar M_n \leqslant 1.4\).

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Authors and Affiliations

  1. Institute of Macromolecular Chemistry, Czechoslovak Academy of Sciences, CS-162 06, Prague 6, Czechoslovakia

    Luděk Toman, Rudolf Lukáš & Jiří Spěváček

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  1. Luděk Toman
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  2. Rudolf Lukáš
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  3. Jiří Spěváček
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Toman, L., Lukáš, R. & Spěváček, J. Isobutylene polymerization in the presence of t-BuCl/SnCl4 . Polymer Bulletin 28, 175–180 (1992). https://doi.org/10.1007/BF00299653

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