Living carbocationic polymerization - XIX. Synthesis of four-arm star polyisobutylenes capped by t-chlorine and isopropylidene groups

K. J. Huang, M. Zsuga, J. P. Kennedy

Research output: Article

30 Citations (Scopus)

Abstract

The synthesis of the first four-arm star polyisobutylenes (PIB) capped by t-chlorine and isopropylidene groups has been accomplished by the 3,3′,5,5′-tetra(2-acetoxy-isopropyl)biphenyl/BCl3 initiating system. The polymerizations yield tertchlorine capped arms which have been quantitatively dehydrochlorinated to isopropylidene end-groups. Homogeneous polymerization conditions seem to be mandatory for the synthesis of well-defined products. The polymers were characterized by GPC and 1H NMR spectroscopy and product homogeneity was demonstrated by KSN plots. The number average end functionality was found to be Fn=4.06 ± 0.4.

Original languageEnglish
Pages (from-to)43-50
Number of pages8
JournalPolymer Bulletin
Volume19
Issue number1
DOIs
Publication statusPublished - jan. 1988

Fingerprint

Living polymerization
Chlorine
Stars
chlorine
polymerization
Polymerization
synthesis
products
Nuclear magnetic resonance spectroscopy
homogeneity
Polymers
plots
nuclear magnetic resonance
polymers
spectroscopy
propylene
diphenyl

ASJC Scopus subject areas

  • Polymers and Plastics
  • Materials Chemistry

Cite this

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abstract = "The synthesis of the first four-arm star polyisobutylenes (PIB) capped by t-chlorine and isopropylidene groups has been accomplished by the 3,3′,5,5′-tetra(2-acetoxy-isopropyl)biphenyl/BCl3 initiating system. The polymerizations yield tertchlorine capped arms which have been quantitatively dehydrochlorinated to isopropylidene end-groups. Homogeneous polymerization conditions seem to be mandatory for the synthesis of well-defined products. The polymers were characterized by GPC and 1H NMR spectroscopy and product homogeneity was demonstrated by KSN plots. The number average end functionality was found to be Fn=4.06 ± 0.4.",
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T1 - Living carbocationic polymerization - XIX. Synthesis of four-arm star polyisobutylenes capped by t-chlorine and isopropylidene groups

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AU - Zsuga, M.

AU - Kennedy, J. P.

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AB - The synthesis of the first four-arm star polyisobutylenes (PIB) capped by t-chlorine and isopropylidene groups has been accomplished by the 3,3′,5,5′-tetra(2-acetoxy-isopropyl)biphenyl/BCl3 initiating system. The polymerizations yield tertchlorine capped arms which have been quantitatively dehydrochlorinated to isopropylidene end-groups. Homogeneous polymerization conditions seem to be mandatory for the synthesis of well-defined products. The polymers were characterized by GPC and 1H NMR spectroscopy and product homogeneity was demonstrated by KSN plots. The number average end functionality was found to be Fn=4.06 ± 0.4.

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