Block copolymers derived from polyisobutylene oligomers

Ying Hua Fu, Sherzod Madrahimov, David E. Bergbreiter

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1 Citation (Scopus)

Abstract

The synthesis of polyvalent functionalized polyisobutylene (PIB) oligomers containing multiple polar groups via radical polymerization is described. Polymerizations from PIB macroinitiators via alkylborane intermediates can form block copolymers but the polar block is consistently larger than the PIB block and unless a hydrophobic monomer is used, the products are insoluble in alkanes. Block copolymer products from ATRP macroinitiators are formed with more control over the degree of polymerization of a polar block from a 1000 Da PIB starting material but are still alkane insoluble because the degree of polymerization of the polar block was consistently equal to or greater than the degree of polymerization of the PIB block. RAFT polymerization using 5 mol % of azoisobutyronitrile relative to a PIB macroinitiator however was successful in producing acceptable yields of alkane soluble block copolymers using a 1000 Da PIB starting material and monomers like methyl methacrylacrylate, ethyl methacrylate, N,N-dimethylacrylamide, and N-isopropylacrylamide.

Original languageEnglish
Pages (from-to)1860-1867
Number of pages8
JournalJournal of Polymer Science, Part A: Polymer Chemistry
Volume56
Issue number16
DOIs
Publication statusPublished - 15 Aug 2018

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Keywords

  • ATRP
  • block copolymers
  • borane/O initiation
  • macroinitiator
  • polyisobutylene
  • RAFT

ASJC Scopus subject areas

  • Polymers and Plastics
  • Organic Chemistry
  • Materials Chemistry

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