Extreme difference of polarities in a single material: Poly(acrylic acid)-based amphiphilic conetworks with polyisobutylene cross-linker

Szabolcs Pásztor, B. Iván, Gergely Kali

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Poly(acrylic acid) (PAA) with polyisobutylene (PIB) were combined to form an interconnected three-dimensional material with extreme philicity differences in it. Methacrylate telechelic PIB macromonomer with narrow molar mass distribution and functionality around 2 was copolymerized with 1-ethoxyethyl acrylate, as protected hydrophilic comonomer, to form poly(1-ethoxyethyl acrylate)-linked by-polyisobutylene (PEEA-l-PIB) co-networks. The copolymerization was carried out in THF via free radical polymerization, initiated by α, α’-azobisisobutyronitrile (AIBN) thermal radical initiator, for 3 days at 65°;C. After the reaction the gels were placed into THF that is a common solvent for both monomers and the initiator, to extract the non-reacted components. It was found that the soluble fraction is below 20% in every case indicating efficient cross-linking for the formation of the PEEA-l-PIB co-networks. All the co-networks were in the collapsed (non-swollen) state under acidic conditions, while started to swell and become a gel as the pH increases. All the PAA-l-PIB APCNs are beginning to swell around pH 5-6, despite their different composition, but the subsequent swelling depended on the hydrophilic/hydrophobic ratio in the gels.

Original languageEnglish
Pages (from-to)1818-1821
Number of pages4
JournalJournal of Polymer Science, Part A: Polymer Chemistry
Volume55
Issue number11
DOIs
Publication statusPublished - Jun 1 2017

Fingerprint

carbopol 940
Acrylics
Gels
Acids
Molar mass
Free radical polymerization
Copolymerization
Swelling
Monomers
Methacrylates
Chemical analysis
polyisobutylene

Keywords

  • amphiphilic conetwork
  • intelligent swelling
  • phase separation
  • poly(acrylic acid)
  • polyisobutylene

ASJC Scopus subject areas

  • Polymers and Plastics
  • Organic Chemistry
  • Materials Chemistry

Cite this

Extreme difference of polarities in a single material : Poly(acrylic acid)-based amphiphilic conetworks with polyisobutylene cross-linker. / Pásztor, Szabolcs; Iván, B.; Kali, Gergely.

In: Journal of Polymer Science, Part A: Polymer Chemistry, Vol. 55, No. 11, 01.06.2017, p. 1818-1821.

Research output: Contribution to journalArticle

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