Blends containing amphiphilic polymers. V. Compatibilization or N-alkylitaconamic acid-co-styrene copolymers with interacting polymers

Marcela Urzúa, Claudia Sandoval, Fernando González-Nilo, Angel Leiva, Ligia Gargallo, Deodato Radić

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

The phase behavior of blends containing N-alkylitaconamic acid-co-styrene copolymers (NAIA-co-S) with poly(N-vinyl-2-pyrrolidone) (PVP) of two different weight average molecular weights (M̄w̄), poly(2-vinylpyridine) (P2VPy) and poly(4-vinylpyridine) (P4VPy), was analyzed by differential scanning calorimetry and Fourier transform infrared spectroscopy. Copolymers containing 80% S are miscible with PVP10, PVP24, and P4VPy over the whole range of composition. In the case of blends with P2VPy, miscibility is observed only for the first three members of the series, i.e., NEIA-co-S, NPIA-co-S, and NBIA-co-S. For copolymers containing hexyl to dodecyl moieties, phase separation is observed in blends with P2VPy. Copolymers containing 50% S are miscible over the whole range of composition irrespective of the homopolymer and the length of the side chain of the itaconamic moiety of the copolymer. This behavior is interpreted in terms of steric hindrance, in the sense that the copolymers with long side chains are not able to interact with the nitrogen of P2VPy because of the position in the aromatic ring. The interactions between copolymers and homopolymers are discussed in terms of specific interactions like hydrogen bonds between the itaconamic moiety and the different functional groups of the homopolymers, together with the hydrophobic interaction, which cannot be disregarded.

Original languageEnglish
Pages (from-to)2512-2519
Number of pages8
JournalJournal of Applied Polymer Science
Volume102
Issue number3
DOIs
Publication statusPublished - 5 Nov 2006

Keywords

  • Amphiphilic polymers
  • Compatibility
  • DSC
  • FTIR
  • Hydrogen bonds
  • Hydrophobic effect
  • N-1-alkylitaconamic acid-co-styrene copolymer

ASJC Scopus subject areas

  • Polymers and Plastics
  • Surfaces, Coatings and Films
  • Materials Chemistry
  • Chemistry(all)

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