Developing toughened aromatic polybenzoxazines using thermoplastic oligomers and telechelics, part 1: Preparation and characterization of the functionalized oligomers

Ian Hamerton*, Lisa T. McNamara, Brendan J. Howlin, Paul A. Smith, Paul Cross, Steven Ward

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

1 Citation (Scopus)

Abstract

The preparation and characterization of three families of thermoplastic oligomers (Mn‰=‰2918-13263 g mol-1) based on polyarylsulfone (PSU) differing in both molecular weight and terminal functionality and one series of polyarylethersulfone (PES) of different molecular weights is reported. Infrared and nuclear magnetic resonance spectroscopy data support the formation of both the hydroxyl terminated oligomers and conversion (67-89% depending on molecular weight) to the telechelic PSU oligomer bearing reactive benzoxazine groups. Differential scanning calorimetry reveals that the onset of homopolymerization in the telechelic PSU oligomer occurs at around 100°C (peak maximum 125°C at 10 K/min) and rescans show values of the glass transition (for the homopolymers) ranging from 124 to 167°C depending on molecular weight. The influence on the oligomer backbone and terminal functionality is examined using thermal analysis.

Original languageEnglish
Article number40875
JournalJournal of Applied Polymer Science
Volume131
Issue number19
DOIs
Publication statusPublished - 5 Oct 2014

Keywords

  • crosslinking
  • differential scanning calorimetry
  • thermal properties
  • thermoplastics
  • thermosets

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