Exploring Structure–Property Relationships in Aromatic Polybenzoxazines Through Molecular Simulation

Scott Thompson, Corinne A Stone, Brendan J. Howlin, Ian Hamerton

Research output: Contribution to journalArticle (Academic Journal)

1 Citation (Scopus)
221 Downloads (Pure)

Abstract

A series of commercial difunctional benzoxazine monomers are characterised using thermal and thermo-mechanical techniques before constructing representative polymer networks using molecular simulation techniques. Good agreement is obtained between replicate analyses and for the kinetic parameters obtained from differential scanning calorimetry data (and determined using the methods of Kissinger and Ozawa). Activation energies range from 85-108 kJ/mol (Kissinger) and 89-110 kJ/mol (Ozawa) for the uncatalysed thermal polymerisation reactions, which achieve conversions of 85-97 %. Glass transition temperatures determined from differential scanning calorimetry and dynamic mechanical thermal analysis are comparable, ranging from the polymer containing the bisphenol A moiety (151 °C, crosslink density 3.6 x 10-3 mol cm-3) to the polymer, based on a phenolphthalein bridge (239-256 °C, crosslink density 5.5-18.4 x 10-3 mol cm-3, depending on formulation). Molecular dynamics simulations of the polybenzoxazines generally agree well with empirical data, indicating that representative networks have been modelled.
Original languageEnglish
Article number1250
Number of pages15
JournalPolymers
Volume10
Issue number11
Early online date12 Nov 2018
DOIs
Publication statusPublished - Nov 2018

Keywords

  • Polybenzoxazines
  • polymerisation kinetics
  • thermal stability
  • molecular dynamics simulation

Fingerprint Dive into the research topics of 'Exploring Structure–Property Relationships in Aromatic Polybenzoxazines Through Molecular Simulation'. Together they form a unique fingerprint.

Cite this