Influence of the chemical structure on the kinetics of the structural relaxation process of acrylate and methacrylate polymer networks

M. Salmerón Sánchez, Y. Touzé, A. Saiter, J. M. Saiter, J. L. Gómez Ribelles

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

The enthalpy relaxation of poly(hydroxyethyl methacrylate) (PHEMA), poly(ethyl methacrylate) (PEMA) and poly(ethyl acrylate) (PEA) networks, obtained by DSC, are compared. The temperature interval of the glass transition broadens in the sequence PEA-PEMA-PHEMA. The plots of the enthalpy loss during the annealing for 200 min at different temperatures below Tg show that the structural relaxation process also takes place in PHEMA in a broader temperature interval than in PEA or PEMA. The modelling of the structural relaxation process using a phenomenological model allows determining the temperature dependence of the relaxation times concluding that the fragility in PHEMA is significantly lower than in PEMA. Both features are ascribed to the connectivity of the polymer chains in PHEMA via hydrogen bonding. The role of the presence of the methyl group bonded to the main chain is analysed by comparing the results obtained in PEA and PEMA.

Original languageEnglish
Pages (from-to)711-720
Number of pages10
JournalColloid and Polymer Science
Volume283
Issue number7
DOIs
Publication statusPublished - Apr 1 2005
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry
  • Polymers and Plastics
  • Colloid and Surface Chemistry
  • Materials Chemistry

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