Effect of slight crosslinking on the mechanical relaxation behavior of poly(2-ethoxyethyl methacrylate) chains

M. Carsí, M. J. Sanchis, R. Díaz-Calleja, E. Riande, M. J.D. Nugent

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

The synthesis, thermal and mechanical characterizations of uncrosslinked and lightly crosslinked poly(2-ethoxyethyl methacrylate) are reported. The uncrosslinked poly(2-ethoxyethyl methacrylate) exhibits in the glassy state two relaxations called in increasing order of temperature, the gamma and beta processes respectively. These are followed by a prominent glass-rubber or alpha relaxation. By decreasing the chains mobility by a small amount of crosslinking, the beta relaxation disappears and the peak maximum associated with the alpha relaxation is shifted from 268 K to 278 K, at 1 Hz. An investigation of the storage relaxation modulus of the crosslinked polymer indicates two inflexion points that presumably are related to segmental motions of dangling chains of the crosslinked networks and to cooperative motions of the chains between crosslinking points. Nanodomains formed by side-groups flanked by the backbone give rise to a Maxwell-Wagner-Sillars relaxation in the dielectric spectra that have no incidence in the mechanical relaxation spectra.

Original languageEnglish
Pages (from-to)1495-1502
Number of pages8
JournalEuropean Polymer Journal
Volume49
Issue number6
DOIs
Publication statusPublished - Jun 2013

Keywords

  • Crosslinking
  • Dynamic-mechanical spectroscopy
  • Nanodomains structure
  • Poly(2-ethoxyethyl methacrylate)

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