Thermal degradation of poly 2-[3-(6-tetralino)-3-methylcyclobutyl]-2-ketoethyl methacrylate


Erol I., SOYKAN C., Ilter Z., Ahmedzade M.

Polymer Degradation and Stability, vol.81, no.2, pp.287-295, 2003 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 81 Issue: 2
  • Publication Date: 2003
  • Doi Number: 10.1016/s0141-3910(03)00099-5
  • Journal Name: Polymer Degradation and Stability
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.287-295
  • Keywords: 2-[3-(6-Tetralino)-3-methylcyclobutyl]-2-ketoethyl methacrylate, Activation energies, Thermal degradation
  • Uşak University Affiliated: Yes

Abstract

The thermal degradation of poly 2-[3-(6-tetralino)-3-methylcyclobutyl]-2-ketoethyl methacrylate [poly(TKEMA)] has been studied using a system consisting of a degradation tube, with a condenser for product collection, a gas-phase IR cell and a rotary pump and by thermogravimetry (TG). The investigation of the nature of the evolved products has been supplemented by studies of structural changes in the degrading polymer by FT-IR spectroscopy. Changes have been investigated under programmed heating at 10 °C/min from room temperature to 500 °C. In degradation of [poly(TKEMA)], product identification studies were done using FT-IR, 1H and 13C NMR and gas chromatography-mass spectroscopy. Depolymerization is the main reaction in thermal degradation of the polymer. The degradation produces anhydride ring structures in the chain at temperatures up to about 300 °C. The cleaving of ketone, aldehyde, tetralin compounds from side chains of the polymers is a common reaction for the polymers. A mechanism of degradation showing the formation of some of these products is discussed. The activation energy for the thermal degradation of [poly(TKEMA)] is 210 kJ/mol in the first stage, observed at 220-330 °C. The second stage decomposition commenced at 330-430 °C and the energy of activation was 125 kJ/mol. © 2003 Elsevier Science Ltd. All rights reserved.