Thermogravimetric study of some crosslinked copolymers based on poly(acrylonitrile-co-divinylbenzene)

Author

E.C.RiquezaaA.P.de AguiaraM.R.M.P.de AguiarbL.C.de Santa Mariab

a

Departamento de Engenharia Química, Instituto Militar de Engenharia, Praça General Tibúrcio, 80 Rio de Janeiro, RJ 22290-270, Brazil

b

Instituto de Química, Universidade do Estado do Rio de Janeiro, R. São Francisco Xavier, 524 Rio de Janeiro, RJ 20559-900, Brazil

Received 20 June 2006, Revised 4 February 2007, Accepted 20 February 2007, Available online 27 February 2007.

Abstract

Copolymer networks based on acrylonitrile (AN)/divinylbenzene (DVB) have been investigated by thermogravimetric analysis (TG) to evaluate their thermal stability in nitrogen atmosphere. Thermal stability was determined from TG-DTG curves to investigate the influence of AN and DVB in the synthesis of copolymers on the copolymer thermal properties. The TG and DTG curves of copolymers clearly show two thermodegradation stages. The solid residues produced after thermodegradation stages were analyzed by FTIR and elemental analysis (CHN). The decomposition temperatures were dependent on amount of AN and DVB used as the crosslinking agent. The degradation temperatures of copolymers were influenced by the diluent system during their synthesis. FTIR analyses indicate that the cyclization of the polymer proceeds before any mass loss.

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