Akademik Veri Yönetim Sistemi
Polymer Degradation and Stability, cilt.72, sa.1, ss.69-74, 2001 (SCI-Expanded)
The preparation and thermal degradation of two poly(p-substituted phenacyl methacrylates), poly(p-bromophenacyl methacrylate) [poly(BPMA)] and poly(p-methoxyphenacyl methacrylate [poly(MPMA)], are described. The monomers produced from the reaction of corresponding phenacylchlorides with sodium methacrylate, were polymerized with AIBN as initiator. The monomers and their polymers were characterized by IR, 1H and 13C NMR. Thermal degradation of the polymers 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). Product studies were performed by IR, GC-MS, 1H and 13C NMR. Thermal degradations of these two poly(p-substituted phenacylmethacrylates) to give volatile products, begin at about 250°C. The degradation produces anhydride ring structures in the chain at about 260°C. A mechanism of degradation showing the formation of some products is discussed. © 2001 Elsevier Science Ltd.