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Thermal degradation studies on PMMA–HET acid based oligoesters blends

2009; Springer Science+Business Media; Volume: 100; Issue: 2 Linguagem: Inglês

10.1007/s10973-009-0266-2

1588-2926

T. Rajkumar, Chinnaswamy Thangavel Vijayakumar, Palanichamy Sivasamy, B. Sreedhar, Charles A. Wilkie,

Thermal and Kinetic Analysis

Imparting thermal stability to polymethyl methacrylate (PMMA) without affecting its optical clarity is attempted by incorporating HET acid based oligoesters. Pure PMMA and PMMA containing five and 20 wt% of four different oligoesters are separately prepared using bulk polymerization. The thermal properties of the materials studied using DSC, TG, TG–FTIR and Pyr–GC–MS are presented. The main volatile degradation products identified are CO, HCl, CO2, H2O, hexachlorocyclopentadiene, hexachloroendomethylene tetrahydrophthalic acid/anhydride and methyl methacrylate. A detailed mechanism for the influence of the degradation products of HET acid based oligoesters on the thermal degradation of PMMA is also presented.