Authors: X. Cai 1 and H. Shen 2
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  • 1 Fudan University Department of Chemistry Shanghai 200433 Shanghai 200433
  • 2 Shanghai Imp. & Exp. Commodity Inspection Bureau of the People's Republic of China Shanghai 200092 P. R. China Shanghai 200092 P. R. China
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When ethylene-vinyl acetate copolymer, EVA, is heated, a two-stage thermal degradation occurs following its melting. The vinyl acetate content of the copolymer was determined to be 43.8% by using TA 2950 and TA 2050 thermogravimetric instruments. TG/FTIR was used to detect the evolved gas. Acetic acid and trans-1-R-4-R'-cyclohexane were the main products evolved from EVA in the first and second stage, respectively. The apparent activation energies were determined for both stages by differential methods.