Abstract
In this study, the thermal gelation points of a vinylidene chloride/acrylonitrile random copolymer have been determined using a spectrophotometric technique. In the first part, the thermal gelation temperature and the thermal gelation weight loss have been determined as 219°C and 4·6%, respectively. In the second part, isothermal gelation times at 150, 160, 170 and 180°C have been determined as 256, 105, 44 and 27 min, respectively. At these temperatures the isothermal gelation weight losses have been found to be 0·37, 0·68, 0·92 and 1·26%, respectively. In conclusion, it has been shown that the crosslinking reaction in vinylidene chloride/acrylonitrile copolymer begins at lower temperatures and weight losses in isothermal heating than in dynamic heating.
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