Abstract
Thermal stability and thermal decomposition behaviour of plasticized PVC poly (vinyl chloride) and crosslinked plasticized PVC films has been studied. Two effective crosslinking agents have been used: the sodium salt of γ-mercaptopropyltrimethoxysilane (MSi) and γ-aminopropyltriethoxysilane (ASi). Clear differences have been observed in the thermogravimetric behaviour of the different samples. MSi crosslinked films show a certain delay in the decomposition process as compared to plasticized PVC as well as three clear decomposition processes, probably involving the plasticizer and different fractions produced in the crosslinking reactions. In the case of the films prepared with ASi a single decomposition stage is observed at temperatures much lower than those obtained in the other PVC films studied, showing the strong influence of this compound in the thermal behaviour of plasticized PVC. ©
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