Degradation behavior of poly(vinyl chloride) (PVC) was analyzed by means of
simultaneous thermogravimetry-mass spectrometry (TG-MS). Weight loss and t
he production behavior of hydrogen chloride and organic materials with PVC
degradation was clearly divided into three stages at lower heating rate. De
hydrochlorination was occurred mainly in the first and second stages. Benze
ne was formed mainly in the first stage with dehydrochlorination.