【摘要】 用裂解气相色谱法(PGC)进行了聚氯乙烯—红泥塑料(PVC—RM)的结构表征。研究了聚氯乙烯(PVC) 和PVC—RM经不同热处理时间后(170℃),裂解表征产物的变化规律和产率差异。研究了PVC—RM的内耗(tanδ)与温度的关系,PVC—RM的玻璃化温度(Tg)为85℃。研究表明:PVC—RM不是PVC和RM(红泥)的简单共混物。在RM的作用下,PVC分子链支化碳原子上的活泼氯原子发生取代反应,形成C—O—Si键。因此,PVC—RM的高温裂解机理与PVC不同,且热稳定性较高。更多还原

【Abstract】 Characterization by means of Curie-point pyrolysis gas chromatography was carried out with stainless steel columns (2m×4mm i.d.) packed with silicone oil (1) on 102 support (60-80 mesh) . The column temperature was kept at 110℃and the flow rate of the mobile phase (N2) . Typical pyrograms of poly-vinyl chloride, polyvinyl chloride-red mud and mixtures of polyvinyl chloride and red mud are obtained at degradation temperature of 460℃ for 2 sec. The relationship’s between heating time (at 170℃) and the yields of degradation products from polyvinyl chloride-red mud and that between pyrolysis tempera-lure and tan & of polyvinyl chloride-red mud were investigated. The composite seems not a simple mixture of polyvinyl chloride and red mud.更多还原