Catalyzing carbonization function of ferric chloride based on acrylonitrile–butadiene–styrene copolymer/organophilic montmorillonite nanocomposites

详细信息    查看全文

• 作者：Yibing Cai ; Yuan Hu ; Lei Song ; Shanyong Xuan ; Yi Zhang ; Zuyao Chen ; Weicheng Fan
• 关键词：ABS ; Ferric chlorides ; OMT ; Nanocomposites ; Catalyzing carbonization
• 刊名：Polymer Degradation and Stability
• 出版年：2007
• 出版时间：March 2007
• 年：2007
• 卷：92
• 期：3
• 页码：490-496
• 全文大小：867 K

文摘

A study on the Lewis acids-type transition metal chloride (FeCl₃) catalyzing carbonization based on acrylonitrile–butadiene–styrene copolymer (ABS)/organophilic montmorillonite (OMT) nanocomposites has been achieved. The results of XRD, TEM and HREM experiments show the formation of intercalated structure. The thermal stability of the nanocomposites slightly decreases, but the char residue remarkably increases compared with pure ABS. Meanwhile, it is found that the loading of FeCl₃ leads to crosslinking of ABS, promotes the charred residue yield and catalytic graphitization effect. The structure and morphology (XRD, HREM, SAED and LSR) of the purified char residue approve further the presence of graphite sheets. The possible catalyzing carbonization mechanism is composed of three prominent aspects. The first is the catalyzing effect of FeCl₃ promoting the crosslinking of polymer. The second is the Hofmann degradation of OMT, whose degraded products have opposite role in promoting crosslinking reactions and the last is the nano-dispersed clay layers. The gas barrier properties of clay stop or reduce the release of the pyrolytic products, which have been dehydrogenated for more time and aromatized to form char.