Preparation and thermal and thermo-oxidative stability of vinylidene chloride-co-vinyl chloride copolymer/synthetic hectorite nanocomposites

✍ Scribed by Tar-Hwa Hsieh; Ko-Shan Ho; Hsiaotao T. Bi; Jan-Kuan Hung; Yu-Kai Han; Shin-Shiao Yang; Yu-Chen Chang

• Publisher: John Wiley and Sons
• Year: 2009
• Tongue: English
• Weight: 344 KB
• Volume: 113
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/app.29916

✦ Synopsis

Abstract

Poly(vinylidene chloride‐co‐vinylchloride)/organically modified hectorite (VDC‐VC/SPN) nanocomposites were prepared by melt blending VDC‐VC copolymer with SPN in the presence of dioctyl phthalate, which acted as a plasticizer. As a result, the exfoliated structure was found in the VDC‐VC/SPN nanocomposites. In nitrogen atmosphere, VDC‐VC/SPN nanocomposites exhibited a single‐step thermal degradation. The thermal stability of VDC‐VC/SPN nanocomposites is significantly influenced by the SPN, which was modified with long alkyl ternary ammonium salt. In air atmosphere, VDC‐VC/SPN nanocomposites revealed a two‐step thermo‐oxidative degradation behavior. At the first degradation stage, the weight loss pattern is similar to that of VDC‐VC composites in nitrogen, in which the thermo‐oxidative stability of VDC‐VC/SPN nanocomposites is affected by the ternary ammonium salt and oxygen rather than its morphology. At the second degradation stage, both the enhanced thermo‐oxidative stability and the flame‐retardation ability of VDC‐VC composites are strongly and closely related to the morphology of nanocomposites. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci ,2009