Characterization of partially reduced poly(vinyl chloride) by different analytical techniques

• Published in: Polymer testing Vol. 18; no. 6; pp. 429 - 438
• Main Authors: Rao, P.V.C, Kaushik, V.K
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01-01-1999; Elsevier
• Subjects: Applied sciences; Chemical modifications; Chemical reactions and properties; Exact sciences and technology; Organic polymers; Physicochemistry of polymers; Chemical reduction; Ethylene derivative copolymer; Chemical modification; Molecular structure; Vinyl chloride copolymer; Unsaturated copolymer; Reaction mechanism; Polyvinyl chloride; Branched copolymer; Experimental study; Microstructure; Organic stannane
• ISSN: 0142-9418; 1873-2348
• DOI: 10.1016/S0142-9418(98)00047-6

An attempt has been made to study structural changes in partially reduced poly(vinyl chloride) (PVC) using tributyl tin hydride (Bu
3SnH) by X-ray photoelectron spectroscopy (XPS) and nuclear magnetic resonance (NMR) techniques. XPS results indicate that the decrease in chlorine content and the presence of Sn(3d) photoelectron lines suggest the formation of tin compound on the surface during the reduction process. The microstructures of partially reduced polymer indicate the presence of racemic structures of r-dyads in addition to small amounts of branched structures. Thermal behaviour (DSC) of reduced samples supplement the observed changes.