Unperturbed dimensions of poly-p-chlorostyrene

✍ Scribed by I. Hernández-Fuentes; M.G. Prolongo

• Publisher: Elsevier Science
• Year: 1979
• Tongue: English
• Weight: 244 KB
• Volume: 15
• Category: Article
• ISSN: 0014-3057
• DOI: 10.1016/0014-3057(79)90078-8

✦ Synopsis

Viscosity measurements on poly-p-chlorostyrene (PPCS) in benzene-methanol mixtures have been carried out at their corresponding theta temperatures determined by the phase separation method. Viscosity measurements were also run in benzene at the same temperatures. The Stockmayer-Fixman extrapolation method was applied to the data to obtain the chain unperturbed dimensions, K o. It was found that these, for PPCS in benzene, decrease with increasing temperature and that, both in benzene and in binary mixtures, they decrease with increasing values of the parameter a from the relationship [q] = KM". PPCS theta temperature in benzene was 8 .