Abstract: The solution of polyvinylchloride with a phase transfer catalyst-tetrabutylammonium bromide (TBAB) was casted into film, then it was immersed in aqueous sodium hydroxide solution for de-hydrochlorination. The structure of the product was characterized by FTIR and UV-VIS spectropho-tometry. Comparing with Kise's method we found that the elevated extent of reaction rate and conversion in the system of PVCwas more remarkable than that in the system of PVDF, and a considerable concentration of very long trans-(CH)_x, chain sequences was induced. We studied the effects of temperature, time and the quantity of catalyst used on the reaction and the best reaction condition was obtained.

Key words: Dehydrochlortnation, Polyvinylchloride, Phase transfer catalyst