Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/7307
Title: Organotin compounds as PVC stabilizers
Authors: Arkış, Esen
Keywords: CVD tin compounds
Organotin stabilizer concentration
Issue Date: Sep-2008
Publisher: Wiley
Source: Arkış, E. (2008). Organotin compounds as PVC stabilizers. In A. G. Davies, M. Gielen, K. H. Pannell and E. R. T. Tiekink /Eds.), Tin Chemistry: Fundamentals, Frontiers, and Applications, (pp. 312-323). Chichester, UK : Wiley. doi:10.1002/9780470758090.ch3
Abstract: When poly(vinyl chloride) is fabricated, it passes between rollers (calendars) at about 200 ◦C, which causes elimination of some HCl at allylic defects in the polymer, as shown below (Figure 3.3.1). Furthermore, the released HCl induces further elimination, giving a polyolefin structure with a yellow coloration, which turns red, and then black, after which the polymer becomes brittle. This degeneration can be inhibited by organotin stabilizers, often organotin mercaptides that appear to have two principal functions. Firstly, they react with the HCl to give organotin chlorides, which do not catalyze the elimination process. Secondly, they substitute the chloride at the reactive sites, introducing other groups, such as mercaptide groups, which are not easily eliminated. Organotin maleates may also remove diene units by the Diels–Alder reaction.
URI: https://doi.org/10.1002/9780470758090.ch3
https://hdl.handle.net/11147/7307
ISSN: 978-047051771-0
Appears in Collections:Chemical Engineering / Kimya Mühendisliği
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection

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