Polyfvinyl chloride stabilisers

Whilst such stabilisers have found use in many chlorine-containing polymers their main application has been with polyfvinyl chloride). These additives will be considered in Chapter 12. 

Figure 6.6. Effect of temperature on the 1000 Hz dielectric constant of stabilised polyfvinyl chloride)-tritolyl phosphate systems. (Copyright 1941 by the American Chemical Society and reprinted by permission of the copyright holder)...

The main progress in the science of ageing and stabilisation of polymers has generally been related to large tonnage carbochain polymers polyolefins, polyfvinyl chloride), rubbers, acrylic polymers. This is a consequence of not only their interest to industry, but also of the existence of fundamental investigations of cracking and oxidation of individual aliphatic compounds. 

The most efficient way is to store the samples deep-frozen immediately after sampling, using polyethylene or polycarbonate containers. Under this condition, TBT was shown to be stable for 2-3 months. Polytetrafluoroethylene (PTFE) as the container material was shown to cause species loss, most probably owing to the porosity of this material. Polyfvinyl chloride) (PVC) bottles must be ruled out as container material, because PVC contains TBT for UV stabilisation which has been found to leach out of PVC containers and also from PVC tubes used for water supply. Several reviews on this topic can be found. ... 

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