Photostabiliztion of poly(vinylchloride) by bis(2-amino acetate benzothiazole) complexes

 In this work , Bis(2-amino acetate benzothiazole) chelate  complexes were prepared . These compounds are:
1- Bis(2-amino acetate benzothiazol) nickel(II).
2- Bis(2-amino acetate benzothiazol) copper(II).
3- Bis(2-amino acetate benzothiazol) zinc(II).
4- Bis(2-amino acetate benzothiazol) cadmium(II).
5- Bis(2-amino acetate benzothiazol) tin(II).
Infrared, ultraviolet–visible, spectrophotometric techniques, magnetic susceptibility, atomic absorption  conductivity measurement and other physical properties were used to characterize the free ligand and the above chelat  complexes.All these compounds were act as stabilizer in PVC films. The rate of photodegradation and photostabilization of PVC film (thickness 30mm) were monitored by measuring the carbonyl, polyene and hydroxyl indices (IIpo  and I) values as afunction with irradiation time and ultraviolet–visible spectrophotometry using the  concentrations of additive 0.5% wt/wt. The light of oHco,wavelength 313 nm with intensity (1.052*10-8 ein.dm-3.S-1) was used for irradiationof polymer films at room temperature.It was found that the carbonyl index (Ico) polyene index (I) and hydroxylindex(IoHpo) values increased with irradiation time, and this increase depend on the type of additives (free ligand and complexes).