Two samples of PVC thin slices materials were prepared by KBr pressing slices and tested with FT IR;X ray fluorometer and ICP The results show that:(1) The material quality of one kind of thin slice plastics(Z) are PVC resin,the plastifier containing the ester and a little additive;(2) The other kind of thin slice plastics(Y) consists of PVC resin,the plastifier containing the ester,CaCO 3 and a little additive;(3) The additives of Z and Y kind are same:organic tin as thermal stabilizer,something containing sulphur as light and oxygen stabilizer and TiO 2,as white cozer agent.
The catalysts of nanometer TiO 2/BuOH and hydrous TiO 2 were prepared by the liquid phase method from Ti(SO 4) 2. The properties of the catalysts were characterized by TG DTA, IR, XRD, TEM methods. The results showed that nanometer TiO 2/BuOH was anatase particles with 10 nm×20 nm. The main product in styrene epoxidation with t butyl hydroperoxide(TBPH) was styrene epoxide, by product was phenylformaldehyde under the condition of 80 ℃ for 6 h. Hydrous TiO 2 prepared below 260 ℃ was non crystal powder and converted into anatase particles with 10 nm×300 nm when it was roasted at 500 ℃ . The catalytic activity of 10 nm×300 nm anatase particles had only 50% that of particles with 10 nm×20 nm. The centers of acid on the catalyst surface made the epoxide selectivity decrease obviously. The order of the influence of solvent on epoxidation reaction: 1,2 dichloroethane>butanol>cyclohexanone>methyl cyclohexane>cyclohexanol>acetic acid.
