Fluorescence spectra of ladderlike polyphenylsilsesquioxane (LPPS) and ladderlike 1,4-phenylene-bridged polyvinylsiloxane (LPPVS) have been measured as a functi
In this paper, highly active Ziegler-Natta catalysts of MgCl<sub>2</sub> supported TiCl<sub>4</sub> for synthesis ofpolyolefins, using di-n-butyl phthalate (DNBP