the effects of temperature, time and the strategy of prepolymerization were studied on the morphology of polypropylene particles. propylene polymerization was carried out in slurry phase using 4th generation of ziegler-natta catalyst, cyclohexylmethyl dimethoxysilane as external electron donor, and triethyl aluminum as co-catalyst. prepolymerizations were carried out based on two strategies: is...

Understanding the structure and properties of MgCl2/TiCl4 nanoclusters is a key to uncovering origin Ziegler–Natta catalysis. In particular, vibrational spectroscopy can sensitively probe morphology active species MgCl2/TiCl4. Here, we determined spectroscopic fingerprints 50MgCl2 50MgCl2/3TiCl4 which were obtained by nonempirical determination based on an evolutionary algorithm DFT. The adsorp...