Spherical MgCl2-supported Ziegler-Natta catalysts containing internal donors, such as diethyl phthalate, diisobutyl phthalate, and di-n-octyl phthalate, have been prepared. The effects of external donors, phenyltrimethoxysilane, phenyltriethoxysilane, and diphenyldimethoxylsilane, on the propylene polymerization catalyzed by these catalysts were studied. The results indicate that the external donors not only led to an increase in the isotactic index, but also affected the morphology of resultant polymer particles.

Here, the dendritic chloric poly (benzyl ether)(G1-Cl, G2-Cl and G3-Cl) as the macroinitiator for the controlled atom transfer radical polymerization (ATRP) of methyl methylacrylate was investigated. Polymers obtained were characterizated by GPC, 1H NMR, FT-IR, TGA and DSC. These dendritic-linear block polymers that consist of linear and dendritic segments have very good solubility in common organic solvents at room temperature. In a selective solvent (THF/H2O), polymers can self-assembled into the micelles that have a spherical morphology in shape due to the lowest of the surface energies.

The benzoyl-terminated multiarm hyperbranched poly (3-ethyl-3-oxetanethanol)(HBPO-B) was synthesized by reaction of terminal hydroxyl with benzoyl chloride in CH2Cl2 in the presence of pyridine and triethylamine (TEA) as the acceptors of HCl. The macroscopic self-assembly structures of hyperbranched benzoyl-terminated poly (3-ethyl-3-oxetanethanol) can be obtained via a simple solvent volatilizing route and generated multiwalled structures with millimeters in diameter and centimeters in length. Besides the molecular structures, the macroscopic self-assembly of hyperbranched benzoyl-terminated poly (3-ethyl-3-oxetanethanol) is also affected by other factors, such as the nature of the solvent, the molecular concentration, the volatilizing ratio of solvent, and self-assembly temperature.

Under atmospheric pressure, nano-polyethylene fibres were prepared via in situ ethylene extrusion polymerization, with MCM-41 and SBA-15 supported zirconocene dichloride (Cp2ZrCl2) catalytic systems, respectively. The effects of the geometrical structures and surface properties of MCM-41 and SBA-15 on the morphology of the resultant polyethylene, catalytic activity and polymerization rate were investigated and compared in various polymerization conditions. The possible formation mechanism of nano-polyethylene fibres with MCM-41 and SBA-15 supported Cp2ZrCl2 as catalyst was discussed.

A novel approach was applied to prepare shell thickness controllable magnetic microsphere precursor through the self-assembly of PDMS homopolymer with PFS-b-PDMS in selective solvent and adjusting the prepared onditions of samples such as temperature and aging time. The magnetic microsphere precursor provided with adjustable dimension of shell thickness 15, 40 and 90nm, respectively, which made it possessing various potential applications in biomedical and separating engineering fields.