The prepolymerization with Ti-Mg Catalyst and the influence of products of prepolymerization on the gas-phase polymerization of ethylene are reported.

A kind of waterborn polyurethane is synthesized by the reaction of diisocyanate with polyethylene glycol at the presence of end capping reagent;The factors that affect the blocking reaction and prepolymerization reaction were investigated.

The influence of reaction temperature, used solvents and catalysts on the prepolymerization reaction was investigated.

The results indicated that the optimum reaction temperature of prepolymerization reaction was 75℃,the maximum reaction temperature of prepolymer was between 60℃ and 80℃,the quantity of hydrophilic chain extender was equal to 5% of feedstocks.

Research of reaction conditions on prepolymerization of polyester anionic waterborne polyurethane emulsion;

Bulk polymerization of ABS resin Ⅱ.Study on prepolymerization kinetics

Application of Room Temperature Ionic Liquids in Polymerization;

Influences of the using amount of emulsifier and stirring condition on the particle size in heterogeneous polymerization system;

Study on the Surfactant Used in Polymerization in Supercritical Carbon Dioxide;

The effect of micro amount water on the polymerization reaction of cis-1,4-polybutadiene rubber;

Progress of butyl rubber production status and polymerization reaction was summarized.

The impact of catalyst activity on polymerization reaction and product quality is discussed and improvement measures are proposed.