Ti－Mg系载体催化剂乙烯加氢预聚合对乙烯气相聚合的影响

Effect of Ethylene Prepolymerization in C_2H_4/H_2 Atmosphere with Ti-Mg Catalyst on Gas-phase Ethylene Polymerization

Ｔｉ－Ｍｇ系载体催化剂乙烯加氢预聚合对乙烯气相聚合的影响李悦，林尚安（东莞理工学院应用化学系，东莞，５１１７００）（中山大学高分子研究所）关键词Ｚｉｅｇｌｅｒ－Ｎａｔｔａ催化剂．预聚合催化剂．乙烯气相聚合乙烯聚合特别是气相聚合十分注意聚合初活性的调节...

Ti-Mg catalyst treated by novel prepolymerization in C_2H_4/H_2 atmosphere shows a high activity and non-decaying kinetic profiles in gas-phase ethylene polymerization.The prepolymerization drastically reduces the initial polymerization rate and increases the bulk density (BD) of the resulting polymer product, exhibiting a similarity to the prepolymerization in C_2H_4/N_2 atmosphere, Characterization of the resulting polymer particle by SEM demonstrates bound agglomerates of fine secondary polymer globules for the polymer surface,which could be effective for increasing BD of the product.