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Citation: JIANG Jie, XIE Ben-Heng, WU Qing, LIN Shang-An. Synthesis of High Molecular Weight Atactic Polypropylene——Polymerization in Alkane and Preliminary Characterization of the Products[J]. Chinese Journal of Applied Chemistry, ;2000, 17(3): 292-295. shu

Synthesis of High Molecular Weight Atactic Polypropylene——Polymerization in Alkane and Preliminary Characterization of the Products

1.
Institute of Polymer Science, Zhongshan University, Guangzhou 510275

Received Date: 4 November 1999
Available Online: 29 February 2000
Fund Project: 广东省自然科学基金资助项目(980327) (980327)

The propylene polymerization in the presence of monocyclopentadienyltitanium compound and methylaluminoxane(MAO) carried out in an autoclave. The effect of different solvents on the propylene polymerization was compared. With the raise of n(Al)/n(Ti) ratio, the activity of the catalyst increased firstly and then decreased, but the molecular weight of PP was independent of it. The catalytic activity increased linearly with monomer pressure, while the molecular weight of the polymer decreased slightly with an increase in monomer pressure. The products were characterized by ¹³C NMR, DSC and tensile strength measurement. The high molecular weight atactic polypropylene had a good elasticity.
- propylene polymerization,
- metallocene catalyst,
- atactic polypropylene,
- stereo structure
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