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Citation: YAN Wei-Dong, LIU Li-Xin, JIANG Tao, LI Dan, ZHOU Nai, HU You-Liang. Syndiotactic Polystyrene Catalytically Prepared over β-Diketonate Titanium Complex/MAO and Its Thermal Properties[J]. Chinese Journal of Applied Chemistry, ;2001, 18(2): 116-119. shu

Syndiotactic Polystyrene Catalytically Prepared over β-Diketonate Titanium Complex/MAO and Its Thermal Properties

YAN Wei-Dong ^a ,
LIU Li-Xin ^b ,
JIANG Tao ^b ,
LI Dan ^b ,
ZHOU Nai ^c ,
HU You-Liang ^c

1.
a School of Chemical Engineering, Hebei University of Technology, Tianjin;
2.
b Daqing Petroleum Institute, Anda;
3.
c State Key Laboratory of Engineering Plastics, Center for Molecular Science, Institute of Chemisry, Chinese Academy of Sciences, Beijing 100080

Received Date: 19 July 2000
Available Online: 6 November 2000
Fund Project: 中国科学院-中国石化集团公司高分子化学联合开放实验室资助项目黑龙江省自然科学基金项目(B9905) (B9905)

The syndiospecific polymerization of styrene was carried out via U-diketonate titanium complex/MAO. The polymerization activity approached to 6.2×10⁵ g/(mol·h) in reaction conditions:catalyst 4.3×10^-4 mol/L, molar ratio of aluminum to titanium 500:1, 80℃ and 1 h. The melting temperature of the syndiotactic polystyrene was about 267℃. The effects of molar ratio of aluminum to titanium, concentration of U-diketonate titanium complex and temperature on polymerization were investigated. The polymer was characterized by ¹³C NMR and DSC. The thermal properties of the syndiotactic polystyrene were discussed.
- syndiotactic polystyrene,
- styrene,
- syndiospecific polymerization,
- U-diketonate titanium complex,
- thermal property
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