TY - JOUR
T1 - LLDPE preparation by in situ copolymerization of ethylene using matallocene/ (2-Me-S-ClPh)2 PBIMe2 FeCl2/MAO tandem catalyzers
AU - Wang, Ruyi
AU - Zheng, Yuansuo
AU - Cui, Nannan
AU - Zhang, Zhicheng
AU - Ke, Yucai
AU - Hu, Youliang
PY - 2005/2
Y1 - 2005/2
N2 - A novel late transitional metal catalyst-(2-Me-3-ClPh) 2PBIMe2FeCl2 - has been synthesized having a high oligomerization activity up to 1.0 X 107g oligomer/(mol Fe·h). Using this oligomerization catalyst and metallocene catalyst - rac-C2H 4 (Ind)2ZrCl2 - as a dual functional catalyst system, MAO as the only cocatalyst, Linear Low Density Polyethylene (LLDPE) has been prepared by in situ copolymerization of ethylene having a high activity [> 106 g PE/(mol cat·h)]. 13 C-NMR shows that the LLDPE is obtained. In addition, the presence of unreacted α-olefin was not detected since there is no evident resonance signal at 29.29 and 29.42, which proves that this dual functional catalyst system has a good match during in situ copolymerization. With increasing the Fe/Zr ratio, the densities of polymers and the melting points of polymers obtained from DSC are in a descending trend. Meanwhile, the similar phenomenon is also found when the reaction temperature decreases.
AB - A novel late transitional metal catalyst-(2-Me-3-ClPh) 2PBIMe2FeCl2 - has been synthesized having a high oligomerization activity up to 1.0 X 107g oligomer/(mol Fe·h). Using this oligomerization catalyst and metallocene catalyst - rac-C2H 4 (Ind)2ZrCl2 - as a dual functional catalyst system, MAO as the only cocatalyst, Linear Low Density Polyethylene (LLDPE) has been prepared by in situ copolymerization of ethylene having a high activity [> 106 g PE/(mol cat·h)]. 13 C-NMR shows that the LLDPE is obtained. In addition, the presence of unreacted α-olefin was not detected since there is no evident resonance signal at 29.29 and 29.42, which proves that this dual functional catalyst system has a good match during in situ copolymerization. With increasing the Fe/Zr ratio, the densities of polymers and the melting points of polymers obtained from DSC are in a descending trend. Meanwhile, the similar phenomenon is also found when the reaction temperature decreases.
KW - In situ copolymerization
KW - Late transitional metal catalyst
KW - Linear low density polyethylene
UR - https://www.scopus.com/pages/publications/18844411352
M3 - 文章
AN - SCOPUS:18844411352
SN - 1000-3304
SP - 132
EP - 136
JO - Acta Polymerica Sinica
JF - Acta Polymerica Sinica
IS - 1
ER -