A Comparative Study on the Homo-, Co- and Ter-Polymerization Using Ethylene, 1-Decene and p-Methylstyrene

Catalysts

Dong Jin Yang¹  Hyun Jun Kim¹ 

[1] Convergent Technology R&D Division, Korea Institute of Industrial Technology, Ansan-si, Korea;

关键词: metallocene catalysts;    homopolymer;    copolymer;    terpolymer;   

DOI  :  10.3390/catal3010176

来源: mdpi

【 摘 要 】

We synthesized polyethylene (PE), poly(ethylene-co-1-decene), poly(ethylene-co-p-methylstyrene) and poly(ethylene-ter-1-decene-ter-p-methystyrene) using a rac-Et(Ind)₂ZrCl₂ metallocene catalyst and a methylaluminoxane cocatalyst system. The materials were characterized using nuclear magnetic resonance spectroscopy and Fourier transform infrared spectroscopy. We compared and studied the kinetics, thermal properties and mechanical ones of these polymers. T_g was related to the amorphous phase of the polymers, whereas the tensile strength and storage modulus (E’) were related to the crystalline phase. We also found that PE has the highest crystallinity through differential scanning calorimetry and wide-angle X-ray scattering analysis. The polymerization rates of poly(ethylene-co-1-decene) and poly(ethylene-ter-1-decene-ter-p-methystyrene) were always higher than that of polyethylene.

【 授权许可】

CC BY   
© 2013 by the authors; licensee MDPI, Basel, Switzerland.