HE Aihua, YAO Wei, JIA Zhifeng, HUANG Baochen, JIAO Shuke. SYNTHESIS OF HIGH trans-1,4-BUTADIENE-ISOPRENE COPOLYMERS BY SUPPORTED TITANIUM CATALYSTS[J]. Acta Polymerica Sinica, 2002,(1):19-24.
HE Aihua, YAO Wei, JIA Zhifeng, HUANG Baochen, JIAO Shuke. SYNTHESIS OF HIGH trans-1,4-BUTADIENE-ISOPRENE COPOLYMERS BY SUPPORTED TITANIUM CATALYSTS[J]. Acta Polymerica Sinica, 2002,(1):19-24.DOI:
Butadiene(Bd) and isoprene(Ip) were copolymerized with TiCl4/MgCl2-Al(i-Bu)3 catalyst system.The effect of polymerizafion conditions such as feed ratio
temperature
Al/Ti mole ratio
Ti/M mole ratio and comonomer concentration on catalytic efficiency and intrinsic viscosity of the copolymers was investigated in details.The DSC results indicated that the products with low butadiene feed ratio(f01≤20%) were copolymers.IR and 1H-NMR spectra analysis of the copolymers showed that the copolymers were mainly trans-1
4-structure. Ip units of the copolymers had trans-1
4-contents above 98% and Bd units had trans-1
4-cntents above 90% and copolymerization conditions had little effects on micro-structure of the copolymers.It was found that the reaction activity of Bd was greater than that of Ip.