Abstract
With TiCl4/MgCl2 (Ti) and Al(i-Bu)3 (Al) as catalysts, the thermoplastic copolymer of 1-butene(Bt) and 1-hexene(He) was synthesized successfully. The effects of Bt/He, Ti/(He+Bt), Al/Ti, temperature and reaction time on conversion, catalyst efficiency(CE), intrinsic viscosity([η]) and insoluble content were studied. The copolymer was analyzed with Fourier transform-infrared (FTIR) and nuclear magnetic resonance (1H-NMR). Results showed that the optimal polymerization conditions were: He/Bt = 0.25, temperature 40°C−50°C, Al/Ti = 400−500, Ti/(Bt+He) = 3 × 10−5 − 4 × 10−5, time 4 h. Intrinsic viscosity was found to increase with increasing Ti/(Bt+He) and decreasing Al/Ti and polymerization temperature. When the molar content of He, Al/Ti and polymerization temperature increased, the insoluble content in CH2Cl2 of copolymers decreased. When Ti/(Bt+He) and reaction time increased, the insoluble content in CH2Cl2 of copolymers also increased. The crystallization and stereoregularity of poly(1-butene) decreased with the addition of He.
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Translated from China Synthetic Rubber Industry, 2006, 29(6): 429–434 [译自: 合成橡胶工业]
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Zhao, Y., Shao, H., Wang, B. et al. Copolymerization of 1-butene and 1-hexene with supported titanium catalyst. Front. Chem. Eng. China 1, 304–309 (2007). https://doi.org/10.1007/s11705-007-0056-y
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DOI: https://doi.org/10.1007/s11705-007-0056-y