In situ copolymerization of ethylene to produce linear low‐density polyethylene by Ti(OBu)4/AlEt3‐MAO/SiO2/Et(Ind)2ZrCl2
作者： Bochao Zhu , Cunyue Guo , Zhongyang Liu , Yuanqi Yin
DOI: 10.1002/APP.21190
关键词:
摘要: Linear low-density polyethylene (LLDPE) is produced in a reactor from single ethylene feed by combining Ti(OBu)4/AlEt3, capable of forming α-olefins (predominantly 1-butene), with SiO2-supported Et(Ind)2ZrCl2 (denoted MAO/SiO2/Et(Ind)2ZrCl2), which able to copolymerize and 1-butene situ little interference the dual-functional catalytic system. The two catalysts system match well because employment triethylaluminum (AlEt3) as cocatalyst both Ti(OBu)4 MAO/SiO2/Et(Ind)2ZrCl2, exhibiting high polymerization activity improved properties obtained polyethylene. There noticeable increment when amount increases can be incorporated about 6.51 mol % backbone chains at highest concentration feed. molecular weights (Mw), melting points, crystallinity LLDPE descend decreases, attributed mainly chain termination branching degree, while weight distribution remains within narrow range case metallocene catalysts. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 94: 2451–2455,
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