Hydrogen-Assisted Unique Incorporation of 1,4-Divinylbenzene in Copolymerization with Propylene Using an Isospecific Zirconocene Catalyst
Hydrogen-Assisted Unique Incorporation of 1,4-Divinylbenzene in Copolymerization with Propylene Using an Isospecific Zirconocene Catalyst
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DOI：
10.1002/marc.200500637
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发表时间：
2005-12
影响因子：
4.6
通讯作者：
Chengang Cao;Jin‐Yong Dong;T. Chung
中科院分区：
文献类型：
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作者：
Chengang Cao;Jin‐Yong Dong;T. Chung
用rac-Me2Si(2- me -4- ph - ind) 2 zrcl2和MAO在氢存在下与1,4-二乙烯基苯（1,4- dvb）共聚丙烯。所得共聚物的1h NMR谱证实了1,4- dvb的成功掺入。13c核磁共振分析揭示了一种独特的共聚物结构，加入的1,4- dvb单元主要在聚合物主链上形成1,4取代苯基重复单元。提出了一种可能的机制，涉及末端苯乙烯自发插入到Zr-H物种中，以使1,4- dvb的独特结合合理化。
Propylene was copolymerized with 1,4-divinylbenzene (1,4-DVB) using rac-Me2Si(2-Me-4-Ph-Ind) 2 ZrCl 2 and MAO in the presence of hydrogen. 1 H NMR spectra of the obtained copolymer confirmed the successful incorporation of 1,4-DVB. 13 C NMR analysis revealed a unique copolymer structure with the incorporated 1,4-DVB units predominantly forming 1,4-substituted phenyl repeating units in the polymer main chain. A plausible mechanism involving spontaneous insertion of terminal styryl into Zr-H species was proposed to rationalize the unique incorporation of 1,4-DVB.