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在n-BuLi引发的丁二烯负离子聚合中,首次用C60Cln/C70Cln作为偶联剂进行偶联反应,并对偶联产物进行了粘度测试和GPC表征。GPC图中出现的新峰证明偶联产物的存在。粘度曲线则随偶联剂用量的增加出现双峰变化,这和用SiCl4偶联时出现的单峰不同。
In the n-BuLi initiated butadiene anionic polymerization, the coupling reaction was carried out with C60Cln / C70Cln as the coupling agent for the first time, and the coupled product was tested for viscosity and GPC. The new peak appearing in the GPC chart demonstrates the presence of the coupling product. The viscosity curve shows a bimodal change with the increase of the amount of coupling agent, which is different from that of single peak when it is coupled with SiCl4.