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블릿 Title(Kor) *
블릿 Title(Eng) Fabrication of CNT/MgCl2-Supported Ti-based Ziegler-Natta Catalysts for Trans−selective Polymerization of Isoprene
블릿 Keyword Ziegler-Natta catalyst, trans-polyisoprene, carbon nanotubes, ball-milling
블릿 Author(Kor) *
블릿 Author(Eng) Lan Cao*,**, Xiaojie Zhang**, Xiaolei Wang*, Chengzhong Zong*, and Jin Kuk Kim**,†
블릿 Date 2018.09.30
블릿 Attach file 7 158-167김진국.pdf
블릿 Page Page. 158~167
블릿 Abstract(Kor)
*
블릿 Abstract(Eng)
In this study, in-situ trans-selective polymerization of isoprene was carried out using titanium-based Ziegler– Natta catalysts. The catalysts were prepared by high-energy ball milling. Individually Large-inner-diameter carbon nanotubes (CNTL), and hydroxylated carbon nanotubes (CNTOH), along with magnesium chloride (MgCl2) were used as the carriers for the catalysts. The optimum ball-milling time for preparing the CNT/MgCl2/TiCl4 Ziegler–Natta catalysts was 4 h. The CNTOH/MgCl2/TiCl4 catalyst showed a higher efficiency than that of the CNTL/MgCl2/TiCl4 catalyst, based on the rate of polymerization. The effects of the CNT-filler type on the isoprene polymerization behaviors and polymer properties were investigated. The morphologies of the trans-1,4-polyisoprene (TPI)/CNT and TPI/CNTOH nanocomposites exhibited a tube-like shape, and the CNTL and CNTOH fillers were well dispersed in the TPI matrix. In addition, the thermal stability of TPI significantly increased upon the introduction of a small amount of both CNTL/CNTOH fillers (0.15 wt%), owing to the satisfactory dispersion of the CNTL/CNTOH in the TPI matrix.



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