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Immobilization of Homogeneous Catalyst on Functionalized Carbon Nanotube via 1,3-Dipolar Cycloaddition Reaction and its Ethylene Polymerization
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  • Journal title : Korean Chemical Engineering Research
  • Volume 54, Issue 4,  2016, pp.574-581
  • Publisher : The Korean Institute of Chemical Engineers
  • DOI : 10.9713/kcer.2016.54.4.574
 Title & Authors
Immobilization of Homogeneous Catalyst on Functionalized Carbon Nanotube via 1,3-Dipolar Cycloaddition Reaction and its Ethylene Polymerization
Lee, Jeong Suk; Lee, Se Young; Lee, Jin Woo; Ko, Young Soo;
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In this study, CNT functionalized with pyrrolidine ring via 1,3-dipolar cycloaddition reaction with various amino acid and aldehyde was synthesized. Metallocene was subsequently immobilized on the functionalized CNT and CNT/polyethylene composite was prepared via in-situ ethylene polymerization. The polymerization activities of metallocene supported on CNT functionalized with glycine and benzaldehyde (Gly+BA-CNT) were similar to those of metallocene supported on CNT functionalized with N-benzyloxycarbonylglycine and paraformaldehyde (Z-Gly+PFA-CNT) although its Zr content was lower than that of Z-Gly+PFA-CNT. In the case of metallocene supported on Z-Gly+PFA-CNT, the even distribution of active sites hindered the diffusion of ethylene monomer and cocatalyst MAO due to steric hindrance during ethylene polymerization. Compared to polyethylene produced from homogeneous metallocene catalysts, CNT/PE composites had a higher initial degradation temperature () and maximum mass loss temperature (). It suggests that pyrrolidine functionalized CNT is uniformly dispersed and strongly interacted with the PE matrix, enhancing the thermal stability of PE.
Multi-walled carbon nanotube;1,3-Dipolar cycloaddition;Surface functionalization;Metallocene;Ethylene polymerization;
 Cited by
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