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Macromolecular Research

, Volume 14, Issue 4, pp 424–429 | Cite as

Synthesis of norbornene block copolymers containing polyhedral oligomeric silsesquioxane by sequential ring-opening metathesis polymerization

  • Younghwan Kwon
  • Kyung-Hoe Kim
Article

Abstract

The synthesis of a series of poly(POSS-NBE-b-MTD) copolymers was successfully accomplished, taking advantage of sequential, ring-opening, metathesis block copolymerization using RuCl2(=CHPh)(PCy3)2 catalyst. By using cyclopentyl-POSS-norbornene (POSS-NBE) monomer as the first block in the block copolymer, living poly(POSS-NBE) with controlled molecular weight and narrow molecular weight distribution was produced. Then, poly(POSS-NBE-b-MTD) copolymers were successfully prepared, in which sequential monomer addition of methyltetracyclododecene (MTD) to the living poly(POSS-NBE) chain ends was utilized to achieve quantitative crossover efficiency. Characterization by1H NMR spectroscopy and GPC confirmed the high definition and structural integrity of the poly(POSS-NBE-b-MTD) copolymers. Thermal properties and morphologies of the POSS-containing block copolymer nanocomposites were also investigated by using thermogravimetric analysis (TGA), transmission electron microscopy (TEM), and wide-angle X-ray scattering (WAXS).

Keywords

polyhedral oligomeric silsesquioxane nanocomposite ring-opening metathesis polymerization block copolymer sequential monomer addition 

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Copyright information

© The Polymer Society of Korea and Springer 2006

Authors and Affiliations

  • Younghwan Kwon
    • 1
  • Kyung-Hoe Kim
    • 1
  1. 1.Department of Chemical EngineeringDaegu UniversityGyeongsanKorea

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