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Polymers 2015, 7(8), 1389-1409; doi:10.3390/polym7081389

Synthesis of High Performance Cyclic Olefin Polymers (COPs) with Ester Group via Ring-Opening Metathesis Polymerization

1
School of Material Science and Engineering, Tianjin University, Tianjin 300072, China
2
Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
*
Authors to whom correspondence should be addressed.
Academic Editor: Changle Chen
Received: 7 June 2015 / Revised: 4 July 2015 / Accepted: 8 July 2015 / Published: 4 August 2015
(This article belongs to the Special Issue Metal-Mediated Polymer Synthesis)
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Abstract

Novel ester group functionalized cyclic olefin polymers (COPs) with high glass transition temperature, high transparency, good mechanical performance and excellent film forming ability have been achieved in this work via efficient ring-opening metathesis copolymerization of exo-1,4,4a,9,9a,10-hexahydro-9,10(1′,2′)-benzeno-l,4-methanoanthracene (HBM) and comonomers (5-norbornene-2-yl methylacetate (NMA), 5-norbornene-2-yl methyl 2-ethylhexanoate (NME) or 5-norbornene-2-yl methyldodecanoate (NMD)) utilizing the Grubbs first generation catalyst, Ru(CHPh)(Cl)2(PCy3)2 (Cy = cyclohexyl, G1), followed by hydrogenation of double bonds in the main chain. The fully hydrogenated copolymers were characterized by nuclear magnetic resonance, FT-IR spectroscopy analysis, gel permeation chromatography, and thermo gravimetric analysis. Differential scanning calorimetry curves showed that the glass transition temperatures (Tg) linearly decreased with the increasing of comonomers content, which was easily controlled by changing feed ratios of HBM and comonomers. Static water contact angles tests indicate that hydrophilicity of copolymers can also be modulated by changing the comonomers incorporation. Additionally, the mechanical performances of copolymers were also investigated. View Full-Text
Keywords: ROMP (ring-opening metathesis polymerization); COPs (cyclic olefin polymers); dimensional stability; optical materials; hydrophilicity ROMP (ring-opening metathesis polymerization); COPs (cyclic olefin polymers); dimensional stability; optical materials; hydrophilicity
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Cui, J.; Yang, J.-X.; Li, Y.-G.; Li, Y.-S. Synthesis of High Performance Cyclic Olefin Polymers (COPs) with Ester Group via Ring-Opening Metathesis Polymerization. Polymers 2015, 7, 1389-1409.

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