Polyolefins Journal
With the collaboration of Iran Polymer Society

Synthesis of cyclic olefin polymers with high glass transition temperature and high transparency using tungsten-based catalyst system

Document Type : Original research

Authors

Lei Cui 1
Ji-Xing Yang 2
Yan-Guo Li 1
Yue-Sheng Li 2

1 State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China

2 School of Material Science and Engineering, Tianjin University, Tianjin 300350, China

https://doi.org/10.22063/poj.2017.1476
Abstract
Novel cyclic olefin polymers (COPs) derived from bulky cyclic olefins, tricyclodipentadiene (TCPD) and tricyclo[6.4.0.19,12]-tridec-10-ene (TTE), with high glass transition temperature (Tg), excellent thermal stability, and high transparency, have been synthesized by ring-opening metathesis polymerization (ROMP) and subsequent hydrogenation. ROMP of TCPD and TTE was carried out successfully without gel formation using a WCl6/i-Bu3Al/Et-OH/hexene catalyst system at room temperature. By changing the TCPD/TTE molar ratio, the optimized catalyst component ratio for the polymerization varied. Chemical structures of the unsaturated and hydrogenated polymers were characterized by 1H NMR technique. Thermal properties of these newly synthesized polymers were determined using TGA and DSC measurements. The degradation temperatures (Td) were all above 420°C in N2, indicating that all these copolymers had excellent thermal stability. After hydrogenation, Tg of ROMP polymers was decreased by 30-60°C. The Tg of h-pTCPD reached as high as about 230°C. The light transmittances of these polymer films were also analyzed using UV-Vis absorption spectroscopy. A high light transmittance of up to 92% was found by UV-Vis absorption spectra for these polymer films.

Keywords

Ring-opening metathesis polymerization
cyclic olefin polymer
norbornene derivatives
tungsten
glass transition temperature
Subjects
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Polyolefins Journal
Volume 5, Issue 1
Winter 2018
Pages 15-22

  • Receive Date 19 May 2017
  • Revise Date 21 June 2017
  • Accept Date 02 July 2017
  • First Publish Date 01 January 2018

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