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Title

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

Year: 1396
COI: JR_POJ-5-1_002
Language: EnglishView: 249
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Authors

lei cui - State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun ۱۳۰۰۲۲, China
ji-xing yang - School of Material Science and Engineering, Tianjin University, Tianjin ۳۰۰۳۵۰, China
yan-guo li - State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun ۱۳۰۰۲۲, China
yue-sheng li - School of Material Science and Engineering, Tianjin University, Tianjin ۳۰۰۳۵۰, China

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 thermalstability, 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. Polyolefins J (2018) 5: 15-22

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This Paper COI Code is JR_POJ-5-1_002. Also You can use the following address to link to this article. This link is permanent and is used as an article registration confirmation in the Civilica reference:

https://civilica.com/doc/722750/

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cui, lei and yang, ji-xing and li, yan-guo and li, yue-sheng,1396,Synthesis of cyclic olefin polymers with high glass transition temperature and high transparency using tungsten-based catalyst system,https://civilica.com/doc/722750

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