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Pure Appl. Chem., 2005, Vol. 77, No. 5, pp. 801-814


Chemical structure and physical properties of cyclic olefin copolymers (IUPAC Technical Report)

Ju Young Shin1, Ji Yong Park1, Chenyang Liu2, Jiasong He2 and Sung Chul Kim1*

1 Korea Advanced Institute of Science and Technology, Department of Chemical and Biomolecular Engineering, Guseongdong, Yuseong-gu, Daejon 305-701, Korea
2 State Key Laboratory of Engineering Plastics, Center for Molecular Science, Institute of Chemistry, The Chinese Academy of Sciences, Beijing 100080, China

Abstract: Cyclic olefin copolymers comprise a new class of polymeric materials showing properties of high glass-transition temperature, optical clarity, low shrinkage, low moisture absorption, and low birefringence. There are several types of cyclic olefin copolymers based on different types of cyclic monomers and polymerization methods. In this work, we have analyzed the chemical structure of the currently commercialized cyclic olefin copolymers by 13C NMR, and investigated their glass-transition temperatures and surface characteristics. It was observed that the glass-transition temperature, Tg, of cyclic olefin copolymers depended on the bulkiness of the main chain, and the number of rings had an important role in increasing the bulkiness of cyclic olefin copolymers. Cyclic olefin copolymers with polar substituents such as ester or ether groups showed high surface energy per area and peel strength.