Development of half-titanocene catalysts for synthesis of cyclic olefin copolymers

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Nomura Kotohiro

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Journal Paper

Paper Information

Journal: POLYOLEFINS JOURNALS Year:621 | Volume: | Issue: Page(s): 59-70

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Information Journal Paper

Title

Development of half-titanocene catalysts for synthesis of cyclic olefin copolymers

Author(s)

Nomura Kotohiro | Issue Writer Certificate

Keywords

Cyclic olefin copolymersQ4

titanium catalystQ4

half-titanoceneQ4

norborneneQ4

cyclic olefinQ4

Abstract

Certain Cyclic olefin copolymers (COCs) are known as promising amorphous materials with high transparency in the UV-vis region, thermal and humidity resistance, low dielectric constant, low water absorption, and dimensional stability. This short review focuses on the synthesis of (new) Cyclic olefin copolymers by designed (nonbridged) half-titanocene catalysts, which enabled to proceed synthesis of the amorphous polymers by ethylene/ propylene copolymerization not only with norbornene (NBE), and tetracyclododecene (TCD), but also with so called low strained cyclic olefins (cyclopentene, cyclohexene, cycloheptene, and cyclooctene). Their thermal properties (glass transition temperature, Tg values) are affected by structure of the cyclic olefin employed and the contents, whereas linear relationships between Tg values and the contents were observed in all cases.

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