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- W2000605438 abstract "Novel cyclic olefin polymers (COPs) with excellent transparency and high glass-transition temperature (Tg) synthesized from bulky norbornene derivative, exo-1,4,4a,9,9a,10-hexahydro-9,10(1',2')-benzeno-l,4-methanoanthracene (HBMN), and cis-cyclooctene (COE) by ring-opening metathesis copolymerization utilizing the “first-generation Grubbs” catalyst, RuCl2(PCy3)2(CHPh), and subsequent hydrogenation was reported herein. To get amorphous copolymers, it was of great importance to control the feed ratios and the polymerization time for gradient copolymerization. All these copolymers showed very high Tgs (141.1–201.2 °C), which varied with the content of HBMN. The films of the gradient copolymers with only one Tg were highly transparent. On the contrary, all the block copolymers synthesized through sequential addition showed two thermal transition temperatures, Tg and melt temperature (Tm), and the films of these block copolymers were opaque. The mechanical performances of the COPs were also investigated. It is the first report that transparent COP could be prepared from bulky norbornene derivative and monocyclic olefin. © 2014 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2014, 52, 3240–3249" @default.
- W2000605438 created "2016-06-24" @default.
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- W2000605438 date "2014-09-13" @default.
- W2000605438 modified "2023-10-10" @default.
- W2000605438 title "Synthesis of novel cyclic olefin polymers with excellent transparency and high glass-transition temperature via gradient copolymerization of bulky cyclic olefin and<i>cis</i>-cyclooctene" @default.
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- W2000605438 doi "https://doi.org/10.1002/pola.27386" @default.
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