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Citation: Iwhan CHO, Kwang-Soo PYUN. Vinylic polymerization of Norbornenecarboxylic Acid Esters by Palladium Complexes[J]. Chinese Journal of Applied Chemistry, ;2001, 18(5): 296-300. shu

Vinylic polymerization of Norbornenecarboxylic Acid Esters by Palladium Complexes

1.
Department of Chemistry and Interdisciplinary Program in Polymerics, Korea Advanced Institute of Science and Technology P.O.Box 201 Chongrang, Dongdaemoongu, Seoul, 130-650 Korea

Received Date: 10 January 2001
Available Online: 21 February 2001

New thermoplastic norbornene polymers containing ester groups were prepared by vinylic polymerization of norbornene-carboxylic acid esters by Pd(Ⅱ)-based catalysts. The monomers were obtained by Diels-Alder reaction of cyclopentadiene with acrylic acid esters (methyl and butyl) as mixtures of endo/exo (ratio 40/60)-isomers and were converted to polymers in 60%~70% conversion. The endo-isomer was less reactive than the exo-isomer. To obtain higher molecular weight the more reactive pure exo-isomer was prepared and polymerized with the Pd(Ⅱ)-catalysts, tetrakis(acetonitrile) Pd(Ⅱ) bis(tetrafluoroborate) and (Z³-allyl) Pd(Ⅱ)SbF₆, in high conversion. These polymers showed high glass transition temperatures, high transparency and good solubility in common solvents.
- palladium catalyst,
- norbornene carboxylic acid ester,
- norbornene polymer
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