Vinyl-Type Polymerization of Alkylester-Substituted Norbornenes Without Endo/Exo Separation

Titelangaben

Müller, Kerstin ; Jung, Youngsuk ; Yoon, Do Y. ; Agarwal, Seema ; Greiner, Andreas:
Vinyl-Type Polymerization of Alkylester-Substituted Norbornenes Without Endo/Exo Separation.
In: Macromolecular Chemistry and Physics. Bd. 211 (2010) Heft 14 . - S. 1595-1601.
ISSN 1521-3935
DOI: https://doi.org/10.1002/macp.200900647

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Abstract

The vinyl-type homo- and copolymerization of 9-norborn-5-en-2yl-nonane acid ethyl ester and 2-hexyl-5-norbornen was investigated. Both monomers were polymerized using di-mu-chlorobis(6-methoxybicyclo[2.2.1]hept-2-ene-endo-5 sigma,2 pi)palladium(II) and AgSbF(6) as catalysts. Poly(2-hexyl-5-norbornene) is soluble in common organic solvents and has a T(g) of 252 degrees C. Poly(9-norborn-5-en-2yl-nonane acid ethyl ester) shows swelling in solvents like THF, chlorobenzene or chloroform and has a T(g) of 136 degrees C. The solubility of the copolymers depends on the amount of 9-norborn-5-en-2yl-nonane acid ethyl ester. E-modulus measurements of copolymers with different amounts of ester showed an increase of flexibility when increasing the content of 9-norborn-5-en-2yl-nonane acid ethyl ester in the copolymer.