Number: 1999-039-1-400
Title: Structure and properties of cyclic olefin copolymers
Task Group
Chairman: Sung Chul
Kim
Members: D. Dijkstra,
Jiasong He, Dae
Woo Ihm, Bing-Zheng
Jiang, T. Kobotake,
Doo S. Lee, T.
Masuda, Georg. H. Michler,
T. Takigawa,
and Sang Sun Woo
Completion Date: 2006 - project completed
Objective:
To evaluate the structure-property correlations between the chemical
structure and the rheological and physical properties of the cyclic
olefin copolymers.
Description:
The modification of the general purpose polyolefin materials to
enhance the performance characteristics to the level of engineering
plastics is currently a hot topic of industrial as well as academic
research. The copolymerization of ethylene with cyclic olefin monomers
produces high Tg, optically clear, low shrinkage, low moisture absorption,
and low birefringence materials. They are currently being produced by
Mitsui Petrochemical, Hoechst Celanese, Japan Synthetic Rubber, and
Nippon Zeon Co. and are applied as packaging materials, plastic lenz
and new substrate for the compact disk and other optical storage media.
The processing of cyclic olefin copolymers is rather difficult and the
relation between the rheological properties and the chemical structure
should be well established. The incorporation of polar monomers such
as acrylates during the copolymerization is sometimes employed to improve
the adhesion properties. The surface characteristics with the inclusion
of the polar monomers is also an area to be analyzed. The aim of this
research is to evaluate structure-property relations of the recently
commercialized cyclic olefin copolymers by the structure analysis, rheological
measurement, surface characterization and property estimation.
Progress:
The experimental works have been completed, and the following outcomes
published/ prepared for publication:
"Thermal Degradation Studies On Cyclic Olefin Copolymers",
C. Liu, J. Yu, X. Sun, J. Zhang, J. He, J. Polymer Degradation and
Stability, 81, 197-205 (2003) [full
text - pdf 310 kB]
"Chemical Structure and Physical Properties of Cyclic Olefin Copolymers",
J. Y. Shin, J. Y. Park, C. Liu, J. He, S. C. Kim, Pure
Appl. Chem.
77(5), 801-814, 2005
"Dynamic Birefringence of Cyclic Olefin Polymers", O. G.
Kyo and T. Inoue, Rheologica Acta, in press.
"Dependence of zero-shear viscosity and steady-state compliance
on molecular weight between entanglements for ethylene-cycloolefin copolymers",
T. Takigawa, H. Kadoya, T. Miki, T. Yamamoto, T. Masuda, submitted
"Rheological Properties of Cyclic Olefin Copolymers" T, Takigawa,
D. J. Djikstra, and J. He, in preparation
"Mechanical and Dynamic Mechanical Properties of Cyclic Olefin
Copolymers", K. Nitta and K. Nakayama, in preparation
Morphology and Micromechanical Behavior of Ethylene Cycloolefin
Copolymers, V. Seydewitz, M.Krumova, G. H. Michler, J. Y. Park,
S. C. Kim, Polymer, 46, 5608-5614 (2005)
doi:10.1016/j.polymer.2005.05.029
Last update: 28 July 2005
<project announcement published in
Chem.
Int.
22(5) 2000>