Cyclo-olefin polymers

P. Mela, A. van der Berg, Y. Fintschenko, E.B. Cummings, B.A. Simmons and B. J. Kirby, The zeta potential of cyclo-olefin polymer microchannels and its effects on insulative (electrodeless) dielectrophoresis particle trapping devices, Electrophoresis, 26 (2005) 1792-1799. 

Figure 6.1 (A) Cyclo-olefin polymer device fabrication (1) spin coating of photo-...

Integration of Parylene Electrospray Tips with Cyclo-Olefin Polymer-Based Microchips for ESI-MS... 

The integration of a single parylene electrospray tip with the cyclo-olefin polymer chip is illustrated in Figure 6.3B. First, a microfluidic channel (20 pm wide, 10 pm deep) was formed in one cyclo-olefin polymer substrate by the... 

The fabrication procedure for the parylene electro spray tip is relatively simple, but manual alignment of the parylene tip to the end of the microchannel is tedious and should be replaced by a structure with mechanical alignment features. Because the thermal parameters of parylene are different from those of the cyclo-olefin polymer substrate, good control of the thermal bonding conditions is required for proper sealing between two materials without collapsing of the microchannels. 

Figure 6.6 Experimental configuration for interfacing a cyclo-olefin polymer device to a TOF mass spectrometer. (From ref. 12.)...

The fabrication procedure for the two-tip device is basically the same as the single electrospray device. First, the two independent microchannels were hot embossed onto one cyclo-olefin polymer chip, and the two sample reservoir holes were drilled onto this cyclo-olefin chip at the end of the microchannels. Then, a gold electrode with a width of 500 pm was fabricated onto another cyclo-olefin chip. A hole for gold electrode access was drilled through the other... 

H. Mae, Dynamic tensile behavior and light transmittance of cyclo-olefine polymer/clay composites, Zairyo/Joumal of the Society of Materials Science, Japan 58 (11) (2009) 895-902. 

Rohrmann, J. Brekner, M.-J. Kueber, F. Osan, F. Weller, T. Process for preparing cyclo-olefin polymers. European Patent 0610843B1 (Ticona GmbH), May 19, 1999. 

Additionally, metallocene catalysts enable the design of catalysts for tailored polyolefins due to the intrinsic nature of the single site. Actually, new polymers which could never have been produced by conventional Ziegler-Natta catalysts, i.e., syndiotactic polypropylene, syndiotactic polystyrene, long chain branched polyolefins, cyclo-olefin polymer, and styrene copolymers, can be obtained by metallocene catalysts. This upcoming new S curve in the polyolefin development cycle means the evolution of new type of polyolefins. 

Here, we review (1) research activities in metallocene catalysts, (2) polymerization performances of metallocene catalysts and other single-site catalyst technologies, with examples for polyethylene (PE), cyclo-olefin copolymer (COC), polypropylene (PP), syndiotactic polystyrene (SPS), and cyclo-olefin polymers, and (3) the computational design of metallocene catalysts. 

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