cycloolefin

[¦sī·klō′ō·lə·fən]

(organic chemistry)

Mentioned in ?

References in periodicals archive ?

Polymers used in this study were high-density polyethylene (HDPE; HTA 002; ExxonMobil Chemical) and cycloolefin copolymer (COC; Topas 8007; Ticona Celanese, Germany).

Strong Synergistic Improvement of Mechanical Properties in HDPE/COC Blends with Fibrillar Morphology

The cycloolefin film samples were exposed to aging in a QUV accelerated weathering tester according to ASTM D 5208-01 for 30 days (720 hr) for photooxidative treatment.

On a previous work [20] we published the high thermal stability of these cycloolefin resins with a decomposition temperature above of 450[degrees]C.

A Comparative Study of the Photodegradation of Two Series of Cyclic Olefin Copolymers

Korhonen et al., "Modification of cycloolefin copolymer and poly(vinyl chloride) surfaces by superimposition of nano- and microstructures," Applied Surface Science, vol.

Surface Treatment on Physical Properties and Biocompatibility of Orthodontic Power Chains

Yamazaki reviewed well the industrialization and application development of cycloolefin polymers (27).

In this study, rheological behavior of cycloolefin (COC)/G and EG composites were investigated in detail.

Rheological behavior of cycloolefin copolymer/graphite composites

Available products--usually denoted as cycloolefin copolymers (COC)--have recently attracted much attention in the field of materials science [9-14].

An amorphous cycloolefin copolymer produced under the trade name Topas 8007 was a product of Ticona (Celanese, Germany), consisting of 30% of bicyclo[2.2.1]hept-2-ene (norbornene) units and 70% of ethylene units [6]: MFI (260[degrees]C, 2.16 kg) = 34.3 g/10 min; density: 1.014 g/[cm.sup.3]; [T.sub.g] = 81[degrees]C.

High-density polyethylene/cycloolefin copolymer blends. Part 1: phase structure, dynamic mechanical, tensile, and impact properties

Besides Exxon's and Dow's work in catalyst development, significant metallocene catalyst technology has been developed by Chisso, Exxon, and Hoechst for isotactic polypropylene (iPP); by Hoechst and Mitsui Petrochemical for cycloolefin copolymers; by Fina and Mitsui Toatsu for syndiotactic polypropylene (sPP); and by Dow and Idemitsu for syndiotactic polystyrene.

Dow and Idemitsu are sampling syndiotactic polystyrene to customers for specialty molding applications, and Mitsui Petrochemical and Hoechst are selling cycloolefin polymers into engineering thermoplastic applications, such as compact discs.

Metallocenes: the next step

Candidate resins include epoxies, acrylics, cycloolefins, polycarbonates, and polyimides.

Industry patents: the patent is a legal document giving the holder a license to capitalize on the invention without competition for a few years. In exchange, the holder teaches the basis of the invention

Cycloolefins have been successfully copolymerized with ethylene to produce novel copolymers.