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Principles of Polymer Optical Fibers
Published in Marcelo Martins Werneck, Regina Célia da Silva Barros Allil, Plastic Optical Fiber Sensors, 2019
Ricardo Oliveira, Lúcia Bilro, Rogério N. Nogueira
COPs are amorphous polyolefins with a cyclic structure in the main chain. The polymerization is done through ring opening metathesis polymerization (ROMP) of norbornene derivatives followed by hydrogenation of double bonds (see Figure 2.11), providing more stability in terms of heat and weather resistance (Cui et al., 2015; Obuchi et al., 2015). The commercialization of COPs was initialized in 1991 by Zeon Corporation (Obuchi et al., 2015). Today it is sold under the trade names of ZEONEX® and ZEONOR® by Zeon, and ARTON® by Japan Synthetic Rubber (JSR) (Minami, 2010).
Principles
Published in Ricardo Oliveira, Lúcia Bilro, Rogério Nogueira, Polymer Optical Fiber Bragg Gratings, 2019
Ricardo Oliveira, Lúcia Bilro, Rogério Nogueira
In COPs, the polymerization is made through Ring Opening Metathesis Polymerization (ROMP) of norbornene derivatives followed by hydrogenation of double bonds, conferring more stability in terms of heat and weather resistance [54,55]. COPs are sold with trade names of ZEONEX® and ZEONOR® by Zeon, and ARTON® by Japan Synthetic Rubber [32].
Synthesis and characterization of N4-donor Schiff base copper(II) immobilized on superparamagnetic Fe3O4@SiO2 and its use as a recyclable catalyst for oxidation of alkenes, alcohols, and determination of antibacterial activity
Published in Inorganic and Nano-Metal Chemistry, 2023
Somayeh Panahandehjo, Maryam Lashanizadegan, Khosro Mohammadi, Fatemeh Yazdian
The oxidation products of styrene are styrene epoxide and benzaldehyde. First, styrene epoxide formed and then, due to the opening of the epoxide ring following the failure of the carbon-carbon bond, benzaldehyde compound formed (Scheme 2a).[51] The only product of norbornene oxidation was norbornene epoxide, indicating that only the double bond underwent oxidation (Scheme 2b). In the cyclohexane, allylic oxidation occurred due to the half-seat conformation in which the allylic hydrogen was in a good position to oxidize (Scheme 2c).[52]
The dependence of rubber tackiness on separation speed
Published in The Journal of Adhesion, 2023
The EPDM rubber was purchased from Jilin Petrochemical Company under the trade name EPDM-4045. This polymer contains 53.4% randomized ethylene, 38.9% propylene and 7.7% ethylidene norbornene (ENB) monomers according to the manufacture’s report. The Mooney viscosity of this polymer is 47 at 100°C. The glass transition temperature of this polymer is −51°C. The molecular weight Mw of this EPDM is 132 kg/mol and the polydispersity Mw/Mn of this polymer is 1.87.