Comparative study on tensile properties and microstructure development in elastomer-modified cyclic olefin copolymer

2014 ◽  
Vol 22 (3) ◽  
pp. 222-230 ◽  
Author(s):  
Seyed Hassan Jafari ◽  
Hossein Ali Khonakdar ◽  
Mohammad Tarameshlou ◽  
Mohammad Reza Saeb
Keyword(s):  
Comparative Study ◽  
Tensile Properties ◽  
Cyclic Olefin Copolymer ◽  
Microstructure Development ◽  
Cyclic Olefin

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

2017 ◽  
Vol 2017 ◽  
pp. 1-10 ◽  
Author(s):  
Mario H. Gutiérrez-Villarreal ◽  
Sara A. Zavala-Betancourt
Keyword(s):  
Thin Films ◽  
Comparative Study ◽  
Tensile Properties ◽  
Uv Light ◽  
Extrusion Process ◽  
Accelerated Weathering ◽  
Carbonyl Index ◽  
Cyclic Olefin ◽  
Cyclic Olefin Copolymers ◽  
Higher Sensitivity

A series of commercial cyclic olefin copolymers (COC), namely, ethylene-norbornene (E-NB) and ethylene-tetracyclododecene (E-TD), were processed as thin films with thicknesses of 25 μm by an extrusion process. The photodegradation of neat and formulated films with different metal stearates (Fe, Co, and Mn) was investigated using an ultraviolet (UV) light lamp (340 nm) for a period of 30 days in an accelerated weathering tester model QUV from Q-LAB according to the ASTM D 5208-01 standard practice. Changes in carbonyl index (CI) and tensile properties were used to evaluate the photodegradation of the films and other properties, such as Tg variation by DSC, were also analyzed. The present study reveals that (E-NB) copolymers show higher sensitivity to photodegradation than (E-TD) resins, in the absence and presence of metal stearates. We also find that the Fe salt shows the highest oxidative activity.

Effect of the number of arms on the mechanical properties of a star-shaped cyclic olefin copolymer

2019 ◽  
Vol 10 (41) ◽  
pp. 5578-5583 ◽  
Author(s):  
Takumitsu Kida ◽  
Ryo Tanaka ◽  
Koh-hei Nitta ◽  
Takeshi Shiono
Keyword(s):  
Mechanical Properties ◽  
Thermal Properties ◽  
Physical Properties ◽  
Secondary Amine ◽  
Aggregation Number ◽  
Drastic Change ◽  
Cyclic Olefin Copolymer ◽  
Cyclic Olefin

The increase of aggregation number in a star-shaped cyclic olefin copolymer was succeeded by using a triazine-based secondary amine, which caused a drastic change in physical properties without changing the thermal properties.

New Cyclic Olefin Copolymer for the Preparation of Thermally Responsive Luminescent Films

2009 ◽  
Vol 210 (9) ◽  
pp. 728-735 ◽  
Author(s):  
Filippo Donati ◽  
Andrea Pucci ◽  
Laura Boggioni ◽  
Incoronata Tritto ◽  
Giacomo Ruggeri
Keyword(s):  
Cyclic Olefin Copolymer ◽  
Cyclic Olefin ◽  
Thermally Responsive ◽  
Luminescent Films

scholarly journals Tuning the Surface Wettability of Cyclic Olefin Copolymer by Plasma Treatment and Graphene Oxide Deposition and Reduction

Polymers ◽  
2021 ◽  
Vol 13 (14) ◽  
pp. 2305
Author(s):  
Fadi Dawaymeh ◽  
Yawar Abbas ◽  
Maryam Khaleel ◽  
Anas Alazzam ◽  
Nahla Alamoodi
Keyword(s):  
Contact Angle ◽  
Plasma Treatment ◽  
Treatment Duration ◽  
Chemical Reduction ◽  
Surface Wettability ◽  
Oxygen Plasma Treatment ◽  
Microfluidic Channels ◽  
Cyclic Olefin Copolymer ◽  
Cyclic Olefin ◽  
Reduction Methods

Selective altering of surface wettability in microfluidic channels provides a suitable platform for a large range of processes, such as the phase separation of multiphase systems, synthesis of reaction controlled, nanoliter sized droplet reactors, and catalyst impregnation. Herein we study the feasibility to tune the wettability of a flexible cyclic olefin copolymer (COC). Two methods were considered for enhancing the surface hydrophilicity. The first is argon/oxygen plasma treatment, where the effect of treatment duration on water contact angle and COC surface morphology and chemistry were investigated, and the second is coating COC with GO dispersions of different concentrations. For enhancing the hydrophobicity of GO-coated COC surfaces, three reduction methods were considered: chemical reduction by Hydroiodic acid (HI), thermal reduction, and photo reduction by exposure of GO-coated COC to UV light. The results show that as the GO concentration and plasma treatment duration increased, a significant decrease in contact angle was observed, which confirmed the ability to enhance the wettability of the COC surface. The increase in hydrophilicity during plasma treatment was associated with the increase in surface roughness on the treated surfaces, while the increase during GO coating was associated with introducing oxygen-containing groups on the GO-coated COC surfaces. The results also show that the different reduction methods considered can increase the contact angle and improve the hydrophobicity of a GO-coated COC surface. It was found that the significant improvement in hydrophobicity was related to the reduction of oxygen-containing groups on the GO-coated COC modified surface.

Preparation and Characterization of PiezoelectricI Foams Based on Cyclic Olefin Copolymer

2021 ◽  
Author(s):  
Hui Wang ◽  
◽  
Yan Li ◽  
Xiaolin Wang ◽  
Zhe Liu ◽  
...  
Keyword(s):  
Cyclic Olefin Copolymer ◽  
Cyclic Olefin

Wettability modification of cyclic olefin copolymer surface and microchannel using micromilling process

2019 ◽  
Vol 37 ◽  
pp. 168-176 ◽  
Author(s):  
Myeong Gu Gang ◽  
Ki Woon Chae ◽  
Wook-Bae Kim ◽  
Young Hun Jung ◽  
Martin B.G. Jun ◽  
...  
Keyword(s):  
Cyclic Olefin Copolymer ◽  
Cyclic Olefin

Improving the electrical conductivity of ethylene 1-octene copolymer/cyclic olefin copolymer immiscible blends by interfacial localization of MWCNTs

2018 ◽  
Vol 59 (3) ◽  
pp. 447-456 ◽  
Author(s):  
Ali Hosseinpour ◽  
Rasool Nasseri ◽  
Sina Ghiassinejad ◽  
Milad Mehranpour ◽  
Ali Asghar Katbab ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Cyclic Olefin Copolymer ◽  
Cyclic Olefin ◽  
Immiscible Blends
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