Effect of glass transition temperature and saturation temperature on the solid-state microcellular foaming of cyclic olefin copolymer

2015 ◽  
Vol 132 (28) ◽  
pp. n/a-n/a ◽  
Author(s):  
Huimin Guo ◽  
Vipin Kumar
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Solid State ◽  
Saturation Temperature ◽  
Cyclic Olefin Copolymer ◽  
Cyclic Olefin ◽  
Microcellular Foaming

scholarly journals Characterization of activated cyclic olefin copolymer: effects of ethylene/norbornene content on the physiochemical properties

The Analyst ◽  
2016 ◽  
Vol 141 (24) ◽  
pp. 6521-6532 ◽  
Author(s):  
Colleen E. O'Neil ◽  
Scott Taylor ◽  
Kumuditha Ratnayake ◽  
Swathi Pullagurla ◽  
Varshni Singh ◽  
...  
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Physical Properties ◽  
Cyclic Olefin Copolymer ◽  
Physiochemical Properties ◽  
Cyclic Olefin

The ethylene/norbornene content within cyclic olefin copolymer (COC) is well known to affect the chemical and physical properties of the copolymer, such as the glass transition temperature (Tg) and transparency.

Chemical structure and physical properties of cyclic olefin copolymers (IUPAC Technical Report)

2005 ◽  
Vol 77 (5) ◽  
pp. 801-814 ◽  
Author(s):  
Ju Young Shin ◽  
Ji Yong Park ◽  
Chenyang Liu ◽  
Jiasong He ◽  
Sung Chul Kim
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Chemical Structure ◽  
Moisture Absorption ◽  
High Surface ◽  
Polymeric Materials ◽  
Surface Characteristics ◽  
Cyclic Olefin ◽  
Cyclic Olefin Copolymers

Cyclic olefin copolymers comprise a new class of polymeric materials showing properties of high glass-transition temperature, optical clarity, low shrinkage, low moisture absorption, and low birefringence. There are several types of cyclic olefin copolymers based on different types of cyclic monomers and polymerization methods. In this work, we have analyzed the chemical structure of the currently commercialized cyclic olefin copolymers by 13C NMR, and investigated their glass-transition temperatures and surface characteristics. It was observed that the glass-transition temperature, Tg, of cyclic olefin copolymers depended on the bulkiness of the main chain, and the number of rings had an important role in increasing the bulkiness of cyclic olefin copolymers. Cyclic olefin copolymers with polar substituents such as ester or ether groups showed high surface energy per area and peel strength.

Synthesis and Characterization of Novel Polyfluorene Derivatives

2013 ◽  
Vol 815 ◽  
pp. 443-447
Author(s):  
Li Di Zhou ◽  
Xiao Dan Hu ◽  
Shao Hong Wang ◽  
Zhao Xia Hou ◽  
Mei Han Wang
Keyword(s):  
Glass Transition ◽  
Thermal Properties ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Solid State ◽  
Coupling Reaction ◽  
Synthesis And Characterization ◽  
Sonogashira Coupling ◽  
Sonogashira Coupling Reaction

A novel series of copolymers containing fluorene units are synthesized by Sonogashira coupling reaction in mild condition. Benzene, naphthalene and anthracene are co-polymerized with ethynylfluorene, respectively. The structures are confirmed by NMR, Mass, Elemental analysis and GPC. The polymers have good thermal properties with glass-transition temperature of 90-155°C(Tg), and they have bandgaps from 2.21-2.77 eV. The results of photoluminescence in solid state show that introduction of huge chromophore could effectively suppress the formation of aggregates and excimers which typically cause red-shifted or new emission.

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