The synthesis of cyclic olefin copolymers (COCs) by ethylene copolymerisations with cyclooctene, cycloheptene, and with tricyclo[6.2.1.0(2,7)]undeca-4-ene: the effects of cyclic monomer structures on thermal properties

2020 ◽  
Vol 11 (35) ◽  
pp. 5590-5600
Author(s):  
Hitoshi Harakawa ◽  
Masaki Okabe ◽  
Kotohiro Nomura

The synthesis of amorphous ethylene copolymers with cycloheptene, cis-cyclooctene, or tricyclo[6.2.1.0(2,7)]undeca-4-ene using half-titanocene catalysts and the effects of ring size and structure on the thermal properties have been demonstrated.

2019 ◽  
Vol 10 (41) ◽  
pp. 5578-5583 ◽  
Author(s):  
Takumitsu Kida ◽  
Ryo Tanaka ◽  
Koh-hei Nitta ◽  
Takeshi Shiono

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.


1993 ◽  
Vol 328 ◽  
Author(s):  
A. N. Aleshin ◽  
E. G. Guk ◽  
V. A. Marikhin ◽  
L. P. Myasnikova ◽  
D. G. Belov

ABSTRACTA new oxydative-resistant, fusible and processible ethylene/acetylene copolymer has been synthesized. The content of rigid (acetylene) and flexible (ethylene) fragments has been widely varied. The structure of the nascent powders and the films compressed at room temperature have been investigated by SEM and WAXS. DSC has been used for studying the thermal properties. DC conductivity of the iodine doped samples has been measured as a function of temperature. It is shown that the doping leads to arising conductivity in the samples even at 10 Mol % acetylene fragments in copolymer. The conductivity up to 10−3 S/cm is reached for the samples with acetylene fragment concentration about 20 Mol %. It is found that a charge carrier transport in investigated copolymers is caused by doped polyacetylene fragments and described by the hopping Mechanism.


2005 ◽  
Vol 45 (2) ◽  
pp. 116-123 ◽  
Author(s):  
Gwan Kyo Oh ◽  
Tadashi Inoue

Polymer ◽  
2018 ◽  
Vol 136 ◽  
pp. 109-113 ◽  
Author(s):  
Ryo Tanaka ◽  
Akane Sasaki ◽  
Takuma Takenaka ◽  
Yuushou Nakayama ◽  
Takeshi Shiono

2012 ◽  
Vol 126 (3) ◽  
pp. 1121-1128 ◽  
Author(s):  
Zhen-hua Chen ◽  
Changchun Zeng ◽  
Chuck Zhang ◽  
Ben Wang ◽  
Kun Cao ◽  
...  

2019 ◽  
Vol 97 ◽  
pp. 377-387
Author(s):  
Mélisande Bernard ◽  
Emile Jubeli ◽  
Joudi Bakar ◽  
Johanna Saunier ◽  
Najet Yagoubi

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