Main-chain type benzoxazine polymers consisting of polypropylene glycol and phenyleneethynylene units: spacer effect on curing behavior and thermomechanical properties

2021 ◽  
Author(s):  
Takumi Kobayashi ◽  
Masanobu Muraoka ◽  
Masahide Goto ◽  
Masaki Minami ◽  
Hiromitsu Sogawa ◽  
...  
Keyword(s):  
Main Chain ◽  
Thermomechanical Properties ◽  
Polypropylene Glycol ◽  
Curing Behavior ◽  
Chain Type

Main-Chain-Type 8-Quinolinol Polymers:  Synthesis, Optical Properties, and Complex Formation with Metals

2008 ◽  
Vol 41 (5) ◽  
pp. 1654-1662 ◽  
Author(s):  
Takayuki Iijima ◽  
Shin-ichi Kuroda ◽  
Takakazu Yamamoto
Keyword(s):  
Optical Properties ◽  
Complex Formation ◽  
Main Chain ◽  
Chain Type

Crosslinked main-chain-type polybenzoxazine coatings for corrosion protection of mild steel

2017 ◽  
Vol 14 (4) ◽  
pp. 937-944 ◽  
Author(s):  
Xin Lu ◽  
Yan Liu ◽  
Wenfei Zhang ◽  
Xueying Zhang ◽  
Changlu Zhou ◽  
...  
Keyword(s):  
Mild Steel ◽  
Corrosion Protection ◽  
Main Chain ◽  
Chain Type

Facile photochemical synthesis of main-chain-type semifluorinated alternating copolymers catalyzed by conventional amines or halide salts

2021 ◽  
Author(s):  
Yuxue Wang ◽  
Kai Tu ◽  
Jiannan Cheng ◽  
Enjie He ◽  
Jinying Wang ◽  
...  
Keyword(s):  
Main Chain ◽  
Halogen Bond ◽  
Low Cost ◽  
Photochemical Synthesis ◽  
Alternating Copolymers ◽  
Halide Salts ◽  
Chain Type

In this work, we report a much simple and low-cost method to prepare main-chain-type semifluorinated alternating copolymers by the formation of halogen bond (XB) complex between α,ω-diiodoperfluoroalkanes and amines/halide salts....

Outstanding dielectric and thermal properties of main chain-type poly(benzoxazine-co-imide-co-siloxane)-based cross-linked networks

2019 ◽  
Vol 10 (19) ◽  
pp. 2387-2396 ◽  
Author(s):  
Kan Zhang ◽  
Xinye Yu ◽  
Shiao-Wei Kuo
Keyword(s):  
Dielectric Constant ◽  
Thermal Properties ◽  
High Performance ◽  
Main Chain ◽  
Low Dielectric Constant ◽  
Low Dielectric ◽  
Chain Type ◽  
Dielectric And Thermal Properties

A high performance cross-linked polymer with a very low dielectric constant was achieved via a newly designed main-chain type poly(benzoxazine-co-imide-co-siloxane).

scholarly journals Synthesis of Polyazobenzenes Exhibiting Photoisomerization and Liquid Crystallinity

Polymers ◽  
2019 ◽  
Vol 11 (2) ◽  
pp. 348 ◽  
Author(s):  
Masashi Otaki ◽  
Reiji Kumai ◽  
Hajime Sagayama ◽  
Hiromasa Goto
Keyword(s):  
Conjugated Polymers ◽  
Main Chain ◽  
Cross Coupling ◽  
Industrial Applications ◽  
Optical Absorption Spectroscopy ◽  
X Ray Diffraction ◽  
Liquid Crystallinity ◽  
X Ray ◽  
Cis And Trans ◽  
Chain Type

While only a few studies have investigated the synthesis of main chain-type polyazobenzenes, they continue to draw an increasing amount of attention owing to their industrial applications in holography, dyes, and functional adhesives. In this study, dibromoazobenzene was prepared as a monomer for constructing azo-based π-conjugated polymers. Miyaura–Suzuki cross-coupling polymerization was conducted to develop copolymers containing an azobenzene unit as a photoisomerization block and a pyrimidine-based liquid crystal generator block. The prepared polymers exhibited thermotropic liquid crystallinity and underwent cis and trans photoisomerization upon irradiation with ultraviolet and visible light. Furthermore, the photoisomerization behavior was examined using optical absorption spectroscopy and synchrotron X-ray diffraction spectrometry.

scholarly journals Photomechanic Behavior of Main-chain Type of Polycoumarates

2013 ◽  
Vol 26 (2) ◽  
pp. 271-275
Author(s):  
Kagsuaki Yazaki ◽  
Seiji Tateyama ◽  
Daisake Kaneko ◽  
Tetsuo Kaneko
Keyword(s):  
Main Chain ◽  
Chain Type

An acid/base switchable and reversibly cross-linkable polyrotaxane

2014 ◽  
Vol 5 (13) ◽  
pp. 3994-4001 ◽  
Author(s):  
Shijun Li ◽  
Guan-Huan Weng ◽  
Wei Lin ◽  
Zhi-Bin Sun ◽  
Mi Zhou ◽  
...  
Keyword(s):  
Main Chain ◽  
Acid Base ◽  
Recognition Motif ◽  
Chain Type

A main chain-type polyrotaxane was fabricated based on the DP24C8/dialkylammonium recognition motif, in which the host could be controllably shuttled on the axle of the polyrotaxane upon acid–base stimuli and reversibly cross-linked via Pd coordination and decoordination.

Thermomechanical properties of monodomain nematic main-chain liquid crystal elastomers

Soft Matter ◽  
2018 ◽  
Vol 14 (29) ◽  
pp. 6024-6036 ◽  
Author(s):  
Daniel R. Merkel ◽  
Nicholas A. Traugutt ◽  
Rayshan Visvanathan ◽  
Christopher M. Yakacki ◽  
Carl P. Frick
Keyword(s):  
Liquid Crystal ◽  
Main Chain ◽  
Reaction Scheme ◽  
Thermomechanical Properties ◽  
Two Stage ◽  
Liquid Crystal Elastomers

Actuation temperature was controlled without influencing total actuation performance in liquid crystal elastomers fabricated by a two-stage reaction scheme.

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