The robustness of a thermoset of a main-chain type polybenzoxazine precursor prepared through a strategy of A–A and B–B polycondensation

RSC Advances ◽  
2016 ◽  
Vol 6 (22) ◽  
pp. 18678-18684 ◽  
Author(s):  
Meng Wei Wang ◽  
Ru Jong Jeng ◽  
Ching Hsuan Lin
Keyword(s):  
Molecular Weight ◽  
Dielectric Properties ◽  
Main Chain ◽  
Mannich Condensation ◽  
Chain Type

A polybenzoxazine precursor was prepared via an A–A and B–B condensation, with a much higher molecular weight than those prepared by Mannich condensation. After curing, the thermoset shows robustness in thermal, mechanical, and dielectric properties.

scholarly journals Low-Dissipation Thermosets Derived from Oligo(2,6-dimethyl phenylene oxide)-containing Benzoxazines

2018 ◽  
Author(s):  
Chien-Han Chen ◽  
Kuan-Wei Lee ◽  
Ching-Hsuan Lin ◽  
Tzong-Yuan Juang
Keyword(s):  
Dielectric Properties ◽  
Nucleophilic Substitution ◽  
Catalytic Hydrogenation ◽  
High Frequency ◽  
Main Chain ◽  
Dissipation Factor ◽  
Insulating Materials ◽  
Phenylene Oxide ◽  
Low Dissipation ◽  
Chain Type

Poly(2,6-dimethyl phenyl oxide) (PPO) is known for its low dissipation factor. To achieve insulating materials with low dissipation factor for high-frequency communication application, a monomer-type benzoxazine (P-APPO) and a main-chain-type benzoxazine (BPA-APPO) were prepared from an amine end-capped oligo (2,6-dimethyl phenylene oxide) (APPO). The APPO was prepared from a nucleophilic substitution of a phenol-end capped oligo (2,6-dimethyl phenylene oxide) (a commercial product, SA 90) with fluoronitrobenzene, and followed by catalytic hydrogenation. After self-curing or curing with a dicyclopentadiene-phenol epoxy (HP 7200), thermosets with high-Tg and low-dissipation factor can be achieved. Furthermore, the resulting epoxy thermosets show better thermal and dielectric properties than those of epoxy thermoset cured from its precursor SA90, demonstrating it is a successful modification in simultaneously enhancing the thermal and dielectric properties.

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

A facile method for the preparation of aliphatic main-chain benzoxazine copolymers with high-frequency low dielectric constants

2018 ◽  
Vol 9 (21) ◽  
pp. 2913-2925 ◽  
Author(s):  
Ming Zeng ◽  
Jiangbing Chen ◽  
Qingyu Xu ◽  
Yiwan Huang ◽  
Zijian Feng ◽  
...  
Keyword(s):  
Dielectric Properties ◽  
High Frequency ◽  
Main Chain ◽  
Polymerization Kinetics ◽  
Dielectric Constants ◽  
Low Dielectric

The effects of the reaction solvent on the preparation, polymerization kinetics, and high-frequency dielectric properties of aliphatic main-chain benzoxazine copolymers were investigated.

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).

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