Molecular design of interpenetrating fluorinated polyimide network with enhanced high performance for heat-resistant matrix

Molecular design of interpenetrating fluorinated polyimide network with enhanced high performance for heat-resistant matrix

Novel reactive phenylethynyl-endcapped diluents were synthesized and physically mixed with fluorinated cooligoimides (molecular weights of 5000 g/mol) derived from 4,4'-(hexafluoroisopropylidene)diphthalic anhydride (6FDA), 2,2′-bis(trifluoromethyl)-4,4′-diamino biphenyl (TFDB) and para-phenyle...

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Veröffentlicht in:Polymer (Guilford) 2019-05, Vol.173, p.66-79
Hauptverfasser: Zhou, Dianrui, Yuan, Lili, Hong, Weijie, Zhang, Haoyang, Hu, Aijun, Yang, Shiyong
Format: Artikel
Sprache:eng
Schlagworte:
Anhydrides
Biphenyl
Crosslinking
Diluents
Fluorination
Glass transition temperature
Interpenetrating polyimide network
Melt processability
Morphology
Organic chemistry
Phenylenediamine
Polymer blends
Polymer matrix composites
Reactive diluent
Recrystallization
Resins
Solvation
Transition temperatures
Transportation networks
Viscosity
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Zusammenfassung:Novel reactive phenylethynyl-endcapped diluents were synthesized and physically mixed with fluorinated cooligoimides (molecular weights of 5000 g/mol) derived from 4,4'-(hexafluoroisopropylidene)diphthalic anhydride (6FDA), 2,2′-bis(trifluoromethyl)-4,4′-diamino biphenyl (TFDB) and para-phenylenediamine (p-PDA) at 25/75 M ratio, and 4-phenylethyethynylphthalic anhydride (PEPA) to formulate blends served as matrix resins for developing high-performance composites with excellent processabilities. The uncured blend shows very low minimum melt viscosity (
ISSN:0032-3861
1873-2291
DOI:10.1016/j.polymer.2019.04.034