Easy processable tris-phthalonitrile based resins and carbon fabric reinforced composites fabricated by vacuum infusion

Easy processable tris-phthalonitrile based resins and carbon fabric reinforced composites fabricated by vacuum infusion

Easy-processable phthalonitrile resins were prepared from tris-phthalonitrile phosphate monomer TPP (tris(3-(3,4-dicyanophenoxy)phenyl)phosphate), bis-phthalonitrile RP (bis (3,4-dicyanophenoxy)benzene) and novel viscosity reducing comonomer CPN (4-(4-cyanophenoxy)benzene-1,2-dicarbonitrile). It was...

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Bibliographic Details
Published in:Materials today communications Vol. 33; p. 104738
Main Authors: Yakovlev, M.V., Kuchevskaia, M.E., Terekhov, V.E., Morozov, O.S., Babkin, A.V., Kepman, A.V., Avdeev, V.V., Bulgakov, B.A.
Format: Journal Article
Language:English
Published: Elsevier Ltd 01-12-2022
Subjects:
Carbon fiber composites
Composite fabrication
Curing study
High temperature curing
Phthalonitriles
Vacuum infusion
High temperature curing
Curing study
Carbon fiber composites
Phthalonitriles
Composite fabrication
Vacuum infusion
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Summary:Easy-processable phthalonitrile resins were prepared from tris-phthalonitrile phosphate monomer TPP (tris(3-(3,4-dicyanophenoxy)phenyl)phosphate), bis-phthalonitrile RP (bis (3,4-dicyanophenoxy)benzene) and novel viscosity reducing comonomer CPN (4-(4-cyanophenoxy)benzene-1,2-dicarbonitrile). It was shown that TPP is more resistant to hydrolysis than reported phosphate based phthalonitriles (k = 8.2·10−4 s−1 at 65 ℃ and pH 10). Two different type of curing agents: aromatic diamine DDS and 4-(4-aminophenoxy) phthalonitrile APN were used to study their effect on properties of the obtained resins and composites. Carbon fabric composites with APN-cured matrix fabricated by vacuum infusion demonstrated compression strength up to 633 MPa and 100% retention of ILSS after oxidative aging for 200 h at 300 ℃. Post-curing of the matrix at 375 ℃ resulted in growth of Tg but at the same time microcracking occurrence in the composite leading to decrease in mechanical properties and thermal aging sustainability. [Display omitted] •Phthalonitrile resins for VIMP processing were developed based on TPP.•Tris-phthalonitrile TPP is more resistant to hydrolysis than bis-phthalonitrile DPP.•APN as curing agent provides higher strength of the composites than DDS.•CFRP with PN-TPP-APN matrix retains mechanical properties after 200 h at 300 °С.
ISSN:2352-4928
2352-4928
DOI:10.1016/j.mtcomm.2022.104738