Low-melting phthalonitrile thermosetting monomers with siloxane- and phosphate bridges

• Published in: European polymer journal Vol. 84; pp. 205 - 217
• Main Authors: Bulgakov, B.A., Babkin, A.V., Dzhevakov, P.B., Bogolyubov, A.A., Sulimov, A.V., Kepman, A.V., Kolyagin, Yu.G., Guseva, D.V., Rudyak, V.Yu, Chertovich, A.V.
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01.11.2016; Elsevier BV
• Subjects: Aggregates; Chemical synthesis; Computer simulation; Fiber reinforced plastics; Glass transition temperature; Glass-transition; Heat resistance; Infusion; Low-melting thermosets; Mathematical models; Mechanical properties; Melting; Molecular dynamic; Molecular dynamics; Monomers; Phosphates; Phthalonitrile; Polymers; Reinforced plastics; Glass-transition; Low-melting thermosets; Mechanical properties; Phthalonitrile; Heat-resistance; Molecular dynamic
• ISSN: 0014-3057; 1873-1945
• DOI: 10.1016/j.eurpolymj.2016.09.013

[Display omitted] •Low melting siloxane- and phosphate-bridged phthalonitrile monomers are reported.•Computational model aimed to predict monomers Tg is developed.•Cured resins demonstrate excellent thermal performance featured to phthalonitriles. The series of low-melting siloxane- and phosphate-bridged phthalonitriles are studied. The monomers of this type possess glass transition temperatures more than 100°C lower than for common phthalonitriles. Based on the collected experimental data molecular dynamics simulations aimed to predict glass-transition temperatures of the considered types of low-melting phthalonitriles are reported. The validity of computational model is confirmed by successful synthesis of the new monomers, e.g. phosphate- and phosphonate-bridged phthalonitriles are introduced for a first time. Cured Bis(3-(3,4-dicyanophenoxy)phenyl) phenyl phosphate demonstrates thermal performance featured to phthalonitriles (HDT∼450°C, T5%=524°C, Yc, (Ar)=80%) along with increased thermo-oxidative stability. In aggregate with convenient processing the considered phthalonitriles can be used as high-temperature matrices for fiber-reinforced plastics production by vacuum infusion or RTM techniques.