Journal
EUROPEAN POLYMER JOURNAL
Volume 84, Issue -, Pages 205-217Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.eurpolymj.2016.09.013
Keywords
Phthalonitrile; Heat-resistance; Low-melting thermosets; Molecular dynamic; Glass-transition; Mechanical properties
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Funding
- Government of the Russian Federation Ministry of Education and Science [14.576.21.0039 (RFMEF157614X039)]
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The series of low-melting siloxane- and phosphate-bridged phthalonitriles are studied. The monomers of this type possess glass transition temperatures more than 100 degrees 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 similar to 450 degrees C, T-5% = 524 degrees C, Y-c, (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. (C) 2016 Elsevier Ltd. All rights reserved.
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