Synthesis and properties of new thermosetting oligoimides containing terminal propargyl groups

Авторы: Bochenkov V.S., Ryzhkov A.I., Shamsutdinova R.N., Piskarev M.S., Baklagin V.L., Tsegelskaya A.Yu, Abramov I.G., Buzin A.I., Kuznetsov A.A.
Журнал: Russian Chemical Bulletin
Том: 73
Номер: 9
Год издания: 2024
Издательство: Springer Nature
Местоположение издательства: Switzerland
Первая страница: 2730
Последняя страница: 2739
DOI: 10.1007/s11172-024-4386-4
Аннотация: A series of new oligoimides based on 4,4- and 3,4-oxydianiline and 2,2-bis[(3,4-dicarboxyphenoxy)phenyl]propane dianhydride, possessing different average chain lengths, and containing terminal propargyl groups were synthesized according to an efficient single-step high-temperature polycyclocondensation method. Their molecular weight characteristics, solubility in organic solvents, thermal (DSC, TMA, and TGA), and rheological properties were studied. The synthesized oligoimides exhibited a significantly lower exothermic effect upon curing due to their elongated chain as compared to diimides. The oligoimides upon increasing the temperature enter into a viscous fluid state, in which they remain up to the curing onset temperature of 270–320 °C. The symmetry of structure of the diamine moiety (4,4-ODA or 3,4-ODA) and the molecular weight of oligoimides affect the temperature of transition to the viscous fluid state.
Добавил в систему: Боченков Владимир Сергеевич

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