Влияние полиэтилентерефталата на механические свойства полиимидных пленок
Авторы
DOI:
https://doi.org/10.31489/2025N1/28-36Ключевые слова:
полиимид, полиэтилентерефталат, наполнитель, одноосное растяжение, ИК-спектроскопия, вискозиметрияАннотация
В данном исследовании анализируется влияние различных концентраций наполнителя из полиэтилентерефталата на прочность на разрыв и относительное удлинение при разрыве полиимидных пленок при одноосном растяжении с целью определения влияния наполнителя на механические характеристики и долговечность этих пленок под нагрузкой. Изучено механическое поведение полиимидных пленок и их однородных композитов с полиэтилентерефталатом при одноосном растяжении. Образцы подготовлены путем механического смешивания растворов полиимидного лака с полиэтилентерефталатом, выступающим в качестве армирующего наполнителя. Результаты показывают, что для всех типов образцов начальная механическая нагрузка вызывает резкое увеличение относительного удлинения примерно на 3%, что объясняется поворотом глобул и выстраиванием макромолекул матрицы в вытянутые цепи вдоль направления нагрузки. Аддитивная зависимость вязкости, наблюдаемая в исследовании, дополнительно подтверждает отсутствие химических связей между макромолекулами полиимида и полиэтилентерефталата, а также отсутствие конформационных изменений внутри композита.
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