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Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Применить Всего найдено 2. Отображено 2.
05-05-2023 дата публикации

Composite material external grid rib bearing cylinder, forming mold and preparation method

Номер: CN116062188A
Автор: ZOU ZHIWEI, CHI HE, CAO YANJUN, QIN CHUANG, WANG HONGYU, YUE QIANG, MENG FANYI, LI ZHICHAO, FENG CHANGQING
Принадлежит:

The invention provides a composite material external grid rib bearing cylinder, a forming die and a preparation method, the bearing cylinder is integrally manufactured by adopting a metal forming die through extrusion die assembly, fiber and resin prepregs are laid according to a set laying angle, and the bearing cylinder is integrally prepared mainly through pre-extrusion forming and extrusion die assembly during preparation. According to the composite material external grid rib bearing cylinder, the problems that the mode that the cylinder and the L-shaped ribs are spliced into a whole after the cylinder is formed or a traditional metal structure is complex in working procedure, the defects that the mechanical property of the splicing position is weak, and a glue joint face is prone to layering cannot occur are solved, and the composite material external grid rib bearing cylinder has better mechanical property and is lighter in weight; and the structural stability is better, and the performance ...

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Номер записи: 1
23-06-2023 дата публикации

Degradable polyamide polymer as well as preparation method and application thereof

Номер: CN116284755A
Автор: LUO LIANG, YUE QIANG
Принадлежит:

The invention relates to a degradable polyamide polymer as well as a preparation method and application thereof, and relates to the field of degradable polymers. The invention relates to a conjugated dialkynyl polyamide high-molecular polymer, which is prepared by condensing monomer conjugated dialkynyl binary acyl chloride and diamine. The conjugated dialkynyl polyamide has good processability of a polymer material, and can be prepared into a plastic film through a tape casting method and prepared into filaments through dry spinning. The prepared plastic film and filament not only show excellent mechanical properties, but also can be completely photo-oxidized and degraded into small molecular organic acids and organic amines by sunlight under natural environment conditions. According to the invention, the defects of poor mechanical property, low natural degradation rate, incomplete natural degradation and high recycling cost of degradable materials are overcome, the method has wide application ...

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Номер записи: 2