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Небесная энциклопедия

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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Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Применить Всего найдено 3. Отображено 3.
05-05-2023 дата публикации

Method for detecting activity-NCO distribution in HTPB-IPDI curing reaction process

Номер: CN116068115A
Автор: CHENG LIANCHAO, LEE KYUNG-SU, SHI ZHIQUAN, LIU JING, CHENG SIFAN, CHEN JIANFA, ZHANG XIUYAN, HONG YANG, WANG XIYAN, LU ZHENCHAO
Принадлежит:

The invention discloses an activity-NCO distribution detection method in a curing reaction process of an HTPB-IPDI block polyurethane propellant, which comprises the following steps: firstly, preparing an IPDI standard sample solution, an isocyanate-terminated HTPB standard sample solution and an isocyanate-terminated cross-linking agent standard sample solution; calculating a relative correction factor of the internal standard substance to an IPDI standard sample, a relative correction factor of the internal standard substance to an isocyanate-terminated HTPB standard sample and a relative correction factor of the internal standard substance to an isocyanate-terminated cross-linking agent sample according to a gel permeation chromatogram of the solution; and finally, according to the relative correction factor, obtaining the mass fraction of free IPDI in the HTPB-IPDI sample, the mass fraction of isocyanate-terminated HTPB and the mass fraction of-NCO in the isocyanate-terminated cross-linking ...

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Номер записи: 1
30-05-2023 дата публикации

Device and method for testing content of curing agent in composite solid propellant slurry

Номер: CN116183299A
Автор: LIU JING, WU JINGHUI, CHENG LIANCHAO, LEE KYUNG-SU, ZHANG DANYANG, SHI ZHIQUAN, HONG YANG, LU ZHENCHAO, CAO KAI
Принадлежит:

The invention provides a device and a method for testing the content of a curing agent in composite solid propellant slurry, and particularly relates to a sampling device for the composite solid propellant slurry, an adjustable pressure device of an infrared spectrometer and a method for testing the content of the curing agent in the composite solid propellant slurry. And the content of the curing agent in the propellant slurry with different curing degrees can be tested. The method has the advantages of being simple and convenient to operate, the sampling device and the pressure adjusting device have the advantages of being novel in design, easy to operate and the like, the accuracy of infrared spectroscopy testing can be improved, the accuracy of quantitative analysis data can be improved, and the method for testing the content of the composite solid propellant slurry curing agent is established. A novel method is provided for monitoring the change rule of the content of the curing agent ...

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Номер записи: 2
18-07-2023 дата публикации

Method for detecting gelation degree of small amount of propellant sample

Номер: CN116448897A
Автор: LEE KYUNG-SU, CHENG LIANCHAO, SHI ZHIQUAN, LIU JING, CHENG SIFAN, CHEN JIANFA, HONG YANG, LU ZHENCHAO, WANG XIYAN, CAO KAI
Принадлежит:

The invention provides a method for detecting the gelation degree of a small quantity of propellant samples, which comprises the following steps of: determining the components of propellant films according to the components of a propellant to be detected, and adjusting curing parameters or curing time to obtain a plurality of groups of propellant films with different gelation degrees; the method comprises the following steps: weighing propellant film samples with different gelation degrees, dissolving to a constant volume, carrying out chromatographic detection on a solution part, and drawing a sol standard curve; the method comprises the following steps: weighing a to-be-detected propellant sample, dissolving to a constant volume, taking a solution part, carrying out chromatographic detection, determining the sol mass in the propellant through a standard curve method, calculating the gel mass according to the formula that the network structure mass of the to-be-detected propellant is equal ...

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Номер записи: 3