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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 5. Отображено 5.
04-04-2023 дата публикации

Polypropylene composition as well as preparation method and application thereof

Номер: CN115895110A
Автор: WU YIJIAN, WANG DAOJUAN, YU FEI, CHEN PINGXU, YE NANBIAO, SUN GANG, XIE ZHENGRUI, ZUO LIZENG, LU CHAOLIANG, WU GUOFENG, CHEN GUIJI, LI WEI, CHEN YAN'AN
Принадлежит:

The invention belongs to the technical field of high polymer materials, and particularly relates to a polypropylene composition as well as a preparation method and application thereof. The polypropylene composition comprises the following components in parts by weight: 60-80 parts of fresh material polypropylene, 20-40 parts of recycled polypropylene and 1-5 parts of other auxiliaries, the melt index stability index of the new material polypropylene is 1.1-1.3; the melting point of the recycled polypropylene is 154-164 DEG C; the melt index stability index of the recycled polypropylene is 1.5 to 3.0. The polypropylene composition disclosed by the invention can realize higher adhesive property, the selected raw materials are convenient and easy to obtain, the production process is simple, and the polypropylene composition is suitable for large-scale production.

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Номер записи: 1
11-07-2023 дата публикации

Polypropylene composite material as well as preparation method and application thereof

Номер: CN116410547A
Автор: ZUO LIZENG, WU YIJIAN, SUN GANG, LU CHAOLIANG, LIU LEWEN, CHENG WENCHAO, YANG XIAOYUN, CHEN GUIJI, XIE ZHENGRUI
Принадлежит:

The invention belongs to the technical field of high polymer materials, and particularly discloses a polypropylene composite material as well as a preparation method and application thereof. The polypropylene composite material comprises co-polypropylene, a halogen-free intumescent flame retardant, a one-dimensional filler, a coupling agent, a lubricant and an antioxidant, meets V-0 level in a UL94 vertical combustion test, has a bending modulus of greater than 2800MPa, and has precipitation resistance of 1.2-1.6.

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Номер записи: 2
18-02-2015 дата публикации

Preparation method of graphene/polyimide-based carbon aerogel

Номер: CN104355302A
Автор: LIU TIANXI, ZHANG YOUFANG, FAN WEI, HUANG YUNPENG, ZUO LIZENG, LAI FEILI, MIAO YUEE
Принадлежит:

The invention belongs to the technical field of nanoporous material, namely carbon aerogel, and particularly relates to graphene oxide-crosslinked polyimide-based carbon aerogel and a preparation method thereof. The invention carbon aerogel is prepared by crosslinking polyamide acid aerogel by graphene oxide, and comprises the components of graphene oxide and one or more water-soluble polyimide precursor-polyamide acids. The preparation method comprises the following steps: mixing an aqueous graphene oxide solution with the water-soluble polyimide precursor-polyamide acid, and preparing graphene oxide/polyamide acid aerogel through sol-gel and freeze-drying processes; preparing the graphene/polyimide-based carbon aerogel through thermal imidization and high temperature carbonization. According to the preparation method, a toxic reagent formaldehyde is not used; the prepared carbon aerogel has a mesoporous, microporous and macroporous three-level three-dimensional network porous structure ...

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Номер записи: 3
09-06-2023 дата публикации

Polypropylene composition as well as preparation method and application thereof

Номер: CN116239838A
Автор: ZUO LIZENG, WU YIJIAN, SUN GANG, LU CHAOLIANG, CHEN YAN'AN, LIU LEWEN, YANG XIAOYUN, CHEN GUIJI, CHENG WENCHAO, XIE ZHENGRUI
Принадлежит:

The invention belongs to the technical field of high polymer materials, and particularly relates to a polypropylene composition as well as a preparation method and application thereof. The polypropylene composition is prepared from the following components in parts by weight: 30 to 80 parts of homo-polypropylene, 20 to 70 parts of co-polypropylene and 0.2 to 2 parts of antioxidant, the frequency corresponding to the loss tangent tan delta = 1 of the homo-polypropylene is 10-30 rad/s, and the corresponding modulus is 9000-35000MPa; the frequency corresponding to the loss angle tangent tan delta = 1 of the co-polypropylene is 10 to 55 rad/s, and the corresponding modulus is 30000 to 40000 MPa. The polypropylene composition prepared by the invention has the advantages of moderate melt strength, narrower cell size distribution, high weight reduction ratio and the like, and the prepared polypropylene material can be well suitable for plastic molding processes such as blow molding foaming, blow ...

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Номер записи: 4
14-07-2023 дата публикации

Flame-retardant weather-resistant polypropylene composite material as well as preparation method and application thereof

Номер: CN116426073A
Автор: ZUO LIZENG, WU YIJIAN, SUN GANG, LU CHAOLIANG, LIU LEWEN, CHENG WENCHAO, YANG XIAOYUN, CHEN GUIJI, XIE ZHENGRUI
Принадлежит:

The invention belongs to the technical field of high polymer materials, and discloses a flame-retardant weather-resistant polypropylene composite material as well as a preparation method and application thereof. The flame-retardant and weather-resistant polypropylene composite material disclosed by the invention comprises the following components in parts by weight: 1-32 parts of homo-polypropylene; the flame-retardant polypropylene composite material is prepared from, by weight, 20-60 parts of co-polypropylene, 15-18 parts of brominated flame retardant, 5-6 parts of antimony trioxide, 15-25 parts of talcum powder, 0.2-1 part of carbon black and 0.1-1.5 parts of auxiliaries. The prepared composite material has excellent weather resistance, flame retardance and mechanical property and is low in cost. The method can be used for preparing products such as parts in long-term direct sunlight contact.

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Номер записи: 5