RU2007146341A - METHOD FOR PRODUCING ULTRA-MOLECULAR POLYACRYLONITRILE - Google Patents
METHOD FOR PRODUCING ULTRA-MOLECULAR POLYACRYLONITRILE Download PDFInfo
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- RU2007146341A RU2007146341A RU2007146341/04A RU2007146341A RU2007146341A RU 2007146341 A RU2007146341 A RU 2007146341A RU 2007146341/04 A RU2007146341/04 A RU 2007146341/04A RU 2007146341 A RU2007146341 A RU 2007146341A RU 2007146341 A RU2007146341 A RU 2007146341A
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- dimethylformamide
- molecular weight
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Abstract
Способ получения сверхвысокомолекулярного полиакрилонитрила, основанный на использовании механизма анионной полимеризации, включающий подготовку исходных реагентов, синтез анионного инициатора, проведение процессов полимеризации, выделение и сушку полученных полимеров, отличающийся тем, что полимеризацию проводят в атмосфере аргона с использованием свежеперегнанных растворителя-диметилформамида в количестве 350-460 мл и мономера-акрилонитрила в количестве 60-70 мл, обеспечивают температурный режим процесса, создавая начальную температуру реакционной смеси -50÷-20°С, вводят количество инициатора 1,2-бис-диэтиламино-2-оксоэтанолата лития, не превышающее 0,52·10-3 молей, реакционную смесь дезактивируют через 15-60 с после начала процесса смесью диметилформамида и уксусной кислоты в соотношении по объему 10:1, полимер высаживают в воду, выделяют фильтрованием, промывают водой и сушат при температуре 60°С, получают полимеры с выходами от 80 до 100% и характеристиками сверхвысокомолекулярного полиакрилонитрила.A method of producing ultra-high molecular weight polyacrylonitrile based on the use of anionic polymerization mechanism, including preparation of starting reagents, synthesis of anionic initiator, polymerization processes, isolation and drying of the obtained polymers, characterized in that the polymerization is carried out in an argon atmosphere using freshly distilled solvent-dimethylformamide in an amount of 350- 460 ml and monomer-acrylonitrile in the amount of 60-70 ml, provide the temperature regime of the process, creating an initial temperature atura of the reaction mixture is -50 ÷ -20 ° С, the amount of lithium 1,2-bis-diethylamino-2-oxoethanolate initiator is added, not exceeding 0.52 · 10-3 moles, the reaction mixture is deactivated 15-60 s after the start of the process with the mixture dimethylformamide and acetic acid in a volume ratio of 10: 1, the polymer is precipitated into water, isolated by filtration, washed with water and dried at a temperature of 60 ° C, polymers are obtained with yields from 80 to 100% and characteristics of ultra-high molecular weight polyacrylonitrile.
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Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RU2007146341/04A RU2376319C2 (en) | 2007-12-13 | 2007-12-13 | Method of producing ultrahigh molecular polyacrylonitrile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RU2007146341/04A RU2376319C2 (en) | 2007-12-13 | 2007-12-13 | Method of producing ultrahigh molecular polyacrylonitrile |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| RU2007146341A true RU2007146341A (en) | 2009-06-20 |
| RU2376319C2 RU2376319C2 (en) | 2009-12-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| RU2007146341/04A RU2376319C2 (en) | 2007-12-13 | 2007-12-13 | Method of producing ultrahigh molecular polyacrylonitrile |
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| RU (1) | RU2376319C2 (en) |
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- 2007-12-13 RU RU2007146341/04A patent/RU2376319C2/en not_active IP Right Cessation
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| Publication number | Publication date |
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| RU2376319C2 (en) | 2009-12-20 |
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| MM4A | The patent is invalid due to non-payment of fees |
Effective date: 20151214 |