Effect Of The Nitrile Content On Nitrile Rubber Cure In Wide Temperature Range

Авторы: Kalugin D.I., Nashchokin A.V., Sutyagina A., Tikhonov N.A., Malakho A.P., Avdeev V.V.
Журнал: International Journal of Scientific and Technology Research
Том: 9
Номер: 2
Год издания: 2020
Первая страница: 4658
Последняя страница: 4662
Аннотация: Vulcanization of NBR rubber with different nitrile content was studied. Enthalpy of vulcanization drops from 6.62J/g for 18% nitrile rubber to 1.89J/g for 40% one. The peak of vulcanization shifts to higher temperatures for 12°C with nitrile content increase. No secondary vulcanization process was observed for 18% nitrile rubber. The other rubbers possess thermal polymerization at 285°C in neat rubbers accelerated by nitrile groups. This process is additionally accelerated when vulcanization additives are present in rubber. Thus the post-vulcanization peak shifts up to 20°C to lower temperatures for 40% nitrile rubber with increase in enthalpy in 5 times compared to neat rubber. When heated at 250°C for 6 hours no significant change in rubber hardness is occurred for 18% nitrile rubber and 2 times increase for 40% nitrile rubber is measured indicating dramatic role of nitrile content for rubber properties. No considerable effect of nitrile groups cross link on rubber hardness is observed.
Добавил в систему: Карзов Илья Михайлович

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