ИССЛЕДОВАНИЕ ВЛИЯНИЯ ПОЛИМЕРНЫХ МИКРОСФЕР НА СВОЙСТВА РЕЗИНЫ ДЛЯ ГУММИРОВАНИЯ МЕТАЛЛИЧЕСКИХ ПОВЕРХНОСТЕЙ
Аннотация
В статье исследовано влияние полых полимерных микросфер LegaFoam 120MB, Expancel 920 DUT 40 и Expancel 930 DU 120 на реометрические показатели резиновой смеси, физико-механические и эксплуатационные свойства резины на основе на основе комбинации каучуков общего назначения изопренового (СКИ-3) и бутадиен-метилсти-рольного (СКМС-30АРК). Наряду с каучуками, изучаемая резиновая смесь содержала: вул-канизующий агент – серу; ускоритель вулканизации – 2,2҆-дибензтиазолдисульфид (аль-такс); активаторы вулканизации – белила цинковые, стеариновую кислоту; ускоритель пластикации – вухтазин РВ/Г-М; противостаритель – нафтам-2; замедлитель вулкани-зации – N-нитрозодифениламин; наполнитель – технический углерод П 803; мягчители – канифоль, нефтеполимерную смолу «СМПласт», битум нефтяной. Резиновую смесь го-товили на лабораторных вальцах ЛБ 320 160/160. Вулканизационные параметры резино-вой смеси исследовались на реометре MDR 3000 Basic фирмы «Mon Tech» при 150 °С в те-чение 40 мин в соответствии с ASTM D2084-79. Стандартные образцы для определения физико-механических показателей вулканизовали при температуре 150 °C в течение 40 мин в вулканизационном прессе типа P-V-100-3RT-2-PCD. Основные характеристики вулкани-затов определяли согласно действующим в резиновой промышленности стандартам. Установлено, что лучшими реометрическими показателями, наибольшими физико-меха-ническими свойствами и наименьшими их изменениями после старения на воздухе при 100 °С и выдержки в 20%-ных растворах соляной кислоты и едкого натрия при 23 °С в течение 24 часов обладает резина, содержащая 2,0 мас. ч. микросфер LegaFoam 120MB на 100 мас. ч. каучуков. Данная резиновая смесь может быть рекомендована для обрезинива-ния контактирующих с агрессивными средами металлических поверхностей.
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