ОСОБЕННОСТИ РЕОЛОГИЧЕСКОГО ПОВЕДЕНИЯ ГИДРОГЕЛЕЙ КРАХМАЛА МОДИФИЦИРОВАННЫХ СИНТЕТИЧЕСКИМИ ЛАТЕКСАМИ
Аннотация
Изучены реологические свойства крахмально-латексных композиций, подвергнутых механоактивации в роторно-импульсном аппарате. Показано, что для оценки эффективности модификации крахмала латексами на практике можно использовать подход, основанный на выборе нескольких интегральных критериев для описания свойств синтетического сополимера, как модификатора. Несколько интегральных критериев - гибкость, полярность и гидрофильность макромолекул, размер и электрокинетический потенциал частиц – были выбраны для оценки эффективности модификации крахмала синтетическими сополимерными латексами. Установлено, что рост вязкости композиций наблюдается для более гибких полимеров Binder RA, Binder A, Рузин с температурой стеклования (Tg) ниже 25оС. Полимеры БАК Р и Аквапол с высокими значениями модуля Е’ снижают вязкость. Гидрофильность полимеров-допантов вносит определенный вклад в увеличение вязкости композиций. Отмечено повышение вязкости композиций при увеличении среднего размера частиц латексов.
Литература
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