No abstract

The article discusses the technological features of the reaction extrusion of nanocomposites based on dressed natural minerals and high density polyethylene modified with compatibilizer and polypropylene. Clinoptilolite, vesuviane, bentonite and talc were used as natural minerals. The optimal technological mode of reaction extrusion was selected. Dicumyl peroxide in the amount of 0.25 and 0.5 wt.% was used as a vulcanization agent. The influence of technological features of reaction extrusion on the basic physicomechanical properties of nanocomposites based on polyolefins is considered.

The basic physicomechanical properties of dynamically vulcanized elastoplastics based on random polypropylene and nitrile butadiene rubber are considered. It is shown that the higher the concentration of nitrile groups in the nitrile-butadiene rubber, the higher the limiting concentration of the elastomer to appear rubber-like properties in elastoplastics. In order to improve the compatibility of the components of the mixture, a graft copolymer of polypropylene with methacrylic acid was used as a compatibilizer. In contrast to sulfuric vulcanization, peroxide one contributes to a signifi cant deterioration of the melt fl ow index of elastoplastics.

No abstract

Проведен комплекс исследований по реакционной экструзии динамически вулканизованных нанокомпозитов на основе бентонита и смесей рандом полипропилена с различными марками бутадиен-нитрильного каучука. Установлено влияние температурного режима и давления экструзии, числа оборотов шнека, времени прохождения полимерной массы в материальном цилиндре, а также компатибилизатора, типа и концентрации сшивающего агента на основные физикомеханические свойства динамически вулканизованных нанокомпозитов.Ключевые слова: рандом полипропилен, бутадиен-нтрильный каучук, вулканизация, компатибилизатор, пероксид дикумила, сера, совместимость A set of studies on the reaction extrusion of dynamically vulcanized nanocomposites based on bentonite and mixtures of random polypropylene with various brands of nitrile butadiene rubber was carried out. The infl uence of the temperature and pressure of the extrusion, the speed of the screw, the time of passage of the polymer mass through the material cylinder, as well as the compatibilizer, the type and concentration of the crosslinking agent on the main physicomechanical properties of dynamically vulcanized nanocomposites is established.