Rheological and mechanical properties of filled with calcite concentrate polypropylene blends

International Conference Baltic Polymer Symposium 2018

Saitarly, S.^1 ; Rezanova, N.^1 ; Plavan, V.^1 ; Beleka, K.^2

Department of Applied Ecology, Technology of Polymers and Chemical Fibers, Kyiv National University of Technologies and Design, Nemirovich-Danchenkostr. 2, Kyiv

01011, Ukraine^1

Department of Chemistry and Technology of Polymers, Kaunas University of Technology, K. Donelaiio str. 73, Kaunas

LT-44249, Lithuania^2

关键词: Impact loadings;    Melt viscosities;    Modifying additives;    Plasticization effects;    Polypropylene blends;    Rheological and mechanical properties;    Rheological property;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/500/1/012034/pdf
DOI  :  10.1088/1757-899X/500/1/012034

来源: IOP

【 摘 要 】

It has been found that the addition of calcite concentrate 5-50% w/w allows regulation the rheological properties of polypropylene-based composition melts. It was established that the increasing of the amount of the filler up to 50% w/w in the PP based composition led to decrease of its melt viscosity by 40% comparing with initial polymer melt. This may be explained by the plasticization effect of stearic acid, which is commonly used to treat the surface of calcite concentrate. The addition of a propylene-octene block copolymer as a modifying additive makes it possible to produce high-filled materials that are more resistant to impact loading. The increasing the calcite concentrate content up to 10% w/w increases the impact strength by 10% compared with the initial polypropylene. Further increasing of calcite concentrate content up to 20% led to decrease impact strength almost to the value for the initial polypropylene, at not critical decrease in tensile strength. Elongation of compositions is higher with the presence of block copolymer. The developed compositions with propylene-octene block copolymer as a modifying additive can be used for production of automotive details.