TY - JOUR

T1 - Influence of compounding technology on rheological, thermal and mechanical behavior of blast furnace slag filled polystyrene compounds

AU - Mostafa, Abdelhamid

AU - Pacher, Gernot A.

AU - Lucyshyn, Thomas

AU - Holzer, Clemens

AU - Flachberger, Helmut

AU - Krischey, Elke

AU - Fritz, Bertram

AU - Laske, Stephan

PY - 2017

Y1 - 2017

N2 - The influence of melt-compounding technique on blast furnace slags (BFS) filled polystyrene (PS) compounds was investigated. BFS are byproducts of iron industry, and are formed during the production of iron via thermo-chemical reduction in blast furnaces. BFS are mineral-structured materials composed of severeal such as silicon oxide (SiO2), calcium oxide (CaO), magnesium oxide (MgO) and alumina (Al2O3) as well as other minor oxides and elements. Such combination of oxides might be of technical advantage if BFS is properly prepared and tailored for use as a functional filler for PS. In addition, BFS is outstandingly inexpensive and require minimal refining costs compared to common mineral fillers used in polymer industry such as calcium carbonate and talc, giving BFS an economic significance. In current study, compounds were produced via melt-compounding approach, where two different processing technologies were used: (1) Laboratory rotor-blade internal mixer (IM) and (2) co-rotating, twin-screw compounding extruder (TSC). It was found that compounding process did not yield a strong influence on the rheological properties, where comparable levels for shear viscosity, storage- and loss moduli were observed for all compounds except for ‘20G40 TSC’ compound. Such deviancy was clear in thermal properties of this particular compound, where slightly lower transition temperature (Tg) as well as higher specific heat capacity (Cp) were reported. For mechanical behavior, comparable stress-strain curves and young’s modulus values for both processes were witnessed. Deviant ‘20G40 TSC’ compound showed slightly lower young’s modulus compared to corresponding IM.

AB - The influence of melt-compounding technique on blast furnace slags (BFS) filled polystyrene (PS) compounds was investigated. BFS are byproducts of iron industry, and are formed during the production of iron via thermo-chemical reduction in blast furnaces. BFS are mineral-structured materials composed of severeal such as silicon oxide (SiO2), calcium oxide (CaO), magnesium oxide (MgO) and alumina (Al2O3) as well as other minor oxides and elements. Such combination of oxides might be of technical advantage if BFS is properly prepared and tailored for use as a functional filler for PS. In addition, BFS is outstandingly inexpensive and require minimal refining costs compared to common mineral fillers used in polymer industry such as calcium carbonate and talc, giving BFS an economic significance. In current study, compounds were produced via melt-compounding approach, where two different processing technologies were used: (1) Laboratory rotor-blade internal mixer (IM) and (2) co-rotating, twin-screw compounding extruder (TSC). It was found that compounding process did not yield a strong influence on the rheological properties, where comparable levels for shear viscosity, storage- and loss moduli were observed for all compounds except for ‘20G40 TSC’ compound. Such deviancy was clear in thermal properties of this particular compound, where slightly lower transition temperature (Tg) as well as higher specific heat capacity (Cp) were reported. For mechanical behavior, comparable stress-strain curves and young’s modulus values for both processes were witnessed. Deviant ‘20G40 TSC’ compound showed slightly lower young’s modulus compared to corresponding IM.

KW - Blast furnace slag

KW - process comparison

KW - melt compounding

KW - polystyrene

U2 - 10.1063/1.5016780

DO - 10.1063/1.5016780

M3 - Article

VL - 1914.2017

JO - AIP Conference Proceedings

JF - AIP Conference Proceedings

SN - 0094-243X

IS - 1

M1 - 150003

ER -