The effect of pumice powder on mechanical and thermal properties of polypropylene

Abstract

Pumice stone (P), which is as a cheap material, can be a good candidate for filling material for polymers because of its high thermal resistance. Its effect on properties of polypropylene (PP) has not been studied in detail up to now. The mechanical, viscoelastic, thermal, morphological, crystallographic, and thermomechanical behaviors of PP filled with P powder were studied. The composites were produced by adding different weight fractions of P powder (0–40 wt%) into PP using a high-speed thermo kinetic mixer and compression molding. The highest tensile and flexural strength values, 26.5 and 46.4 MPa, respectively, were obtained when 10 wt% of P powder was filled into PP. Besides, the storage and loss modulus of PP was increased with the addition of P powder. The onset decomposition temperature of PP increased by 39°C with P powder loading into PP. The addition of P powder into PP led to a significant increase on the crystallinity of PP. It is interesting to report that thermal conductivity of PP was increased with increasing weight fraction of P powder.

Preparation of Pickering‐polyHIPEs from surface modified pumice stabilized high internal phase emulsions as supporting materials for lauric acid impregnation

“…Since pumice is abundant of polar groups and has a high surface area 40 this creates interactions with the polymer chains and contributed to the improvement of polymer properties. 21,41,42 Herein, the thermal stability behavior of the obtained Pickering-polyHIPEs can be explained by considering the amount of emulsifier and CtP loading due to the increased compatibility between the polymer phase and CtP. Emulsion stability and final pore morphology can be also accepted as a clue for the explanation of thermal degradation behavior.…”

Influence of Pumice Particles on the Mechanical and Morphology Properties of Polyester-Cornhusk Fiber Composites

“…Justus Kimia Raya with a density of 1.2 x 10-6 kg/cm3, tensile strength of 8.8 kg/mm2, and bending strength of 2.5 kg/mm 2 [1,9]. Pumice, which was used as a filler in this work, contains 74.10% SiO2, 13.45% aluminum oxide, 4.10% potassium oxide, and 3.70% sodium oxide [8].…”

“…(wt). [8] investigated the influence of volume fraction of pumice powder (0-40% wt) on the mechanical and thermal characteristics of polypropylene. They achieved the maximum tensile and bending strength of polypropylene at 26.5 and 46.4 MPa, respectively, with a volume fraction of 10% (wt) pumice powder.…”

Tek ve Hibrit Olarak Tarımsal Atık Takviyelendirici Dolguların Polipropilenin Mekanik ve Isıl Özellikleri Üzerindeki Etkileri

“…If stress is applied to particle filled polymeric material, energy dissipation takes place in the polymer matrix and interface between filler and matrix [28]. Relatively stronger interface can be described by less energy dissipation and lower intensity of tan delta peak [29][30]. Tan delta peak height is lower after RH and VS loading.…”