scholarly journals The Accelerated Aging Impact on Mechanical and Thermal Properties of Polypropylene Composites with Sedimentary Rock Opoka-Hybrid Natural Filler

Materials ◽  
2022 ◽  
Vol 15 (1) ◽  
pp. 338
Author(s):  
Paulina Jakubowska ◽  
Grzegorz Borkowski ◽  
Dariusz Brząkalski ◽  
Bogna Sztorch ◽  
Arkadiusz Kloziński ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Calcium Carbonate ◽  
Accelerated Aging ◽  
Natural Material ◽  
Accelerated Weathering ◽  
Mechanical And Thermal Properties ◽  
Hybrid Filler ◽  
Polypropylene Composites ◽  
Natural Filler ◽  
The Impact

This paper presents the impact of accelerated aging on selected mechanical and thermal properties of isotactic polypropylene (iPP) composites filled with sedimentary hybrid natural filler-Opoka rock. The filler was used in two forms: an industrial raw material originating as a subsieve fraction natural material, and a rock calcinated at 1000 °C for production of phosphorous sorbents. Fillers were incorporated with constant amount of 5 wt % of the resulting composite, and the material was subjected to accelerated weathering tests with different exposition times. The neat polypropylene and composites with calcium carbonate as a reference filler material were used for comparison. The aim of the research was to determine the possibility of using the Opoka rock as a new hybrid filler for polypropylene, which could be an alternative to the widely used calcium carbonate and silica. The thermal, mechanical, and structural properties were evaluated by means of differential scanning calorimetry (DSC), tensile tests, scanning electron microscopy (SEM), and Fourier-transform infrared spectroscopy with attenuated total reflectance (FTIR/ATR) prior to and after accelerated aging. As a result, it was found that the composites of polypropylene with Opoka were characterized by similar or higher functional properties and higher resistance to photodegradation compared to composites with conventional calcium carbonate. The results of measurements of mechanical properties, structural and surface changes, and the carbonyl index as a function of accelerated aging proved that Opoka was an effective ultraviolet (UV) stabilizer, significantly exceeding the reference calcium carbonate in this respect. The new hybrid filler of natural origin in the form of Opoka can therefore be used not only as a typical powder filler, but above all as a UV blocker/stabilizer, thus extending the life of polypropylene composites, especially for outdoor applications.

Hybridization Effect of Kaolin and Calcium Carbonate on Tensile and Thermal Properties of Compatibilized Polypropylene Composites

2014 ◽  
Vol 803 ◽  
pp. 93-98
Author(s):  
M.T. Muhammad Faheem ◽  
M. Muhammad Safwan ◽  
A.M. Mustafa Al Bakri
Keyword(s):  
Thermal Properties ◽  
Calcium Carbonate ◽  
Hybrid Composites ◽  
Testing Machine ◽  
Thermoplastic Composites ◽  
Melt Mixing ◽  
Tensile Testing Machine ◽  
Hybrid Filler ◽  
Polypropylene Composites ◽  
Hybridization Effect

In this study, effect of combination between two fillers, Kaolin and Calcium Carbonate into Polypropylene (PP) composites was investigated. Hybrid thermoplastic composites from Kaolin and Calcium Carbonate were manufactured via melt mixing process involving Brabender internal mixer. Polypropylene grafted Maleic Anhydride (PP-g-MA) was also blend together with Polypropylene and both fillers during melt mixing. Single filler system composites were also introduced in this study in order to have comparison with hybrid filler system composites. Tensile, morphological and thermal properties of hybrid composites were discovered by Instron 5569 tensile testing machine, scanning electron microscopy (SEM) and thermogravimetric analyzer (TGA). Tensile test shows that additional of two fillers, kaolin and calcium carbonate could increase the strength and modulus of PP matrix. Calcium carbonate gives better strength and modulus for PP matrix compared to kaolin. However, the usage of calcium carbonate and kaolin deteriorate the elongation at break of PP matrix. The usage of two different fillers also embellish PP matrix by improve the thermal stability of the composites.

scholarly journals Accelerated aging of WPCs Based on Polypropylene and Birch plywood Sanding Dust

2021 ◽  
Vol 11 (1) ◽  
pp. 319-328
Author(s):  
Janis Kajaks ◽  
Karlis Kalnins ◽  
Juris Matvejs
Keyword(s):  
Accelerated Aging ◽  
Degree Of Crystallinity ◽  
Accelerated Weathering ◽  
Recrystallization Process ◽  
Surface Layers ◽  
Uv Aging ◽  
Polypropylene Composites ◽  
Weathering Processes ◽  
Melting Temperatures ◽  
Dsc Measurements

Abstract A lot of researchers are closely related with natural, lignocellulose fibre containing bio-composites production and studies. Various of polymer matrices, mainly polyolefins, combinations with natural fibres as a reinforcement are used. Our studies are focused on polypropylene based bio-composites containing birch plywood production by-product sanding dust (PSD) accelerated weathering processes. The obtained results showed the following sight. After the aging the surface of all samples had faded, the changes of the gloss (decreasing) and of the whiteness degree (increasing) also had taken place, but microhardness of the surface of specimens significantly has decreased. The tensile strength and modulus of the samples after UV aging diminished about 30–35%. That indicates to the changes not only in the surface layers of polymer but also inside of the polymer structure. The FTIR measurements showed that during UV aging process occurs significant changes of chemical structure of the weathered surface of all samples. DSC measurements showed an increase of degree of crystallinity of the weathered polypropylene composites after the first heating due to the recrystallization process in the polypropylene matrix and a small decreasing after second heating. The melting temperatures of all composites after UV aging considerably diminish up to 30°C.

Studies on Mechanical and Thermal Properties of Epoxy Resin Modified by Fluorine-Containing Silicone

2013 ◽  
Vol 401-403 ◽  
pp. 713-716
Author(s):  
Cheng Fang ◽  
Dong Bo Guan ◽  
Wei Guo Yao ◽  
Shou Jun Wang ◽  
Hui An
Keyword(s):  
Glass Transition ◽  
Thermal Properties ◽  
Epoxy Resin ◽  
Bending Strength ◽  
Mechanical And Thermal Properties ◽  
Curing Agent ◽  
Epoxy System ◽  
Resin Curing ◽  
The Impact ◽  
Modified Epoxy

The epoxy resin was modified with the mixture of α,ω-dihydroxy poly-(3,3,3-trifluoropropyl) siloxane (PTFPMS), KH560 and stannous octoate. KH560 can react with PTFPMS and also epoxy resin curing agent. The two reactions were characterized by FI-IR. The modified epoxy resin was characterized by FI-IR. The result showed that fluorine-containing silicone had been successfully introduced into the epoxy system. The mechanical and thermal properties of the modified epoxy resin were analyzed. The results showed that with the increase of PTFPMS the impact strength of epoxy resin increased, hardness and bending strength correspondingly reduced, slight decrease in the glass transition temperature.

Mechanical and thermal properties of calcium carbonate-filled PP/LLDPE composite

2011 ◽  
Vol 121 (4) ◽  
pp. 2413-2421 ◽  
Author(s):  
Mustafa Abu Ghalia ◽  
Azman Hassan ◽  
Abdirahman Yussuf
Keyword(s):  
Thermal Properties ◽  
Calcium Carbonate ◽  
Mechanical And Thermal Properties

ZnO nanowire-decorated Al2O3 hybrids for improving the thermal conductivity of polymer composites

2020 ◽  
Vol 8 (16) ◽  
pp. 5380-5388
Author(s):  
Chao Liu ◽  
Wei Wu ◽  
Dietmar Drummer ◽  
Wanting Shen ◽  
Yi Wang ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Thermal Properties ◽  
Polymer Composites ◽  
High Thermal Conductivity ◽  
Mechanical And Thermal Properties ◽  
Zno Nanowire ◽  
Hybrid Filler

The needle-like Al2O3–ZnO nanowire hybrid filler endows polymer composites with high thermal conductivity, mechanical and thermal properties.

scholarly journals Mechanical and Thermal Properties of Polypropylene Composites Reinforced with Lignocellulose Nanofibers Dried in Melted Ethylene-Butene Copolymer

Materials ◽  
2014 ◽  
Vol 7 (10) ◽  
pp. 6919-6929 ◽  
Author(s):  
Shinichiro Iwamoto ◽  
Shigehiro Yamamoto ◽  
Seung-Hwan Lee ◽  
Hirokazu Ito ◽  
Takashi Endo
Keyword(s):  
Thermal Properties ◽  
Mechanical And Thermal Properties ◽  
Polypropylene Composites ◽  
Lignocellulose Nanofibers
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