scholarly journals Thermo-mechanical Characterization of Insulating Bio-plasters Containing Recycled Volcanic Pyroclasts

2020 ◽  
Vol 14 (1) ◽  
pp. 66-77
Author(s):  
Loredana Contrafatto ◽  
Salvatore Gazzo ◽  
Antonio Purrazzo ◽  
Antonio Gagliano
Keyword(s):  
Thermal Properties ◽  
Volcanic Ash ◽  
Mechanical Characterization ◽  
Construction Material ◽  
Sustainable Construction ◽  
Mechanical And Thermal Properties ◽  
Water Absorption Coefficient ◽  
Hydraulic Lime ◽  
Natural Hydraulic Lime

Aim: The research proposes the reuse of volcanic wastes in the production of lightened and insulating bio-plasters. Introduction: The goal is the production of a novel sustainable construction material that reduces the environmental impact. Methods: Four mixtures were designed. The recycled Volcanic Ash was used in combination with two bio-compatible binders; basically Natural Hydraulic Lime (NHL) or calcium hydroxide blended with a commercial Portland cement (CH-CEM). To improve thermal properties, CH-CEM mixtures were treated with an Air Entraining Agent (AEA) in two different percentages and a breathable resin (R). The main physical, mechanical and thermal properties were experimentally determined. Results: The results of such analysis indicate that the mixture NHL, realized using hydraulic lime as a binder, do not satisfy the threshold of the water absorption coefficient, exceeding the limit established by UNI EN 998-1 standard. Conclusion: On the contrary, one of the mixtures CH-CEM, containing both AEA and R, is suitable for use as lightweight plastering mortar and also satisfies the requirements for insulating mortars.

Mechanical and thermal characterization of grafted PP-NCC nanocomposites

2019 ◽  
pp. 089270571987822
Author(s):  
Saud Aldajah ◽  
Mohammad Y Al-Haik ◽  
Waseem Siddique ◽  
Mohammad M Kabir ◽  
Yousef Haik
Keyword(s):  
Thermal Properties ◽  
Interfacial Adhesion ◽  
Thermal Characterization ◽  
Mechanical And Thermal Properties ◽  
Screw Extruder ◽  
Scanning Calorimetry ◽  
Three Point Bending ◽  
Twin Screw ◽  
Thermal Stability Of

This study reveals the enhancement of mechanical and thermal properties of maleic anhydride-grafted polypropylene (PP- g-MA) with the addition of nanocrystalline cellulose (NCC). A nanocomposite was manufactured by blending various percentages of PP, MA, and NCC nanoparticles by means of a twin-screw extruder. The influence of varying the percentages of NCC on the mechanical and thermal behavior of the nanocomposite was studied by performing three-point bending, nanoindentation, differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), and Fourier-transform infrared (FTIR) spectroscopy tests. The novelty of this study stems on the NCC nanoparticles and their ability to enhance the mechanical and thermal properties of PP. Three-point bending and nanoindentation tests revealed improvement in the mechanical properties in terms of strength, modulus, and hardness of the PP- g-MA nanocomposites as the addition of NCC increased. SEM showed homogeneity between the mixtures which proved the presence of interfacial adhesion between the PP- g-MA incorporated with NCC nanoparticles that was confirmed by the FTIR results. DSC and TGA measurements showed that the thermal stability of the nanocomposites was not compromised due to the addition of the coupling agent and reinforced nanoparticles.

Characterization of Mechanical and Thermal Properties of Poly(ethylene-co -vinyl acetate) with Differents Bentonites

2014 ◽  
Vol 343 (1) ◽  
pp. 88-95 ◽  
Author(s):  
Reinaldo Yoshio Morita ◽  
Juliana Regina Kloss ◽  
Ronilson Vasconcelos Barbosa
Keyword(s):  
Thermal Properties ◽  
Vinyl Acetate ◽  
Mechanical And Thermal Properties ◽  
Poly Ethylene

Synthesis and Characterization of Polymerized Ionic Liquids: Mechanical and Thermal Properties of a Novel Type of Hydrogels

2014 ◽  
Vol 215 (8) ◽  
pp. 716-724 ◽  
Author(s):  
Jenny Bandomir ◽  
André Schulz ◽  
Satomi Taguchi ◽  
Lena Schmitt ◽  
Hiroyuki Ohno ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Thermal Properties ◽  
Synthesis And Characterization ◽  
Mechanical And Thermal Properties

scholarly journals Synthesis and Characterization of Polyurethane-Nanoclay Composites

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Manasa Nayani ◽  
Subhashini Gunashekar ◽  
Nidal Abu-Zahra
Keyword(s):  
Thermal Properties ◽  
Cell Structure ◽  
Thermoplastic Polyurethane ◽  
Mechanical And Thermal Properties ◽  
Composite Foam ◽  
Weight Percentage ◽  
Nanocomposite Foams ◽  
Methylene Diphenyl Diisocyanate ◽  
Closed Mold

In this study polyurethane (PUR)-nanoclay composites were synthesized using methylene diphenyl diisocyanate, polyol, and hectorite clay. The weight percentage of hectorite clay was varied at three different levels to study its effect on the properties of the thermoplastic polyurethane nanocomposite. The nanocomposite polyurethane foam was synthesized in a 2-step reaction process. The first step involved the addition and dispersion of nanoclay into the isocyanate. The mixture was then mixed with the polyol, and the foam was cast in a preheated closed mold. The PUR-nanocomposite foams were analyzed for cell structure, physical, mechanical, and thermal properties. The composite foam showed significant increase in tensile and flexural strengths, abrasion resistance, and thermal properties.

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