Improvement of the viscoelastic and thermal properties of polyvinyl acetate reinforced with organophilic clay (Algerian MMT)

2021 ◽  
pp. 132100
Author(s):  
Badia Imene Cherifi ◽  
Mohammed Belbachir ◽  
Abdelkader Rahmouni ◽  
Christophe Derail ◽  
Feriel Hannaoui ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Polyvinyl Acetate ◽  
Organophilic Clay

Preparation and characterization of poly(3-glycidoxypropyltrimethoxysilane) nanocomposite using organophilic montmorillonite clay (Mag-cetyltrimethylammonium)

2019 ◽  
Vol 53 (28-30) ◽  
pp. 4313-4322 ◽  
Author(s):  
Nadia Embarek ◽  
Nabahat Sahli ◽  
Mohammed Belbachir
Keyword(s):  
Thermal Properties ◽  
Preparation Method ◽  
X Ray Diffraction ◽  
Scanning Electronic Microscopy ◽  
X Ray ◽  
The Matrix ◽  
Organophilic Clay ◽  
Linear Poly ◽  
Organophilic Montmorillonite

Nanocomposites of linear poly(3-glycidoxypropyltrimethoxysilane) based on Algerian natural organophilic clay: montmorillonite–cetyltrimethylammonium named Maghnite-CTA were prepared by enhancing the dispersion of the matrix polymer in sheets of the organoclay. The effect of the organoclay, used with different amounts (3, 5, and 7% by weight) and the preparation method were studied in order to determine and evaluate their structural, morphological and thermal properties. X-ray diffraction analysis of obtained nanocomposites showed a significant change in the distance interlayer of montmorillonite–cetyltrimethylammonium. Therefore, interlayer expansion and exfoliation of linear poly(3-glycidoxypropyltrimethoxysilane) between layers of montmorillonite–cetyltrimethylammonium were observed. The thermal properties of the prepared nanocomposites were given by thermogravimetric analysis. The structure and morphology of the obtained materials were determined respectively by Fourier transform infrared spectroscopy and scanning electronic microscopy. The results obtained have approved the privilege of the intercalation of linear poly(3-glycidoxypropyltrimethoxysilane) in the interface of montmorillonite–cetyltrimethylammonium and the best quantity of organoclay required to prepare nanocomposite with a high thermal stability is 5% (by weight).

scholarly journals Improvement of the Thermal Properties of Sorel Cements

2020 ◽  
Author(s):  
Rim Zgueb ◽  
Amal Brichni ◽  
Noureddine Yacoubi
Keyword(s):  
Thermal Conductivity ◽  
Compressive Strength ◽  
Thermal Properties ◽  
Thermal Diffusivity ◽  
Thermal Insulation ◽  
Building Material ◽  
Polyvinyl Acetate ◽  
Cement Matrix ◽  
Photothermal Deflection

Sorel cements is a promising building material for insulation applications. Indeed, the effect of polyvinyl acetate polymer on cements has been investigated. The polyvinyl acetate polymer was added to the cement matrix with a percentage of 0, 5, 10, 15 and 20% by weight of Sorel cement. The thermal properties of Sorel cement were determined by photothermal deflection technique. Thermal properties such as thermal conductivity and thermal diffusivity are measured by coincidentally the experimental curves of the photothermal signal with the best corresponding theoretical curves. The results revealed that the incorporation of polyvinyl acetate polymer enhance the thermal insulation and reduce the compressive strength of Sorel cement.

scholarly journals THERMAL CHARACTERISTICS OF MODIFIED NONWOVEN MATERIALS BASED ON COTONIN FLAX

2019 ◽  
pp. 27-34
Author(s):  
Vera Anatol'yevna Loginova ◽  
Anna Vladimirovna Cheshkova ◽  
Irina Mikhaylovna Zakharova ◽  
Oskar Iosifovich Koyfman
Keyword(s):  
Thermal Properties ◽  
Polyvinyl Acetate ◽  
Thermal Characteristics ◽  
Polymeric Materials ◽  
Polymer Materials ◽  
Selective Hydrolysis ◽  
Polymer Binders ◽  
Nonwoven Materials ◽  
Thermal Analyzer ◽  
Hydrolysis Of

The ability of a material not to change its properties when heated is an important characteristic of nonwoven and fibrous polymeric materials (VPM). The interaction of binder components, flax cellulose and non-cellulose impurities will largely determine their properties, including resistance to thermal oxidation. In this paper were used as objects of research cotton linen, samples of purified cellulose, extracted lignin, cotton fiber based on cotton linen, impregnated with polymer binders. Enzyme-modified flax is obtained by effective fibration due to the selective hydrolysis of pectins and hemicelluloses, while structure-forming lignin has been preserved. The formation of VPM was performed by impregnation of undirected fibers located in the canvas with a binder based on 50% polyvinyl acetate emulsion and cyclic PA-6 oligomers (polymerization degree 6–11). Fiber-polymer materials based on cottonin- flax with various types of binders were obtained, their thermal properties were studied on the Synchronous Thermal Analyzer – STA 449 F3 Jupiter®. Resistance to burning was evaluated according to standard 12.4.184. The effect of the introduction of natural aluminosilicates on the thermal properties of fibrous-polymeric materials has been studied.It was revealed that fibrous-polymeric materials with the inclusion aluminosilicate (from Malostupino) have low burnability.

scholarly journals Green Nanocomposites from Rosin-Limonene Copolymer and Algerian Clay

Polymers ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 1971
Author(s):  
Hodhaifa Derdar ◽  
Geoffrey Robert Mitchell ◽  
Vidhura Subash Mahendra ◽  
Mohamed Benachour ◽  
Sara Haoue ◽  
...  
Keyword(s):  
Thermal Properties ◽  
In Situ Polymerization ◽  
Exchange Process ◽  
Lower Amount ◽  
Mechanical And Thermal Properties ◽  
Electronic Microscopy ◽  
Degradation Temperature ◽  
Ultrasonic Assisted ◽  
Organophilic Clay ◽  
Clay Layers

Green nanocomposites from rosin-limonene (Ros-Lim) copolymers based on Algerian organophilic-clay named Maghnite-CTA+ (Mag-CTA+) were prepared by in-situ polymerization using different amounts (1, 5 and 10% by weight) of Mag-CTA+ and azobisisobutyronitrile as a catalyst. The Mag-CTA+ is an organophilic montmorillonite silicate clay prepared through a direct exchange process; the clay was modified by ultrasonic-assisted method using cetyltrimethylammonuim bromide in which it used as green nano-filler.The preparation method of nanocomposites was studied in order to determine and improve structural, morphological, mechanical and thermal properties ofsin.The structure and morphology of the obtained nanocomposites(Ros-Lim/Mag-CTA+) were determined using Fourier transform infrared spectroscopy, X-ray diffraction, scanning electronic microscopy and transmission electronic microscopy. The analyses confirmed the chemical modification of clay layers and the intercalation of rosin-limonene copolymer within the organophilic-clay sheets. An exfoliated structure was obtained for the lower amount of clay (1% wt of Mag-CTA+), while intercalated structures were detected for high amounts of clay (5 and 10% wt of Mag-CTA+). The thermal properties of the nanocomposites were studied by thermogravimetric analysis (TGA) and show a significant improvement inthe thermal stability of the obtained nanocomposites compared to the purerosin-limonene copolymer (a degradation temperature up to 280 °C).

The thermal properties of some amine tetraphenylboron salts8-Quinolinol and its derivatives

1960 ◽  
Vol 23 ◽  
pp. 332-336 ◽  
Author(s):  
W WENDLANDT ◽  
J VANTASSEL ◽  
G ROBERTHORTON
Keyword(s):  
Thermal Properties

Thermal properties of an erbium-doped fibre amplifier

1990 ◽  
Vol 137 (3) ◽  
pp. 155 ◽  
Author(s):  
C.A. Millar ◽  
T.J. Whitley ◽  
S.C. Fleming
Keyword(s):  
Thermal Properties ◽  
Fibre Amplifier ◽  
Erbium Doped

Thermal properties of Sr0,3Ba0,7Ti1-yZryO3ferroelectric ceramics: Dependence on sample’s porosity

2005 ◽  
Vol 125 ◽  
pp. 309-311 ◽  
Author(s):  
S. García ◽  
E. Marín ◽  
O. Delgado-Vasallo ◽  
J. Portelles ◽  
G. Peña Rodríguez ◽  
...  
Keyword(s):  
Thermal Properties
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