Electrical and morphological properties of composite films near the percolation threshold: models of composite structures

2004 ◽  
Vol 459 (1-2) ◽  
pp. 174-177 ◽  
Author(s):  
Rudolf Hrach ◽  
Martin Švec ◽  
Stanislav Novák ◽  
Dalibor Sedlák
Keyword(s):  
Percolation Threshold ◽  
Composite Structures ◽  
Composite Films ◽  
Morphological Properties ◽  
Threshold Models

Role of ion energy flux on the structural and morphological properties of silicon oxy-nitride composite films deposited by plasma focus device

2018 ◽  
Vol 173 (11-12) ◽  
pp. 929-943
Author(s):  
Ijaz Ahmad Khan ◽  
Syed Anwaar Hussain ◽  
Amjad Farid ◽  
Ali Hussnain ◽  
Zeshan Adeel Umar ◽  
...  
Keyword(s):  
Energy Flux ◽  
Plasma Focus ◽  
Composite Films ◽  
Plasma Focus Device ◽  
Morphological Properties ◽  
Ion Energy

scholarly journals Effect of different solvents on the thermal, IR spectroscopy and morphological properties of solution casted PLA/starch films.

2014 ◽  
Vol 10 (1) ◽  
Author(s):  
M. A. A. Saidi ◽  
W. A. W. A. Rahman ◽  
R. A. Majid
Keyword(s):  
Ir Spectroscopy ◽  
Composite Films ◽  
Morphological Properties ◽  
Biodegradable Film ◽  
Starch Films

PLA/starch films were prepared by using three different solvent which is consist of chloroform, acetonitrile, and tetrahydrofuran. Similarly, composite films prepared using co-solvent of choloroform-acetonitrile (C-Ac) and choloroform- tetrahydrofuran (C-THF) were also investigated. Their properties were characterized by using TGA, DSC, IR spectroscopy and SEM. It was found that the acetonitrile casted biodegradable film achieved superior properties compared to films prepared by Ac, THF, C-Ac and C-THF.

scholarly journals Electrically Insulating Plasma Polymer/ZnO Composite Films

Materials ◽  
2019 ◽  
Vol 12 (19) ◽  
pp. 3099 ◽  
Author(s):  
Ahmed Al-Jumaili ◽  
Avishek Kumar ◽  
Kateryna Bazaka ◽  
Mohan V. Jacob
Keyword(s):  
Dielectric Constant ◽  
Electrical Properties ◽  
Composite Structures ◽  
Composite Films ◽  
Single Step ◽  
Dielectric Constants ◽  
Plasma Polymer ◽  
Nanocomposite Films ◽  
Step Method ◽  
Metal Insulator Metal

In this report, the electrical properties of plasma polymer films functionalized with ZnO nanoparticles were investigated with respect to their potential applications in biomaterials and microelectronics fields. The nanocomposite films were produced using a single-step method that combines simultaneous plasma polymerization of renewable geranium essential oil with thermal decomposition of zinc acetylacetonate Zn(acac)2. The input power used for the deposition of composites were 10 W and 50 W, and the resulting composite structures were abbreviated as Zn/Ge 10 W and Zn/Ge 50 W, respectively. The electrical properties of pristine polymers and Zn/polymer composite films were studied in metal–insulator–metal structures. At a quantity of ZnO of around ~1%, it was found that ZnO had a small influence on the capacitance and dielectric constants of thus-fabricated films. The dielectric constant of films with smaller-sized nanoparticles exhibited the highest value, whereas, with the increase in ZnO particle size, the dielectric constant decreases. The conductivity of the composites was calculated to be in the in the range of 10−14–10−15 Ω−1 m−1, significantly greater than that for the pristine polymer, the latter estimated to be in the range of 10−16–10−17 Ω−1 m−1.

Studies on the thermal, mechanical, compatibility, and morphological properties of zinc-neutralized ethylene/methacrylic acid copolymer ionomer blend with m-aramid

2019 ◽  
Vol 33 (9) ◽  
pp. 1234-1247
Author(s):  
R Balasubramanian ◽  
Sujin Park ◽  
Sam Soo Kim ◽  
Jaewoong Lee
Keyword(s):  
Composite Films ◽  
Weight Ratio ◽  
Morphological Properties ◽  
Thermal And Mechanical Properties ◽  
High Glass Transition Temperature ◽  
Acid Copolymer ◽  
Thermal Data ◽  
Mechanical Compatibility ◽  
Compatibilizing Effect ◽  
Binary Composite

A series of binary composite blends of m-aramid/zinc ionomer ( m-Ar/ZnI) with different weight ratio were prepared by the solution blend technique. These composite films were characterized in terms of the structure, crystallinity, morphology, thermal, and mechanical properties. The temperature corresponding to 5% ( T5%) weight loss are in the range of 101–438°C. The composite films showed good storage modulus (in the range of 2.1–3.1 GPa) and high glass transition temperature ( Tg) (in the range of 254–278°C) and exhibited good tensile strength but it decreased with an increase in the content of ZnI. The strong compatibilizing effect was observed between the m-Ar and ZnI components, where exceptionally self-assembled morphology was formed in the m-Ar/ZnI composite films. The most favorable mechanical and thermal data supported by the finest structure were observed with 3:0.50 weight ratio. This study evaluates the efficiency of ionomer in m-Ar/ZnI composite blends.

scholarly journals Electrical, Thermal, and Morphological Properties of Poly(ethylene terephthalate)-Graphite Nanoplatelets Nanocomposites

2017 ◽  
Vol 2017 ◽  
pp. 1-9 ◽  
Author(s):  
Basheer A. Alshammari ◽  
Arthur N. Wilkinson ◽  
Ghzzai Almutairi
Keyword(s):  
Electrical Conductivity ◽  
Percolation Threshold ◽  
Ethylene Terephthalate ◽  
Threshold Value ◽  
Morphological Properties ◽  
Degree Of Crystallinity ◽  
Graphite Nanoplatelets ◽  
Melt Compounding ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene

Graphite nanoplatelets (GNP) were incorporated with poly(ethylene terephthalate) (PET) matrix by melt-compounding technique using minilab compounder to produce PET-GNP nanocomposites, and then the extruded nanocomposites were compressed using compression molding to obtain films of 1 mm thickness. Percolation threshold value was determined using percolation theory. The electrical conductivity, morphology, and thermal behaviors of these nanocomposites were investigated at different contents of GNP, that is, below, around, and above its percolation threshold value. The results demonstrated that the addition of GNP at loading >5 wt.% made electrically conductive nanocomposites. An excellent electrical conductivity of ~1 S/m was obtained at 15 wt.% of GNP loading. The nanocomposites showed a typical insulator-conductor transition with a percolation threshold value of 5.7 wt.% of GNP. In addition, increasing screw speed enhanced the conductivity of the nanocomposites above its threshold value by ~2.5 orders of magnitude; this behavior is attributed to improved dispersion of these nanoparticles into the PET matrix. Microscopies results exhibited no indication of aggregations at 2 wt.% of GNP; however, some rolling up at 6 wt.% of GNP contents was observed, indicating that a conductive network has been formed, whereas more agglomeration and rolling up could be seen as the GNP content is increased in the PET matrix. These agglomerations reduced their aspect ratio and then reduced their reinforcement efficiency. NP loading (>2 wt.%) increased degree of crystallinity and improved thermal stability of matrix slightly, suggesting that 2 wt.% of GNP is more than enough to nucleate the matrix.

Microstructure and percolation threshold characteristics of reactive sputtered Au–TiO2 granular composite films

2006 ◽  
Vol 352 (5) ◽  
pp. 386-389 ◽  
Author(s):  
Jun-Bo Han ◽  
Sha Ding ◽  
Dai-Jian Chen ◽  
Zhong-Hua Hao ◽  
Qu-Quan Wang
Keyword(s):  
Percolation Threshold ◽  
Composite Films ◽  
Granular Composite

Effect of substrate temperature on optical and morphological properties of ZrO[sub 2]-MgO composite films

2013 ◽  
Author(s):  
R. B. Tokas ◽  
S. Jena ◽  
N. M. Kamble ◽  
S. Thakur ◽  
N. K. Sahoo
Keyword(s):  
Substrate Temperature ◽  
Composite Films ◽  
Morphological Properties
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