2 edition of Influence of moisture on the tracking performance of various organic polymers found in the catalog.
Influence of moisture on the tracking performance of various organic polymers
|Statement||Djoko Saputro ; supervised by L. Warren.|
|Contributions||Warren, L., Electrical Engineering and Electronics.|
Polymer Testing focuses on the testing, analysis and characterization of polymer materials, including both synthetic and natural or biobased polymers. Novel testing methods and the testing of novel polymeric materials in bulk, solution and dispersion is covered. In addition, we welcome the submission of the testing of polymeric materials for a wide range of applications and industrial products. In organopolysilazanes, at least one organic substituent is bound to the silicon atom. The amount and type of organic substituents have a predominant influence on the macro-molecular structure of polysilazanes. Silazane copolymers are normally produced from ammonolyses of chlorosilane mixtures. In this chemical reaction, different chlorosilanes. The interaction of water with many biopolymers is known to rearrange their internal structure, make them moisture sensitive, and influence their physical properties. We study amorphous cellulose and hemicellulose, two hydrophilic biopolymers, using molecular dynamics simulations, and we analyze their structural and physical properties over the Cited by: Please note: If you switch to a different device, you may be asked to login again with only your ACS ID. The Journal of Organic Chemistry. Fire Performance of Organic Polymers, Thermal Decomposition, and Chemical Composition.
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Conjugated polymers such as poly(3-hexylthiophene) (P3HT) are commonly used as semiconducting components in organic photovoltaics (OPVs) and organic thin-film transistors (OTFTs). Such devices may be exposed to oxygen or moisture in air and increased temperature during operation, potentially affecting their Journal of Materials Chemistry C Emerging InvestigatorsCited by: 5.
This article presents an analysis of the influence of moisture on the mechanical properties Influence of moisture on the tracking performance of various organic polymers book polyvinyl-acetate. The analysis of shear compliance functions, obtained at several different moisture contents, indicates that the effect of moisture could be explained by the time-humidity superposition principle.
The effects of moisture content and time on mechanical behavior of polymer materials are investigated both theoretically and experimentally in this paper.
An equivalence relationship between time intervals and the moisture content for polymer nylon-6 has been established by way of experimental observation and measured results.
The relationship shows that there exists equivalence between Cited by: 3. Influence of Moisture-Uptake on Mechanical Properties of Polymers Used in Microelectronics. Polymers are currently considered as a possible alternative to silicon dioxide in the fabrication of interlevel dielectrics.
Moisture in plastic material before its processing can have negative influence on physical or thermal properties of a product and can devalue visual aspect of the end product, thus these plastics. Two copolymers were investigated for long-term influence of environmental factors.
The polymers were exposed in the. open air, in a special containers kept in the open air and in damp cellar. Microbiological evaluation of the exposed. materials showed that these copolymers were contaminated by micromycetes. Carboxylate substitution is a common approach to tune the energy level of donor polymers for organic solar cells.
However, the influence of carboxylate substitution on the morphological and electronic properties of donor polymers is not well cincinnatiblackhistory.com by: 3. In Performance of Bio-based Building Materials, Abstract.
Bio-based materials, like all materials, are likely to experience a range of environments and challenges that can affect the performance of the material, such as the effects of weathering and cincinnatiblackhistory.com addition, as bio-based materials are organic in their nature, this means that they are likely to be susceptible to attack by.
Improved biodegradable plastics performance has also had a positive influence on global demand. The potential of compostable polymer materials depends on a further reduction in price, development of the cost of fossil resources, process optimization and scaling up supported by full life cycle assessment analysis.
Electrical Properties of Different Polymeric Materials and their Applications: The Influence of Electric Field. By Sk Manirul Haque, Jorge Alfredo Ardila Rey, Abdullahi Abubakar Masúd, Yunusa Umar and Ricardo Albarracin chemistry, biology, materials science as well as for electrical engineering.
Organic polymers are stable at high Cited by: 4. May 18, · The influence of moisture on the mechanical properties of fibre-reinforced polymer matrix composites (PMCs) was investigated.
Four materials had been take into account considering: both 2×2-Twill woven carbon fibre or glass fibre, thermosetting matrix (Epoxy Resin) or thermoplastic matrix (Polyphenylene Sulfide).
The specimens were submitted for hours to a hygrothermic test to Cited by: 1. The moisture does not break up the backbone of these polymers. With other resins like PET, PBT, PC, nylon, and TPU exposure to moisture at processing temperature causes a chemical reaction (hydrolysis), which breaks long chains into shorter fragments, reducing strength and other properties.
The moisture absorption in some molding compounds can be characterized by linearly decreasing diffusivity as a function of average moisture content , while for highly non-Fickian diffusion of some organic substrates a power- law relation between the diffusivity and Cited by: Conjugated polymers have attracted broad academic and industrial interest for various optoelectronic applications.
Conjugated polymers possess obvious advantages toward inorganic materials and small-molecule organic materials, such as light weight, low cost, and flexibility.
Furthermore, most polymer materials are soluble in common solvents thus polymer films can be prepared through solution. The coating methods are normally categorized as organic, inorganic, and metallurgical coatings.
In more detail, the photo-grafting polymerization, the initiated chemical vapor deposition, and the UV-curable coatings are utilized for organic coatings on polymers.
Organic electronics utilize carbon-based small molecules and polymers as the active electronic layers. Different materials can be adopted as semiconductors, dielectrics (insulators), or even injecting electrodes (conductors) [12–14].
Organic semiconductors combine functional tunability with the low cost per unit area offered by their production in large volumes, using solution-based approaches, but unfortunately organic devices suffer from insufficient performance.
The study on the photocatalytic performance and mechanism demonstrated that the specific surface areas and the backbone structures of the polymers had a great influence on the photocatalytic performances. A higher specific surface area and an increased adsorption efficiency for pollutants contributed to the enhanced photocatalytic activity.
The sludge resulting from this process represents the next challenge for the water treatment industry, in particular the minimizing of its volume. This Sludge Dewatering handbook will present the key parameters to take into account in order to optimi-ze sludge treatment with SNF Floerger’s organic polymers.
The bonds between water molecules and these constituents are often significantly different from normal water-water bonds and so this type of water has different physicochemical properties than bulk water e.g., melting point, boiling point, density, compressibility, heat of.
In this review, we systematically review the latest advances of skin‐inspired mechanical sensors, temperature sensors, and humidity sensors. The working mechanisms, key materials, device structures, and performance of various physical sensors are summarized and discussed in cincinnatiblackhistory.com: Shuo Li, Yong Zhang, Yiliang Wang, Kailun Xia, Zhe Yin, Huimin Wang, Mingchao Zhang, Xiaoping Liang.
The free water almost does not interact with the contact medium, while the bound water is an extremely thin layer of water surrounding the medium surfaces, which has a strong attraction between the surfaces and the water molecules, and is much less mobile than the rest of the water in the cincinnatiblackhistory.com by: 3.
The monomer units are organic carbon-based molecules. Beside carbon and physical composition of separate phases from different polymers. Polymer blends Figure Influence of the crystallite size to the melt temperature for PA6 fiber material .
12j 1 Material Properties of Plastics. An increase in porosity of carbon-reinforced plastic does not have any great adverse effect on the mechanical characteristics. This means that only the moisture present in the intermolecular interstices is active in terms of effects on the mechanism of deformation and cincinnatiblackhistory.com by: 2.
grade polystyrene although they are susceptible to water damage [5–7]. Absorbed moisture affects the fracture toughness, the tensile properties and the viscoelastic behaviour of some polymers [13–17]. These mechanical properties are altered if the sorbed moisture: (1) introduces swelling stresses, (2).
Although the organic stabilizers do not give as white a. such as water (in form of moisture, snow, rain, ranking performance of different polymers and.
stabilizers may be done. provide. Plastic polymers have chemical reaction properties similar to those of small molecules, though the polymers themselves are larger in size.
This means that a range of different factors, including thermal conditions, stress cracking, or the diffusion of chemical additives, can alter the molecular plastic polymer structure, and thus the fundamental properties, of most plastic polymer materials.
SYNTHESIS OF IMPROVED MOISTURE RESISTANT POLYMERS. Final Report. Under ContractNAS3-_ A -n in air or nitrogen atmosphere and did not seem to be affected by the presence of various. organic peroxides for either reverse Diels-Alder or addition polymerization.
Next, the "B-staged" Synthesis of Improved Moisture Resistant Polymers. SUMMARY. Water soluble polymers find applications in a number of fields of which the following may be worth mentioning: cosmetics, detergent, oral care, industrial water treatment, g- thermal, wastewater treatment, water purification and reuse, pulp and paper production, sugar refining, and many more.
Oct 24, · The phase change from bound water to steam entrained in the polymer melt (foam) significantly reduced the ignition time compared to dry samples. Attempts were made to account for the moisture-sensitive ignition delay in terms of thermal properties, chemical processes governing ignition, and a numerical pyrolysis cincinnatiblackhistory.com by: Water soluble polymers cover a wide range of markedly different from that of the liquid medium.
Either the particles settle out or they IV Influence of the organic nature of the suspension 17 IV-8 Advantages of synthetic coagulants 17 VWATER SOLUBLE POLYMERS A polymer matrix composite (PMC) is a composite material composed of a variety of short or continuous fibers bound together by an organic polymer matrix.
PMCs are designed to transfer loads between fibers of a matrix. Some of the advantages with PMCs include their lightweight, high stiffness and their high strength along the direction of their reinforcements. Jan 28, · A true moisture analyzer is capable of detecting only water loss by utilizing the RH detector, which can discern the difference between water and other volatile vapors being released from the sample.
Table 2 shows that the sample is losing roughly % of its mass that is not water. Although different in detail, the proposed relationships are all based on the additivity of basic thermophysical properties.
One of the most widely used equation for predicting glass transition temperatures of amorphous mixtures and random copolymers is the Fox equation: (1). Water uptake of hydrophilic polymers determined by a thermal gravimetric analyzer with a controlled humidity chamber Hanneke M.
Thijs,a C. Remzi Becer,a Carlos Guerrero-Sanchez,a David Fournier,a Richard Hoogenbooma and Ulrich S. Schubert*ab Received 6th. of temperature and moisture content on the tensile strength of different composites. SCOPE HE MECHANICAL PROPERTIES of composite materials may suffer when the Tmaterial is exposed to high temperature, humidity environments.
There-fore, in order to utilize the full potential of composite materials, their performance. Mar 10, · Abstract. Studies have been made by a sorption-desorption procedure on the diffusion of water vapor at relative humidities of from 30 to 85% into the polymers, polyvinyl acetate cellulose acetate (% acetyl), cellulose nitrate (% N), 6–10 nylon, and polyvinyl alcohol.
Jan 03, · This study aimed to evaluate the effect of initial moisture content on the in-vessel composting under air pressure of organic fraction of municipal solid waste in Morocco in terms of internal temperature, produced gases quantity, organic matter conversion rate, and Cited by: Polyaniline (PANI) was then coated on the PSMA surface via in situ polymerization, and a three-dimensional (3D) structured reticulate PANI/PSMA composite was, thus, obtained.
The adsorption performance of the composite for organic dyes under different circumstances and the adsorption mechanism were cincinnatiblackhistory.com: Yuanli Liu, Liushuo Song, Linlin Du, Peng Gao, Nuo Liang, Si Wu, Tsuyoshi Minami, Limin Zang, Chuanb.
Silicone resins are polymers comprised of a siloxane (silicon– oxygen) lattice with at least some portion comprised of the silicate (SiO 4/2) or silsesquioxane (R-SiO 3/2) structures, where R represents various alkyl or aryl organic groups (most commonly methyl or phenyl).
In comparison to organic. This paper surveys the literature covering scientific research into the field of polymer latex film formation and properties. This is an important area of research since a large proportion of the commercially produced latex polymers will typically be utilised by being.
High-performance liquid chromatography (HPLC; formerly referred to as high-pressure liquid chromatography) is a technique in analytical chemistry used to separate, identify, and quantify each component in a mixture. It relies on pumps to pass a pressurized liquid solvent containing the sample mixture through a column filled with a solid adsorbent cincinnatiblackhistory.comes: organic molecules, biomolecules, ions, polymers.Jan 16, · The development of an alternative to Karl Fischer moisture analyzer has been achieved, and can be used for moisture specific analysis of medical device grade resins.
The Computrac ® Vapor Pro ® L moisture analyzer successfully uses Relative Humidity sensor technology for selective and accurate moisture cincinnatiblackhistory.com: AMETEK Brookfield.Organic chemistry is a subdiscipline of chemistry that studies the structure, properties and reactions of organic compounds, which contain carbon in covalent bonding.
Study of structure determines their chemical composition and cincinnatiblackhistory.com of properties includes physical and chemical properties, and evaluation of chemical reactivity to understand their behavior.