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... characteristics of two different materials to achieve physical and/or mechanical properties not found with one material alone. One such class of composites exploits the superior mechanical properties of liquid crystalline polymers (LCP) to reinforce another thermoplastic polymer. In practice, howeve ...
... characteristics of two different materials to achieve physical and/or mechanical properties not found with one material alone. One such class of composites exploits the superior mechanical properties of liquid crystalline polymers (LCP) to reinforce another thermoplastic polymer. In practice, howeve ...
Corrosion of Ceramic and Composite Materials, Second Edition
... liquid phase sintering (also crystal growth studies) and the dissolution of various raw materials in molten glass in the manufacture of glass products. The proper selection of materials and good design practices can greatly reduce the cost caused by corrosion. To make the proper selection, engineers ...
... liquid phase sintering (also crystal growth studies) and the dissolution of various raw materials in molten glass in the manufacture of glass products. The proper selection of materials and good design practices can greatly reduce the cost caused by corrosion. To make the proper selection, engineers ...
Study on Alginate–Chitosan Complex Formed with Different
... Furthermore, exemplary thermal decomposition curves of sodium alginate–chitosan complexed samples (ACH-1 and ACH-9) are presented in Figure 1. The obtained results showed that a pure sodium alginate sample undergoes a two-stage thermal degradation process, while chitosan and polyion blends are degra ...
... Furthermore, exemplary thermal decomposition curves of sodium alginate–chitosan complexed samples (ACH-1 and ACH-9) are presented in Figure 1. The obtained results showed that a pure sodium alginate sample undergoes a two-stage thermal degradation process, while chitosan and polyion blends are degra ...
Modification of Polycaprolactone by Titania Through a Sol
... inorganic phase 2. Examples of organic polymers used in the sol-gel process include elastomers, glassy polymers, semicrystalline polymers, and membranes of perfluorosulfonic acid (Naflan®) 3. Ceramic precursors are usually organometallic compounds (M[OCnH2n+1]z, where M = Si, Sn, Ti, Zr, Al, etc.), ...
... inorganic phase 2. Examples of organic polymers used in the sol-gel process include elastomers, glassy polymers, semicrystalline polymers, and membranes of perfluorosulfonic acid (Naflan®) 3. Ceramic precursors are usually organometallic compounds (M[OCnH2n+1]z, where M = Si, Sn, Ti, Zr, Al, etc.), ...
An Optimal Cure Process to Minimize Residual Void and
... Among the defects in LED products, the residual voids of the curing process were a cause of decreasing the LED lamp efficiency. Such residual voids typically occur when the air is mixed during the dispensing or the silicone is abruptly cured due to the mixing of moisture and vaporization of the mois ...
... Among the defects in LED products, the residual voids of the curing process were a cause of decreasing the LED lamp efficiency. Such residual voids typically occur when the air is mixed during the dispensing or the silicone is abruptly cured due to the mixing of moisture and vaporization of the mois ...
Inorganic Polymers, Second Edition
... Polymer chemistry and technology form one of the major areas of molecular and materials science. This field impinges on nearly every aspect of modern life, from electronics technology, to medicine, to the wide range of fibers, films, elastomers, and structural materials on which everyone depends. Most ...
... Polymer chemistry and technology form one of the major areas of molecular and materials science. This field impinges on nearly every aspect of modern life, from electronics technology, to medicine, to the wide range of fibers, films, elastomers, and structural materials on which everyone depends. Most ...
Synthesis and thermal decarbonylation of W(CO)5 complexes
... loss between 300 and 800 C. It was clearly noted that the weight loss produced by further heating the complexes for 1/2 h at 800 C were almost negligible, while the free polymeric ligands underwent another weight loss of the order of 7%. Therefore, unlike the precursor ligand, the residues left by ...
... loss between 300 and 800 C. It was clearly noted that the weight loss produced by further heating the complexes for 1/2 h at 800 C were almost negligible, while the free polymeric ligands underwent another weight loss of the order of 7%. Therefore, unlike the precursor ligand, the residues left by ...
Organic Reactions in Organised Media
... One of the basic requirements for every reaction is attaining proper contact between reactants. Insufficient contact between reactants will prevent the reaction from running efficiently. This is almost always the case when immiscible hydrophilic and hydrophobic reagents are involved in the process. ...
... One of the basic requirements for every reaction is attaining proper contact between reactants. Insufficient contact between reactants will prevent the reaction from running efficiently. This is almost always the case when immiscible hydrophilic and hydrophobic reagents are involved in the process. ...
EFFECT OF LEWIS ACID IN TiCl4/MgCl2/THF/AlCl3 CATALYST
... polymerization. Experimentally, metal chlorides (CaCl2, FeCl2 and ZnCl2) as Lewis acidwere simultaneously introduced in TiCl4/MgCl2/THF/AlCl3 catalyst system. ICP analysis was used to determine the total amount of each metal in the catalyst. For polymerization reaction, TEA was used as cocatalyst an ...
... polymerization. Experimentally, metal chlorides (CaCl2, FeCl2 and ZnCl2) as Lewis acidwere simultaneously introduced in TiCl4/MgCl2/THF/AlCl3 catalyst system. ICP analysis was used to determine the total amount of each metal in the catalyst. For polymerization reaction, TEA was used as cocatalyst an ...
Microporous polymer beads for chemical
... the discovery of a second group of nerve agents known as the V-series. Nerve agents have had a dominant role among chemical warfare agents since WWII, and are considered as the most potent chemical warfare agents ever developed. Due to the high toxicity of organophosphorus nerve agents, much researc ...
... the discovery of a second group of nerve agents known as the V-series. Nerve agents have had a dominant role among chemical warfare agents since WWII, and are considered as the most potent chemical warfare agents ever developed. Due to the high toxicity of organophosphorus nerve agents, much researc ...
Polyimides for piezoelectric materials, magnetoelectric
... properties of the repeating unit with two nitrile groups was studied, observing that a progressive increase in the content of the component with two nitrile groups (2CN) in the film improves the piezoelectric response. High thermal stability of polymer films was demonstrated by means of DSC and TGA, ...
... properties of the repeating unit with two nitrile groups was studied, observing that a progressive increase in the content of the component with two nitrile groups (2CN) in the film improves the piezoelectric response. High thermal stability of polymer films was demonstrated by means of DSC and TGA, ...
Prohibited and Restricted Materials
... Cummins has some global customers who request certain of our products be compliant worldwide. Lead content in certain components such as bearings is the only material in our products on the ELV list. The intent of CORP 00-08-01-01and CES 10908 is to voluntarily transition our products to lead-free b ...
... Cummins has some global customers who request certain of our products be compliant worldwide. Lead content in certain components such as bearings is the only material in our products on the ELV list. The intent of CORP 00-08-01-01and CES 10908 is to voluntarily transition our products to lead-free b ...
Design of Thermoresponsive Polymers with
... materials.5,6 Their ability to change abruptly and reversibly between hydrophobic globular and hydrophilic coil states can be triggered not only by subtle temperature changes but also, in specifically engineered multiresponsive copolymers,7 at constant temperature8 through a range of other stimuli in ...
... materials.5,6 Their ability to change abruptly and reversibly between hydrophobic globular and hydrophilic coil states can be triggered not only by subtle temperature changes but also, in specifically engineered multiresponsive copolymers,7 at constant temperature8 through a range of other stimuli in ...
Modified ketone resin as an epoxy resin curing agent
... The C, H and N contents of all the HCHF resins were estimated by the means of TF 1101 flash elemental analyzer (Italy). The bromine content of BCHF polymer was estimated by Carius method [10]. The IR spectra of all the polymer sample were taken in KBr pellet on “Perkin Elmer model No. spectrum one”. ...
... The C, H and N contents of all the HCHF resins were estimated by the means of TF 1101 flash elemental analyzer (Italy). The bromine content of BCHF polymer was estimated by Carius method [10]. The IR spectra of all the polymer sample were taken in KBr pellet on “Perkin Elmer model No. spectrum one”. ...
Surface and sub-surface reactions during low temperature
... polyamide-6 results in rapid precursor diffusion and significant reaction observed by IR, and the extent of reaction is consistent with results from in situ quartz crystal microgravimetry and transmission electron microscopy. Reacting trimethylaluminium with polyamide-6 leads to methyl group inserti ...
... polyamide-6 results in rapid precursor diffusion and significant reaction observed by IR, and the extent of reaction is consistent with results from in situ quartz crystal microgravimetry and transmission electron microscopy. Reacting trimethylaluminium with polyamide-6 leads to methyl group inserti ...
Synthesis and Characterization of Amorphous and Hybrid Materials
... Fig. 5. Relative silane concentration versus time during acid- and base-catalyzed hydrolysis of different silanes in ethanol (volume ratio to EtOH=1:1). ●: (CH3)3SiOC2H5. ∇:(CH3)2Si(OC2H5)2. □: (CH3)2Si(OC2H5)3. ○:Si(OC2H5)4. ∆:Si(OCH3)4. (Shih et al., 1987) From the standpoint of organically modifi ...
... Fig. 5. Relative silane concentration versus time during acid- and base-catalyzed hydrolysis of different silanes in ethanol (volume ratio to EtOH=1:1). ●: (CH3)3SiOC2H5. ∇:(CH3)2Si(OC2H5)2. □: (CH3)2Si(OC2H5)3. ○:Si(OC2H5)4. ∆:Si(OCH3)4. (Shih et al., 1987) From the standpoint of organically modifi ...
1 Introduction to Hybrid Materials
... power of hybrid materials to generate complex systems from simpler building blocks in a kind of LEGO © approach. Probably the most intriguing property of hybrid materials that makes this material class interesting for many applications is their processing. Contrary to pure solid state inorganic mate ...
... power of hybrid materials to generate complex systems from simpler building blocks in a kind of LEGO © approach. Probably the most intriguing property of hybrid materials that makes this material class interesting for many applications is their processing. Contrary to pure solid state inorganic mate ...
Granta Design • CES Edupack 2009 • Durability - CORE
... ions back onto the metal surface, stifling further dissociation. At this point the iron has a potential (relative to a standard, the hydrogen standard) of −0.44 volts. Each metal has its own characteristic corrosion potential (called the standard reduction potential), as plotted in Figure 2. If two ...
... ions back onto the metal surface, stifling further dissociation. At this point the iron has a potential (relative to a standard, the hydrogen standard) of −0.44 volts. Each metal has its own characteristic corrosion potential (called the standard reduction potential), as plotted in Figure 2. If two ...
Toward Greener Chemistry Methods for Preparation of
... Recent technological advances and the need for materials with new functionalities and bet‐ ter performance have generated an enormous demand for novel materials. Nanostructures such as carbon nanotubes (CNTs) possess outstanding mechanical, electrical, thermal and chemical properties which make them ...
... Recent technological advances and the need for materials with new functionalities and bet‐ ter performance have generated an enormous demand for novel materials. Nanostructures such as carbon nanotubes (CNTs) possess outstanding mechanical, electrical, thermal and chemical properties which make them ...
A Review of using Spray Pyrolysis through Sol-gel
... Received 3 July 2015, revised 30 March 2016, accepted 30 March 2016. ...
... Received 3 July 2015, revised 30 March 2016, accepted 30 March 2016. ...
Materials - Hodder Education
... grain sizes. Some categories of materials are not based on bonding. A particular microstructure identifies composites made of different materials in intimate contact, for example fibreglass and wood, to achieve certain properties. Biomaterials can be any type of material that is biocompatible and us ...
... grain sizes. Some categories of materials are not based on bonding. A particular microstructure identifies composites made of different materials in intimate contact, for example fibreglass and wood, to achieve certain properties. Biomaterials can be any type of material that is biocompatible and us ...
Physical Chemistry of Polymers: Entropy
... or chain transfer steps occur. If a fixed number of chains are initiated at t ) 0, random addition of monomers to the growing chains leads to a Poisson distribution of chain length, with a polydispersity (Mw/Mn) that approaches unity in the high N limit. Block copolymers can be made by sequential ad ...
... or chain transfer steps occur. If a fixed number of chains are initiated at t ) 0, random addition of monomers to the growing chains leads to a Poisson distribution of chain length, with a polydispersity (Mw/Mn) that approaches unity in the high N limit. Block copolymers can be made by sequential ad ...
Oxidation of benzoin with anchored vanadyl and
... for a longer time (up to 32 h). Experiments were carried out using (i) the organic polymer without ligand and metal complex and (ii) the organic polymer functionalised with only the ligand. It was observed that neither of the above catalysed the oxidation of benzoin. However, alumina did catalyse th ...
... for a longer time (up to 32 h). Experiments were carried out using (i) the organic polymer without ligand and metal complex and (ii) the organic polymer functionalised with only the ligand. It was observed that neither of the above catalysed the oxidation of benzoin. However, alumina did catalyse th ...
Controlling monomer-sequence using supramolecular
... This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. ...
... This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. ...
Self-healing material
Self-healing materials are a class of smart materials that have the structurally incorporated ability to repair damage caused by mechanical usage over time. The inspiration comes from biological systems, which have the ability to heal after being wounded. Initiation of cracks and other types of damage on a microscopic level has been shown to change thermal, electrical, and acoustical properties, and eventually lead to wholescale failure of the material. Usually, cracks are mended by hand, which is unsatisfactory because cracks are often hard to detect. A material that can intrinsically correct damage caused by normal usage could lower costs of a number of different industrial processes through longer part lifetime, reduction of inefficiency over time caused by degradation, as well as prevent costs incurred by material failure. For a material to be strictly defined as self-healing, it is necessary that the healing process occurs without human intervention. Some examples shown below, however, include healing polymers that require intervention to initiate the healing process.