Definitions of terms relating to the structure and
... Note 1: A gel has a finite, usually rather small, yield stress. Note 2: A gel can contain (i) a covalent polymer network, e.g., a network formed by crosslinking polymer chains or by nonlinear polymerization; (ii) a polymer network formed through the physical aggregation of polymer chains, caused by ...
... Note 1: A gel has a finite, usually rather small, yield stress. Note 2: A gel can contain (i) a covalent polymer network, e.g., a network formed by crosslinking polymer chains or by nonlinear polymerization; (ii) a polymer network formed through the physical aggregation of polymer chains, caused by ...
Synthesis of PbS Nanoclusters within Block Copolymer Nanoreactors
... Loading the Nanoreactors with Lead. As shown in Scheme 1, the first step in cluster synthesis involves loading the nanoreactors with the metal of interest (lead). Proper choice of the lead-containing reagent is crucial. Loading can be attempted from aqueous solutions of lead salts such as lead chlor ...
... Loading the Nanoreactors with Lead. As shown in Scheme 1, the first step in cluster synthesis involves loading the nanoreactors with the metal of interest (lead). Proper choice of the lead-containing reagent is crucial. Loading can be attempted from aqueous solutions of lead salts such as lead chlor ...
Structure and Properties of Low-Molecular
... simplest way (by the tensile drawing of polymer samples in the presence of AAM). When the sample is removed from AAM, and the low-molecular-mass liquid is allowed to evaporate from the volume of crazes (in this case, the sample is kept either in a free state or under isometric conditions), various c ...
... simplest way (by the tensile drawing of polymer samples in the presence of AAM). When the sample is removed from AAM, and the low-molecular-mass liquid is allowed to evaporate from the volume of crazes (in this case, the sample is kept either in a free state or under isometric conditions), various c ...
33 POLYMERS I OPTIONAL MODULE - 2
... Depending upon the nature of the repeating structural units (monomers), polymers are divided into two broad categories viz., homopolymers and copolymers ...
... Depending upon the nature of the repeating structural units (monomers), polymers are divided into two broad categories viz., homopolymers and copolymers ...
WIPO IPC: Internet Publication
... o Non-metals: H, B, C, Si, N, P, O, S, Se, Te, noble gases, halogens o Metals: elements other than non-metals o Transition elements: elements with atomic numbers 21 to 30 inclusive, 39 to 48 inclusive, 57 to 80 inclusive, 89 upwards Section C covers : o pure chemistry, which covers inorganic compoun ...
... o Non-metals: H, B, C, Si, N, P, O, S, Se, Te, noble gases, halogens o Metals: elements other than non-metals o Transition elements: elements with atomic numbers 21 to 30 inclusive, 39 to 48 inclusive, 57 to 80 inclusive, 89 upwards Section C covers : o pure chemistry, which covers inorganic compoun ...
Template-Directed Synthesis of Structurally Defined Branched
... Here, DNA intercalators can be used to cross-link doublestranded DNA upon UV irradiation, followed by covalent attachment of synthetic polymers.32−34 This strategy produces monodisperse backbone molecular weights via plasmid DNA; however, it similarly lacks precise control over branch density and pl ...
... Here, DNA intercalators can be used to cross-link doublestranded DNA upon UV irradiation, followed by covalent attachment of synthetic polymers.32−34 This strategy produces monodisperse backbone molecular weights via plasmid DNA; however, it similarly lacks precise control over branch density and pl ...
comparison of candidate materials for seasonal storage of solar heat
... Corrosiveness at storage and/or reaction Environmental impact and toxicity of the material 5. Cost of the material (abundance / easy to mine) 6. Number of material components during synthesis reaction 7. Reactor pressure These characteristics are chosen to be (as far as possible) independent of each ...
... Corrosiveness at storage and/or reaction Environmental impact and toxicity of the material 5. Cost of the material (abundance / easy to mine) 6. Number of material components during synthesis reaction 7. Reactor pressure These characteristics are chosen to be (as far as possible) independent of each ...
Tuning the Molecular Properties of Polybenzimidazole by
... mechanical properties and acid-doping level capacity. Therefore, there is a demand for the preparation of high molecular weight PBI and obviously the best way to do that is to synthesize various polymer backbone structures. However, one should not heavily compromise the solubility issue aiming to in ...
... mechanical properties and acid-doping level capacity. Therefore, there is a demand for the preparation of high molecular weight PBI and obviously the best way to do that is to synthesize various polymer backbone structures. However, one should not heavily compromise the solubility issue aiming to in ...
Thermal Decomposition of Polymers - Marcelo Hirschler
... complicated than that of flammable liquids. For most flammable liquids, the gasification process is simply evaporation. The liquid evaporates at a rate required to maintain the equilibrium vapor pressure above the liquid. In the case of polymeric materials, the original material itself is essentiall ...
... complicated than that of flammable liquids. For most flammable liquids, the gasification process is simply evaporation. The liquid evaporates at a rate required to maintain the equilibrium vapor pressure above the liquid. In the case of polymeric materials, the original material itself is essentiall ...
Polyamide from lactams by reactive rotational molding via anionic
... chain initiators and catalysts [3]. It is well known that anionic polymerization of !CL (APCL) occurs faster (i.e., over a few minutes) than classical hydrolytic polymerization, which takes about 12–24 h [4]. A fast polymerization process in addition to good mechanical properties of PA6 results in a ...
... chain initiators and catalysts [3]. It is well known that anionic polymerization of !CL (APCL) occurs faster (i.e., over a few minutes) than classical hydrolytic polymerization, which takes about 12–24 h [4]. A fast polymerization process in addition to good mechanical properties of PA6 results in a ...
Synthetic Polymers
... Initiator – CH2–CH– CH2–CH– CH2–CH–CH2–CH– etc. In this process, some initiator molecule adds to one carbon of the CC double bond of the monomer to generate a reactive site, such as a radical or a carbocation, at the other carbon. This reactive carbon species then adds to another monomer to produce ...
... Initiator – CH2–CH– CH2–CH– CH2–CH–CH2–CH– etc. In this process, some initiator molecule adds to one carbon of the CC double bond of the monomer to generate a reactive site, such as a radical or a carbocation, at the other carbon. This reactive carbon species then adds to another monomer to produce ...
Photo cross-linkable poly(N-isopropylacrylamide) copolymers III: micro-fabricated temperature responsive hydrogels
... E-mail address: [email protected] (D. Kuckling). ...
... E-mail address: [email protected] (D. Kuckling). ...
Chemical reaction model:
... active i.e. there should exist sufficient dipole moment on the functional group to absorb Infra red radiation. Ketones are IR active and absorb radiation at 1718 cm-1. Ketones are determined in terms of Oxidation Index (O.I.), which is defined in terms of the height of the carbonyl peak to the heigh ...
... active i.e. there should exist sufficient dipole moment on the functional group to absorb Infra red radiation. Ketones are IR active and absorb radiation at 1718 cm-1. Ketones are determined in terms of Oxidation Index (O.I.), which is defined in terms of the height of the carbonyl peak to the heigh ...
Ring-Opening Metathesis Polymerization of Norbornene by Cp
... Olefin metathesis reactions are widely used in industry.1 The largest application of this reaction is found in the Shell higher olefin process (SHOP), which produces more than 105 tons of C10-C20 alkenes annually.2 One subset of olefin metathesis reactions is known as ringopening metathesis polymeri ...
... Olefin metathesis reactions are widely used in industry.1 The largest application of this reaction is found in the Shell higher olefin process (SHOP), which produces more than 105 tons of C10-C20 alkenes annually.2 One subset of olefin metathesis reactions is known as ringopening metathesis polymeri ...
Physical Properties of Macromolecules Glass Transitions in Amorphous Polymers
... Inorganic models of transition-metal coordination between d-block salts and functional polymers are introduced and analyzed to explain increases in Tg via coordination crosslinks. d-Electron configurations and stabilization of metal d-electrons due to the surrounding ligands in the first-shell coord ...
... Inorganic models of transition-metal coordination between d-block salts and functional polymers are introduced and analyzed to explain increases in Tg via coordination crosslinks. d-Electron configurations and stabilization of metal d-electrons due to the surrounding ligands in the first-shell coord ...
MS1: Structure of Materials
... Structure factors. Intensities of reflections. X-ray, neutron and electron diffraction. Reciprocal space and the Ewald sphere construction. Powder patterns. Indexing cubic diffraction patterns. Production of X-rays. X-ray tubes. X-ray spectrum. Continuous and characteristic X-rays. X-ray spectromete ...
... Structure factors. Intensities of reflections. X-ray, neutron and electron diffraction. Reciprocal space and the Ewald sphere construction. Powder patterns. Indexing cubic diffraction patterns. Production of X-rays. X-ray tubes. X-ray spectrum. Continuous and characteristic X-rays. X-ray spectromete ...
Polymers
... Natural polymers, such as polysaccharides, cellulose starch proteins, have been parts of every living being since the beginning of life. In addition, there are numerous man-made polymers, which have a wide range of applications. Polymers are made of two Greek words ‘poly’ means many and ‘mers’ means ...
... Natural polymers, such as polysaccharides, cellulose starch proteins, have been parts of every living being since the beginning of life. In addition, there are numerous man-made polymers, which have a wide range of applications. Polymers are made of two Greek words ‘poly’ means many and ‘mers’ means ...
Polymer Electrolytes
... e.g., alkali, alkaline earth ions, Mg2+ (b) soft: larger cations with several valence electrons, Hg2+ 2) hard/soft bases (a) hard: non-polarizable ligands of high electronegativity (-O-) (b) soft: more polarizable groups, e.g., thio group -O- > -NH- > -S- ...
... e.g., alkali, alkaline earth ions, Mg2+ (b) soft: larger cations with several valence electrons, Hg2+ 2) hard/soft bases (a) hard: non-polarizable ligands of high electronegativity (-O-) (b) soft: more polarizable groups, e.g., thio group -O- > -NH- > -S- ...
- Free Documents
... Films extremely interesting as model systems to investigate finite size effects on liquids without any interaction with substrates. the inplane correlation function and cross correlations between the surfaces. The correlation functions Cx. Sketch of a thin free standing polymer with model surfaces r ...
... Films extremely interesting as model systems to investigate finite size effects on liquids without any interaction with substrates. the inplane correlation function and cross correlations between the surfaces. The correlation functions Cx. Sketch of a thin free standing polymer with model surfaces r ...
Course Description Word File
... Design for Polymer Analysis Yr. : 3 Sem. : 2 Course Code: GC1022 To increase the design ability of polymer materials by studying the fundamentals of polymer materials and characterization, by selecting polymer materials, which can be found in our living environment and industries, and performing tea ...
... Design for Polymer Analysis Yr. : 3 Sem. : 2 Course Code: GC1022 To increase the design ability of polymer materials by studying the fundamentals of polymer materials and characterization, by selecting polymer materials, which can be found in our living environment and industries, and performing tea ...
Properties_problems 5
... saturated liquid to the ideal gas state at infinite dilution and Vi is the molar volume of the liquid. The solubility parameter of a polymer has to be determined indirectly or calculated by group-contribution methods. Calculation of by a group-contribution method requires the value of a molar att ...
... saturated liquid to the ideal gas state at infinite dilution and Vi is the molar volume of the liquid. The solubility parameter of a polymer has to be determined indirectly or calculated by group-contribution methods. Calculation of by a group-contribution method requires the value of a molar att ...
... the structure, causing the doping reaction to proceed backwards or forwards. In this way the conductivity can be switched off or on. Processing polyacetylene and many other polymers such as polypyrrole and polythiophene was for a time ruled out because of their failure to melt or to dissolve in any ...
File - Mr Weng`s IB Chemistry
... A catalyst increases the rate of a reaction without being used up in the reaction. It does this by lowering the activation energy of the reaction either by making the activated complex more stable, or by the creation of reaction intermediates. The area where these interactions take place is called t ...
... A catalyst increases the rate of a reaction without being used up in the reaction. It does this by lowering the activation energy of the reaction either by making the activated complex more stable, or by the creation of reaction intermediates. The area where these interactions take place is called t ...
EXPERIMENT 28 Intrinsic Viscosity: Chain Linkage in Polyvinyl
... solution up to the mark with distilled water and mix by slowly inverting a few times. If the solution appears contaminated with insoluble material that would possibly interfere with the viscosity measurements, filter it through Pyrex wool. (Since making up this solution may take considerable time, i ...
... solution up to the mark with distilled water and mix by slowly inverting a few times. If the solution appears contaminated with insoluble material that would possibly interfere with the viscosity measurements, filter it through Pyrex wool. (Since making up this solution may take considerable time, i ...
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.