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  • synthesis
  • A diazidated malonate derivative was employed as a monomer for the reagent-free one-pot synthesis of several polyamides containing geminal diazido moieties within the polymer backbone. (rsc.org)
  • The course aims at providing students a comprehensive knowledge of Science and Technology of (natural or synthetic) polymers: from their synthesis, to their processing procedures and techniques, their macroscopic and microscopic properties and characteristics in both solid and liquid states, their durability and their final disposal. (unisalento.it)
  • ASL benefits from and contributes to the state-of-the-art facilities of the Materials Synthesis and Physical Chemistry Group at TPCI. (eie.gr)
  • A method is disclosed for the de novo synthesis of polypeptide-containing polymers. (patentgenius.com)
  • This disclosure also includes a description of, and a method for the preparation of, a class of polymerizable compounds used in the synthesis of polypeptide-containing polymers. (patentgenius.com)
  • The present invention relates to compounds and methods used for the de novo synthesis of organic polymers that contain polypeptides as an integral part of their backbone structure. (patentgenius.com)
  • Some of the other methods include: microwave heating, high-throughput synthesis (synthesis of polymers in parallel), ring opening polymerization (removal of cyclic monomers), interfacial condensation (high temperature reaction of two monomers), dehydrative coupling agents (removing the water group from two carboxyl groups), and solution polymerization (reacting in a solution). (wikipedia.org)
  • The development of controlled radical polymerization as a synthetic methodology in the 1990s allowed for increased study of the concepts and properties of gradient copolymers because the synthesis of this group of novel polymers was now straightforward. (wikipedia.org)
  • Adsorption
  • However, discontinuous transition could be observed on isotherms in the second region if there is a transformation of isotherm types, such as adsorption on mesoporous silica gel. (wikipedia.org)
  • The removal of agaropeptin in agarose substantially reduce the EEO, as well as reducing the non-specific adsorption of biomolecules to the gel matrix. (wikipedia.org)
  • Since 1935, ion exchange chromatography rapidly manifested into one of the most heavily leveraged techniques, with its principles often being applied to majority of fields of chemistry, including distillation, adsorption, and filtration. (wikipedia.org)
  • solvent
  • Other desirable properties of the gel forming agent are the absence of ionizing groups and, in a given solvent, low affinity for the substances to be separated. (wikipedia.org)
  • The eluent (mobile phase) should be a good solvent for the polymer, should permit high detector response from the polymer and should wet the packing surface. (wikipedia.org)
  • The values of the Mark-Houwink parameters, a {\displaystyle a} and K {\displaystyle K} , depend on the particular polymer-solvent system. (wikipedia.org)
  • The quantity a in the expression for the viscosity average molar mass varies from 0.5 to 0.8 and depends on the interaction between solvent and polymer in a dilute solution. (wikipedia.org)
  • The addition of functional groups to the arms of star-shaped polymers as well as selective solvent choice can affect their aggregation properties. (wikipedia.org)
  • Miktoarm polymers have been shown to aggregate into particularly interesting supramolecular formations such as stars, segmented ribbons, and core-shell-corona micellar assemblies depending on their arms' solubility in solution, which can be affected by changes in temperature, pH, solvent, etc. (wikipedia.org)
  • Certain Miktoarm star-block polymers have been shown to stabilize water-organic solvent emulsions, while others have demonstrated the ability to increase the solubility of inorganic salts in organic solutions. (wikipedia.org)
  • Supercritical carbon dioxide can saturate the polymer with solvent. (wikipedia.org)
  • macromolecules
  • The size-distribution characteristics of the macromolecules of the polymer-colloid complexes were determined by photon correlation spectroscopy. (deepdyve.com)
  • It has been applied to the analysis of biomolecules (biopolymers such as DNA, proteins, peptides and sugars) and large organic molecules (such as polymers, dendrimers and other macromolecules), which tend to be fragile and fragment when ionized by more conventional ionization methods. (wikipedia.org)
  • In 2002, the Nobel Prize in Chemistry was awarded to John Bennett Fenn for the development of electrospray ionization (ESI) and Koichi Tanaka for the development of soft laser desorption (SLD) and their application to the ionization of biological macromolecules, especially proteins. (wikipedia.org)
  • melt
  • In addition, star-shaped polymers exhibit lower melt temperatures, lower crystallization temperatures and lower degrees of crystallinity than comparable linear analogues. (wikipedia.org)
  • A small amount of gradient copolymer (i.e.styrene/4-hydroxystyrene) is added to a polymer blend (i.e. polystyrene/polycaprolactone) during melt processing. (wikipedia.org)
  • degradation
  • Publication date: Available online 9 November 2018Source: Polymer Degradation and StabilityAuthor(s): Heather Simmons, Marianna KontopoulouAbstractReactive extrusion using dicumyl peroxide (DCP) and a tri-functional coagent, triallyl trimesate (TAM) is implemented to introduce long-chain branching (LCB) in poly(lactic acid) (PLA). (medworm.com)
  • Publication date: Available online 9 November 2018Source: Polymer Degradation and StabilityAuthor(s): Mhd Abd Cader Mhd Haniffa, Yern Chee Ching, Cheng Hock Chuah, Kuan Yong Ching, Liou Nai-ShangAbstractZnO and corundum (α-Al2O3) nanoparticles were successfully synthesized by aqueous precipitation and sintering techniques respectively. (medworm.com)
  • After removal of a cancerous brain tumor, the wafer is inserted into the brain releasing a chemotherapy agent at a controlled rate proportional to the degradation rate of the polymer. (wikipedia.org)
  • In dilute aqueous solution, such as is commonly used for Enhanced Oil Recovery applications, polyacrylamide polymers are susceptible to chemical, thermal, and mechanical degradation. (wikipedia.org)
  • specific polymer
  • 2) Select the appropriate technique and processing conditions for a specific polymer, or a blend of polymers. (unisalento.it)
  • 6) Identify the proper methods and techniques required to characterize a specific polymer, or a blend of polymers, in relation to the specific final use. (unisalento.it)
  • Common commercial approaches to decrease smoke formation in specific polymer systems and for specific applications are also presented. (chemtec.org)
  • intrinsic
  • Also presented is a discussion on why different commercial polymers have different intrinsic tendencies to generate smoke and ways in which smoke generation can be assessed. (chemtec.org)
  • Physical Chemistry
  • Since 1997, the Applied Spectroscopy Lab (ASL) is the dynamic interface between fundamental research activities in Materials Physical Chemistry at TPCI and a broad range of industrial R&D or QC needs. (eie.gr)
  • Physical Chemistry (8 ed. (wikipedia.org)
  • Physical Chemistry (9 ed. (wikipedia.org)
  • Food physical chemistry is considered to be a branch of Food chemistry concerned with the study of both physical and chemical interactions in foods in terms of physical and chemical principles applied to food systems, as well as the applications of physical/chemical techniques and instrumentation for the study of foods. (wikipedia.org)
  • Understanding food processes and the properties of foods requires a knowledge of physical chemistry and how it applies to specific foods and food processes. (wikipedia.org)
  • Food physical chemistry is essential for improving the quality of foods, their stability and food product development. (wikipedia.org)
  • Because food science is a multi-disciplinary field, food physical chemistry is being developed through interactions with other areas of food chemistry and food science, such as: food analytical chemistry, food process engineering/food processing, food and bioprocess technology, food extrusion, food quality control, food packaging, food biotechnology and food microbiology. (wikipedia.org)
  • 2003. Physical Chemistry Of Foods. (wikipedia.org)
  • Marcel Dekker, Inc.: New York, 873 pages Physical Chemistry Of Food Processes: Fundamental Aspects.1992. (wikipedia.org)
  • composition
  • Some of the most interesting characteristics exhibited by star-shaped polymers are their unique rheological and dynamic properties compared to linear analogues of identical molecular weight and monomer composition. (wikipedia.org)
  • In the gradient copolymer, there is a continuous change in monomer composition along the polymer chain (see Figure 2). (wikipedia.org)
  • Generally the composition has a narrow polydispersity index (PDI) and the molecular weight increases with time as the polymer forms. (wikipedia.org)
  • reaction
  • Understanding critical polymer reaction parameters can lead to precise control of multi-step polymerizations, real-time residual monomer measurements, and ultimately improved end-use polymer properties. (mt.com)
  • In the arm-first (also known as the "arm-in" or convergent approach) method, monofunctional living polymers with known characteristics are used as precursors in the reaction. (wikipedia.org)
  • thermoplastic
  • 1) Recognize the main differences, characteristics and features of the three classes of polymers, i.e. thermosetting, thermoplastic and elastomers. (unisalento.it)
  • reactions
  • These latter polymers are typically formed by adding monomer segments together via free radical addition processes or through linking the segments together by condensation reactions that produce the polymer along with water or another small molecule. (mt.com)
  • pore
  • For polymer separations the pore sizes should be on the order of the polymers being analyzed. (wikipedia.org)
  • Our full range of standardized silica gels are available as granular (premium, standard, and economy grade) and spherical shapes with pore diameters ranging from 60Å to 2000Å, particle sizes from 3μm to 500μm, and bonded phases from C18 to SAX. (sorbtech.com)
  • polypeptides
  • Polymers that exist in nature, such as polypeptides and polysaccharides, are critical components of living organisms. (mt.com)