E V 85 .3 = - The Electrochemical Society
... PTMA is obtained by the polymerization of 2,2,6,6-tetramethylpiperidine methacrylate, a material known as a light stabilizer, followed by the oxidation reaction of the precursor polymer. PTMA is also prepared by the anionic polymerization of the radical monomer, 4-methacryloyl2,2,6,6-tetramethylpipe ...
... PTMA is obtained by the polymerization of 2,2,6,6-tetramethylpiperidine methacrylate, a material known as a light stabilizer, followed by the oxidation reaction of the precursor polymer. PTMA is also prepared by the anionic polymerization of the radical monomer, 4-methacryloyl2,2,6,6-tetramethylpipe ...
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 ...
Induced nanoscale deformations in polymers using atomic
... raised nanostructures inside the cylinder of radius comparable or less the tip radius (20– 40 nm radius).16 The results of the tensile stress (or electrostatic pressure) calculation 共T⬜兲 as a function of distance x for three different tip shapes are seen in Figs. 3(a) and 3(b). It is shown that as t ...
... raised nanostructures inside the cylinder of radius comparable or less the tip radius (20– 40 nm radius).16 The results of the tensile stress (or electrostatic pressure) calculation 共T⬜兲 as a function of distance x for three different tip shapes are seen in Figs. 3(a) and 3(b). It is shown that as t ...
Plastic nanocomposite insulation material enabling reliable
... Detailed description of the task of different partners: Fumed SiO2 nanoparticles that are smaller than 20 nm will be mixed into PP based thermoplastic polymer so that no larger than 80 nm agglomerates are formed up to 5 mass% filler concentration. The production batches will be up to 2000-5000 kg fo ...
... Detailed description of the task of different partners: Fumed SiO2 nanoparticles that are smaller than 20 nm will be mixed into PP based thermoplastic polymer so that no larger than 80 nm agglomerates are formed up to 5 mass% filler concentration. The production batches will be up to 2000-5000 kg fo ...
Chemical reaction model:
... 2.1 Previous Experimental Studies: 2.1.1 Structure and Chemical Properties: ...
... 2.1 Previous Experimental Studies: 2.1.1 Structure and Chemical Properties: ...
Polymer
A polymer (/ˈpɒlɨmər/) (Greek poly-, ""many"" + -mer, ""parts"") is a large molecule, or macromolecule, composed of many repeated subunits. Because of their broad range of properties, both synthetic and natural polymers play an essential and ubiquitous role in everyday life. Polymers range from familiar synthetic plastics such as polystyrene to natural biopolymers such as DNA and proteins that are fundamental to biological structure and function. Polymers, both natural and synthetic, are created via polymerization of many small molecules, known as monomers. Their consequently large molecular mass relative to small molecule compounds produces unique physical properties, including toughness, viscoelasticity, and a tendency to form glasses and semicrystalline structures rather than crystals.The term ""polymer"" derives from the ancient Greek word πολύς (polus, meaning ""many, much"") and μέρος (meros, meaning ""parts""), and refers to a molecule whose structure is composed of multiple repeating units, from which originates a characteristic of high relative molecular mass and attendant properties. The units composing polymers derive, actually or conceptually, from molecules of low relative molecular mass. The term was coined in 1833 by Jöns Jacob Berzelius, though with a definition distinct from the modern IUPAC definition. The modern concept of polymers as covalently bonded macromolecular structures was proposed in 1920 by Hermann Staudinger, who spent the next decade finding experimental evidence for this hypothesis.Polymers are studied in the fields of biophysics and macromolecular science, and polymer science (which includes polymer chemistry and polymer physics). Historically, products arising from the linkage of repeating units by covalent chemical bonds have been the primary focus of polymer science; emerging important areas of the science now focus on non-covalent links. Polyisoprene of latex rubber and the polystyrene of styrofoam are examples of polymeric natural/biological and synthetic polymers, respectively. In biological contexts, essentially all biological macromolecules—i.e., proteins (polyamides), nucleic acids (polynucleotides), and polysaccharides—are purely polymeric, or are composed in large part of polymeric components—e.g., isoprenylated/lipid-modified glycoproteins, where small lipidic molecule and oligosaccharide modifications occur on the polyamide backbone of the protein.The simplest theoretical models for polymers are ideal chains.