Coating prepared from high molecular

Water-Borne Coatings Prepared from High Molecular Weight Epoxy Resins... 

High molecular weight poly(trimethylene carbonate) PTMC (Mn 300 k g/mol, Mw/Mn 1.46), synthesized, purified, and characterized as described in reference [72] is dissolved in chloroform (3 mg/mL). Thin films are prepared by spin-coating these solutions on cleaned Si wafers at 3,000 rpm (film thickness obtained 25 50 nm). Film thicknesses can be determined by AFM imaging using the scratch method described in Chap. 2 (see also above, hands-on example 47). The enzymatic reaction takes place in situ in the liquid cells filled with lipase solutions (lipase from Thermomyces lanuginosus (EC3.1.1.3, minimum 50,000 units/g purchased from Sigma, U.S.A.) at 37°C for 30 s, 1 min, and 2 min, respectively. 

The polypheny1-as-triazines in this paper are relatively high molecular weight polymers containing 1,2,4-triazines and aromatic nuclei in the main polymer chains, h,, were between 1.39-2.16 dl/g ( 0.5% solution in cresol at 25c ) due to high purity of the two monomers concerned. A yellow, transparent, flexible film was prepared from each of these polymer solutions and varnished wire was obtained by coating the metallic wire... 

Polyurethane coatings have been prepared from silicon-containing hydroxy compounds on the basis of symmetrical bis(hydroxymethyl)decamethylpentasiloxane (200). diphenylsilanediol (200). high molecular weight organosilicon polyols (198) or the type... 

To find out the stabilization effect of polyelectrolytes, silver nanoparticles coated with PAH or PEG at concentrations either 1 mg/ml or 5 mg/ml were examined in 0.5 M NaCl, 0.1 M NaCl or 0.01 M NaCl by UV-Vis spectroscopy. For each type of polyelectrolytes prepared at the concentration of 1 mg/ml independently from their molecular weight and sodium chloride concentration the UV-Vis measurement data revealed most broad absorption bandwidth. The narrow absorption bandwidths were related to both PAH (15 kDa) and PEG (8 kDa) at the same concentration 5 mg/ml in 0.01 M NaCl. Silver nanoparticles modified with 5 mg/ml PAH and 5 mg/ml PEG in 0.1 M NaCl presented narrow absorption widths and relatively high absorbance intensity. Furthermore, PEG coated silver nanoparticles revealed better UV-Vis absorption results among mentioned polyelectrolytes. 

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