The study was concerned with the synthesis and characterization of a silsesquioxane-based hybrid nanocomposite with self-assembling properties intended for monumental porous limestone conservation. Radical polymerization of 3-(trimethoxysilyl)propyl methacrylate in the presence of a primary amine surfactant yielded a new type of hybrid nanocomposite, in which silica was dispersed as domains with typical sizes in the nanometer range. The self-assembling

The aim of this study was to synthesize and characterize a hybrid composite based on type I hydrated collagen, hydroxyapatite and a silane precursor (amino-propyltriethoxysilane). Through sol-gel approach of the precursor and noncovalent immobilization of collagen on the surface of hydroxyapatite, a new type of hybrid material was obtained in which microspheres comprising silica and hydroxyapatite particles are dispersed in an oriented fibrous network

The synthesis, characterization and evidence of magnetostrictive properties of blends between one ionic polyurethane with carboxylic units and magnetostrictive micropowders (Fe78Si9B13), as well as nanopowders (Fe68,5Co10Sm1,5B20) is reported. The incorporation of magnetic particles in the polyurethane matrix lead to a magnetic behavior directly dependent on their density and dimensions. The best response was achieved for the micropowders with the

The synthesis, characterization and photochemical properties of a new polyurethane cationomer (PUC–AN) with anthracene chromophore groups attached on the quaternary ammonium units is reported and compared to those of a model compound (AN) carrying the same moiety. PUC–AN synthesis implied the quaternization reaction with 9-chloromethylanthracene of the tertiary amine of one precursor polymer based on poly(tetramethylene oxide) diol of 2000 average

Three new o-hydroxy Schiff bases, 2-chloromethyl-N-(2-hydr oxybenzilidene)aniline, 3-(11-bromoundecanoyloxymethyl)-N-(2-hydroxybenzilidene)aniline and 4-chloromethylphenyl (carbamoyloxymethyl- 2-hydroxybenzylidene)aniline, used as quaternization agents for a polyetherurethane precursor based on poly(tetramethylene oxide) diol of 2000 gmol−1 average molar mass (PTMO), 2,4- toluene diisocyanate and N-methyldiethanolamine (1:3:2 molar ratio), have

A convenient alternative to incorporate carboxylate units on urethane nitrogen atoms through polymer modification of a neutral polyesterurethane with a cyclic monomer, i.e., maleic anhydride, is proposed. The method yields new polyurethane anionomers. Under optimum reaction conditions, polyanions with a degree of substitution corresponding to an ionic content of 30 and 80 meq ionic groups/100 g polymer, respectively, were obtained. These carboxylate

New polymeric photobase generators containing oxime–urethane groups were prepared by the polyaddition reaction of 2,4-tolylene diisocyanate with terephthalaldehyde dioxime in the presence or absence of a polyol component to study the ability of these polymers to generate amines through the photolysis of oxime–urethane linkage. The amines induced the crosslinking of poly(glycidyl methacrylate), as proved by the variation of the amount of the insoluble

Two new bisazomethine diols were prepared from terephthalaldehyde and aromatic or aliphatic aminoalcohols. The structure of the diols with bisazomethine moieties was confirmed by 1H-NMR, IR, UV spectroscopy and elemental analysis. Bisazomethine aliphatic diol exhibited a smectic phase that has been identified by means of polarizing microscopy and differential scanning calorimetry. By using these diols as partners in polyaddition reaction between