Browsing by Author "Retuert de la Torre, Pedro Jaime"

Now showing items 1-11 of 11

    • COCATALYST EFFECT IN POTASSIUM PERSULFATE INITIATED GRAFTING ONTO CHITOSAN 
      Retuert de la Torre, Pedro Jaime; Yazdani-Pedram Zobeiri, Mehrdad (SPRINGER VERLAG, 1993-11)
      Methyl methacrylate and methyl acrylate were grafted onto chitosan by using potassium persulfate alone as redox initiator and in combination with MnCl2 and CuCl2, as inorganic, and both ammonium tartrate and oxalate as ...
    • Compatibilizers based on polypropylene grafted with itaconic acid derivatives. Effect on polypropylene/polyethylene ... 
      Yazdani-Pedram Zobeiri, Mehrdad; Vega, H.; Retuert de la Torre, Pedro Jaime; Quijada Abarca, Juan (SOC PLASTICS ENG INC, 2003-04)
      New types of compatibilizers based on functionalized polypropylene (PP) were synthesized by radical melt grafting either with monomethyl itaconate or dimethyl itaconate. The effect of these new modified PP compounds were ...
    • Effect of monomethyl itaconate-grafted HDPE and EPR on the compatibility and properties of HDPE-EPR blends 
      López Manchado, Miguel; Yazdani-Pedram Zobeiri, Mehrdad; Retuert de la Torre, Pedro Jaime; Quijada Abarca, Juan (JOHN WILEY & SONS INC, 2003-08-22)
      To improve the compatibility and properties of blends based on high-density polyethylene (HDPE) and the ethylene-propylene copolymer (EPR), the functionalization of both through grafting with an itaconic acid derivative, ...
    • Highly porous silica networks derived from gelatin/siloxane hybrids prepared starting from sodium metasilicate 
      Retuert de la Torre, Pedro Jaime; Martínez, Y.; Quijada Abarca, Juan; Yazdani-Pedram Zobeiri, Mehrdad (ELSEVIER SCIENCE BV, 2004-11-01)
      The formation of polymeric hybrid materials of siloxanes with gelatin (GE) starting from sodium metasilicate as the silica source, and their transformation into silica under different conditions have been studied. ...
    • Hybrid ternary organic-inorganic films based on interpolymer complexes and silica 
      Martínez, Y.; Retuert de la Torre, Pedro Jaime; Yazdani-Pedram Zobeiri, Mehrdad; Colfen, H. (ELSEVIER SCI LTD, 2004-05-11)
      Homogeneous transparent hybrid films consisting of chitosan (CHI), poly(monomethyl itaconate) (PMMI) and silica were obtained indicating the absence of microphase separation. These ternary hybrid materials are very interesting ...
    • Hydrogels based on modified chitosan, 1 - Synthesis and swelling behavior of poly(acrylic acid) grafted chitosan 
      Yazdani-Pedram Zobeiri, Mehrdad; Retuert de la Torre, Pedro Jaime; Quijada Abarca, Juan (WILEY-V C H VERLAG GMBH, 2000-06-20)
      A large number of carboxylic groups were introduced onto chitosan by grafting with poly(acrylic acid) as an efficient way of modification. The reactions were carried out in a homogeneous aqueous phase by using potassium ...
    • Porous silica derived from chitosan-containing hybrid composites 
      Retuert de la Torre, Pedro Jaime; Quijada Abarca, Juan; Arias, V.; Yazdani-Pedram Zobeiri, Mehrdad (MATERIALS RESEARCH SOCIETY, 2003-02)
      In this paper, we report the preparation by the sol-gel technique of organic-inorganic hybrid composites containing the biopolymer chitosan incorporated in a siloxane-based inorganic network. The hybrid xerogels were ...
    • Sensing properties of hybrid polymeric films obtained by sol-gel 
      Martínez, Y.; Retuert de la Torre, Pedro Jaime; Yazdani-Pedram Zobeiri, Mehrdad (SOCIEDAD CHILENA DE QUIMICA, 2004-06)
      Hybrid nanocomposites based on siloxane sols, chitosan and poly(monomethyl itaconate) (PMMI) as organic polymer counterparts were prepared. Tetraethyl ortosilicate was used as inorganic network fort-ning reagent that was ...
    • Study of the effect of reaction variables on grafting of polyacrylamide onto chitosan 
      Yazdani-Pedram Zobeiri, Mehrdad; Lagos N., A.; Retuert de la Torre, Pedro Jaime (SPRINGER-VERLAG, 2002-03)
      The biopolymer chitosan was chemically modified by grafting polyacrylamide in a homogeneous aqueous phase by using potassium persulfate as redox initiator system and in the presence of N,N-methylene-bis-acrylamide as a ...
    • Synthesis and unusual swelling behavior of combined cationic/non-ionic hydrogels based on chitosan 
      Yazdani-Pedram Zobeiri, Mehrdad; Tapia Villanueva, Cristián; Retuert de la Torre, Pedro Jaime; Arias, José Luis (WILEY-V C H VERLAG GMBH, 2003-10-15)
      Hydrogel-forming copolymers based on chitosan grafted with different amounts of polyacrylamide were synthesized and its swelling capacity determined in distilled water, sodium chloride solutions, as well as in buffer ...
    • Transparent semiconductor-polymer hybrid films with tunable optical properties 
      Martínez, Y.; Retuert de la Torre, Pedro Jaime; Yazdani-Pedram Zobeiri, Mehrdad; Coelfen, H. (ROYAL SOC CHEMISTRY, 2007)
      Size confined CdS nanoparticles with controlled size and narrow particle size distribution were synthesized in transparent adhesive polyelectrolyte films, which are composed of chitosan (CHI), poly( monomethyl itaconate) ...