caa a22 4500 463192168 CHVBK 20180406164912.0 cr unu---uuuuu 170326e20070101xx s 000 0 eng 10.1007/s10973-006-7814-9 doi (NATIONALLICENCE)springer-10.1007/s10973-006-7814-9 Laponiteclay in homopolymer and tri-block copolymer matrices [Elektronische Daten] Thermal and structural investigations [R. De Lisi, G. Lazzara, S. Milioto, N. Muratore] Macromolecule/laponite nanomaterials were studied by DSC and X-ray diffraction techniques. The matrices are poly(ethylene) glycols at various molecular masses and poly(ethylene oxides)-poly(propylene oxides)-poly(ethylene oxides) tri-block copolymers. The latter were tuned by modulating the molecular masses, at constant hydrophilic/hydrophobic ratio, and the hydrophilicity. For all the investigated systems, the enthalpy of melting (ΔH m) is nearly constant up to a given composition thereafter it increases monotonically reaching the value of the pure macromolecule. We proposed a model to interpret the DSC data. Briefly, it was invoked a mechanism of interaction following which some segments of the adsorbed macromolecule are anchored to the laponite (RD) particles and the remaining segments are radiating away from the surface. The portion of the macromolecule in contact with RD does not contribute to ΔH m whereas that radiating away from the clay does. Once that the RD surface is saturated, the excess of the macromolecule behaves like the pure one. The proposed model allowed to compute successfully the ΔH m values. The X-ray diffraction experiments ruled out the polymer intercalation between the silicate sheets. Springer-Verlag, 2007 dispersion in polymer matrices nationallicence DSC nationallicence laponite nationallicence poly(ethylene)glycols nationallicence poly(ethylene oxide)poly(propylene oxide)poly(ethylene oxide) nationallicence X-ray diffraction nationallicence De Lisi R. Dipartimento di Chimica Fisica ‘F. Accascina', Università degli Studi di Palermo, Viale delle Scienze, Parco D'Orleans II, 90128, Palermo, Italy aut Lazzara G. Dipartimento di Chimica Fisica ‘F. Accascina', Università degli Studi di Palermo, Viale delle Scienze, Parco D'Orleans II, 90128, Palermo, Italy aut Milioto S. Dipartimento di Chimica Fisica ‘F. Accascina', Università degli Studi di Palermo, Viale delle Scienze, Parco D'Orleans II, 90128, Palermo, Italy aut Muratore N. Dipartimento di Chimica Fisica ‘F. Accascina', Università degli Studi di Palermo, Viale delle Scienze, Parco D'Orleans II, 90128, Palermo, Italy aut Journal of Thermal Analysis and Calorimetry Kluwer Academic Publishers 87/1(2007-01-01), 61-67 1388-6150 87:1<61 2007 87 10973 https://doi.org/10.1007/s10973-006-7814-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10973-006-7814-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- De Lisi R. Dipartimento di Chimica Fisica ‘F. Accascina', Università degli Studi di Palermo, Viale delle Scienze, Parco D'Orleans II, 90128, Palermo, Italy aut NATIONALLICENCE 700 1- Lazzara G. Dipartimento di Chimica Fisica ‘F. Accascina', Università degli Studi di Palermo, Viale delle Scienze, Parco D'Orleans II, 90128, Palermo, Italy aut NATIONALLICENCE 700 1- Milioto S. Dipartimento di Chimica Fisica ‘F. Accascina', Università degli Studi di Palermo, Viale delle Scienze, Parco D'Orleans II, 90128, Palermo, Italy aut NATIONALLICENCE 700 1- Muratore N. Dipartimento di Chimica Fisica ‘F. Accascina', Università degli Studi di Palermo, Viale delle Scienze, Parco D'Orleans II, 90128, Palermo, Italy aut NATIONALLICENCE 773 0- Journal of Thermal Analysis and Calorimetry Kluwer Academic Publishers 87/1(2007-01-01), 61-67 1388-6150 87:1<61 2007 87 10973 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer