To access the full text documents, please follow this link: http://hdl.handle.net/2117/12838

Kinetic studies of the degradation of poly (vinyl alcohol)-based proton-conducting membranes at low temperatures
Morancho Llena, José María; Salla Tarragó, José María; Cadenato Matia, Ana María; Fernández Francos, Xavier; Ramis Juan, Xavier; Colomer Vilanova, Pere; Ruiz Mansilla, Rafael; Calventus Solé, Yolanda
Universitat Politècnica de Catalunya. Departament de Màquines i Motors Tèrmics; Universitat Politècnica de Catalunya. CREMIT - Centre de Recerca de Motors i Instal.lacions Tèrmiques; Universitat Politècnica de Catalunya. TERFIQ - Grup de Termodinàmica i Fisico-Química
Thermal decomposition of unmodified poly(vinyl alcohol) (PVA) and poly(vinyl alcohol) crosslinked with sulfosuccinic acid (SSA) membranes has been studied using thermogravimetry (TGA) and ATR Fourier transform infrared spectroscopy (ATR-FTIR). Both types of membranes degrade in a two-step process. However, the introduction of SSA leads to an advance of the decomposition steps at very low temperatures. The reduction in the hydrogen-bond interactions of hydroxyl groups of unmodified PVA because of the presence of SSA crosslinks and the catalytic effect promoted by sulfonic acid group (–SO3H) of SSA can contribute to this different behavior. The kinetics of thermal degradation was investigated by TGA and derivative TGA (DTGA) curves from experiments under non-isothermal conditions at different heating rates. The Friedman isoconversional differential method was used to calculate the activation energy as a function of the reaction weight loss without any previous assumption on the kinetic model. For a representative stage of decomposition, preexponential factor and kinetic model were also obtained. Postcuring isothermal treatments and ATR-FTIR analysis of selected membranes have been used to verify the TGA analysis and add additional information.
Àrees temàtiques de la UPC::Enginyeria química::Química física::Cinètica
Àrees temàtiques de la UPC::Enginyeria química::Química física::Termoquímica
Chemical kinetics
Polyvinyl chloride
Polímers vinílics
Cinètica química
Attribution-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
info:eu-repo/semantics/publishedVersion
Article
         

Show full item record

Related documents

Other documents of the same author

Morancho Llena, José María; Cadenato Matia, Ana María; Ramis Juan, Xavier; Morell, Mireia; Fernández Francos, Xavier; Salla Tarragó, José María; Serra Albet, Àngels
Morancho Llena, José María; Cadenato Matia, Ana María; Ramis Juan, Xavier; Fernández Francos, Xavier; Flores, Marjorie; Salla Tarragó, José María
Morancho Llena, José María; Cadenato Matia, Ana María; Ramis Juan, Xavier; Fernández Francos, Xavier; Salla Tarragó, José María
Morancho Llena, José María; Cadenato Matia, Ana María; Ramis Juan, Xavier; Morell, Mireia; Fernández Francos, Xavier; Salla Tarragó, José María; Serra, Àngels
Salla Tarragó, José María; Cadenato Matia, Ana María; Morancho Llena, José María; Fernández Francos, Xavier; Ramis Juan, Xavier
 

Coordination

 

Supporters