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Sheets of branched poly(lactic acid) obtained by one step reactive extrusion calendering process: Melt rheology analysis
(Budapest University of Technology and Economics Department of Polymer Engineering, 2013)
One-step reactive extrusion-calendering process (REX-Calendering) was used in order to obtain sheets of 1mm from two PD,L-LA extrusion grades modified with a styrene-acrylic multifunctional oligomeric agent. In a preliminary ...
Estudio de la relación estructura-propiedades-procesamiento de nanocompuestos basados en poli (ácido láctico) (PLA) y o-MMT
(Universidad de Oriente, 2014)
En este trabajo se investiga la influencia del procesado y del contenido de nanoarcilla en las
propiedades mecánicas de láminas obtenidas por extrusión-calandra a partir de un grado comercial de
PLA y una nanoarcilla ...
Modification of Nafion Membranes with Polyaniline to Reduce Methanol Permeability
(Electrochemical Society, 2015)
The modification of Nafion membranes with polyaniline (PAni) has been studied as an alternative for reducing methanol crossover in direct methanol fuel cells (DMFC). The modification has been performed by directly polymerizing ...
On the use of tris(nonylphenyl) phosphite as a chain extender in melt-blended poly(hydroxybutyrate-co-hydroxyvalerate)/clay nanocomposites: Morphology, thermal stability, and mechanical properties
(© 2015 Wiley Periodicals, Inc., 2015-06)
The influence of the incorporation of tris(nonylphenyl) phosphite (TNPP) as a chain extender on the morphology and thermal stability of poly(hydroxybutyrate-co-hydroxyvalerate) (PHBV)/clay nanocomposites obtained by melt ...
Procesado del ácido poliláctico (PLA) y de nanocompuestos PLA/montmorillonita en planta piloto: Estudio de sus cambios estructurales y de su estabilidad térmica
(Asociación de Químicos e Ingenieros del Instituto Químico de Sarrià, 2010)
Se aplican procesos de transformación y tratamiento de termoplásticos (inyección, extrusión-inyección y recocido) al ácido poliláctico (PLA) y a determinados nanocompues- tos PLA/montmorillonita, con objeto de estudiar las ...
Aplicación de la mecánica de la fractura post-cedencia a polímeros
(Universidad Simón Bolívar, 2010)
The Essential Work of Fracture (EWF) technique has been used for the ductile materials characterization, where
yielding phenomenon occurs before crack propagation. The EWF method characterizes the post-yielding ...
Influence of crystallinity on the fracture toughness of poly(lactic acid)/montmorillonite nanocomposites prepared by twin-screw extrusion.
(© 2010 Wiley Periodicals, 2011-04)
The aim of this work was to study the effect of crystallinity degree on the thermal, mechanical, and fracture properties of poly(lactic acid)/organomodified montmorillonite (PLA/OMMT) nanocomposites. Samples with two ...
Fracture behavior of quenched poly(lactic acid)
(BME-PT, 2011)
The effect of a quenching treatment applied on heated cast sheet extruded films of two poly(lactic acid) (PLA)
commercial grades, with different optical purities, was studied. The thermal and mechanical properties of the ...
Influence of processing on the ethylene-vinyl alcohol (EVOH) properties: Application of the successive self-nucleation and annealing (SSA) technique
(Budapest University of Technology, 2010)
Films of EVOH copolymers, processed three times by twin-screw extrusion were prepared using a cast-film line. The variation on the melt flow rate (MFR) and rheological behaviour of the films were determined, as well as the ...
Processing of poly(lactic acid)/organomontmorillonite nanocomposites: microstructure, thermal stability and kinetics of the thermal decomposition
(Elsevier, 2011-12-15)
The degradation during the melt processing of poly(lactic acid) (PLA) and its nanocomposites with different contents (0.5 and 2.5%) of an organomodified montmorillonite (OMMT) promoted physical and chemical changes in their ...