Articulo
Optimization of processing parameters for the synthesis of low-density polyethylene/organically modified montmorillonite nanocomposites using x-ray diffraction with experimental design
POLYMER INTERNATIONAL;
Polym. Int.
Registro en:
0
D10I1234
D10I1234
WOS:000316632200003
0959-8103
Autor
Campos-Requena, Victor H.
Rivas-Quiroz, Bernabe Luis
Perez-Rivera, Monica de Los Angeles
Contreras, David
Munoz, Eduardo
Institución
Resumen
The influence of the processing parameters on the synthesis of low-density polyethylene (LDPE)/organically modified montmorillonite (OMM) nanocomposite films was studied using experimental design. Intercalation in the nanocomposites was analysed using X-ray diffraction and verified using atomic force microscopy. Four direct melt processing parameters were studied to obtain surface maps of intercalation in the nanocomposites: concentration of OMM (clay-%), concentration of Polybond (R) 3149 (compatibilizer-%), mixing temperature (Tmix) and mixing time. An ANOVA validated the polynomial function, and intercalation maps from response surface methodology (RSM) were obtained. The clay-% parameter had the most significant effect, and Tmix showed no significant effect on intercalation (p<0.05). A strong synergic interaction between clay-% and compatibilizer-% was observed, which is not possible to detect using univariate experiments. RSM provides a powerful tool for choosing the best processing conditions that lead to formulations with the highest intercalations by considering the main factors and their interactions. (c) 2013 Society of Chemical Industry The authors thank FONDEF (grant no. DI0i1234) and CIPA (Centro de Investigacion de Polimeros Avanzados). VHC-R gratefully thanks CONICYT-Chile for its financial support through Doctoral Thesis Support Grant 24110010 and Doctoral Studies in Chile Support Grant 21090205; Red Universitaria Cruz del Sur Grant for financial support of the AFM analysis, and also thanks to Monica Uribe from GEA-UdeC for help with the XRD analysis. 1 FONDEF brivas@udec.cl FONDEF [DI0i1234]; CIPA (Centro de Investigacion de Polimeros Avanzados); CONICYT-Chile [24110010, 21090205]; Red Universitaria Cruz del Sur Grant FONDEF