Mechanical and Thermal Properties of Linear Low Density Polyethylene/Organoclay Nanocomposites

Autor(es)

Komatsu, Daniel ^[1] ; Paranhos, Caio Marcio ^[2] ; Ruvolo-Filho, Adhemar ^[3]

Afiliação do(s) autor(es)

^[1] Fac Technol Sorocaba, Technol Polymer, BR-18013280 Sorocaba, SP - Brazil

^[2] Univ Fed Sao Carlos, Dept Chem, BR-13565905 Sao Carlos, SP - Brazil

^[3] Univ Fed Sao Carlos, Dept Mat Engn, BR-13565905 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: MATERIALS FOCUS; v. 5, n. 3, p. 209-215, JUN 2016.
• Citações Web of Science: 0

Resumo

Nanocomposites of linear low density polyethylene (LLDPE)/montmorillonite clay were obtained by diluting a masterbatch, containing 20.0% clay, in a twin screw extruder to obtain samples with 1.5% to 10.0% clay. In this study was used the X-ray diffraction (XRD) technique to investigate the structure of montmorillonite clay and was observed that the clay present in the nanocomposites was disorganized. Scanning electron microscopy using a field emission gun (SEM-FEG), and transmission electron microscopy (TEM) showed that there was good distribution and good dispersion of the clay in the polymer matrix, resulting in intercalated and exfoliated structures, respectively. Regarding the mechanical properties, we observed a significant increase in elastic modulus and decrease in toughness for all clay concentrations. With the results from thermogravimetric analysis (TGA) it was observed that the sample with a concentration of 1.5% clay had the highest thermal stability and the sample with 10.0% was the least stable, thus demonstrating that there is a critical concentration of clay in relation to this property. (AU)

• Processo FAPESP: 08/57872-1 - Instituto Nacional de Ciências dos Materiais em Nanotecnologia
• Beneficiário: Elson Longo da Silva
• Linha de fomento: Auxílio à Pesquisa - Temático
• Processo FAPESP: 98/14324-0 - Multidisciplinary Center for Development of Ceramic Materials
• Beneficiário: Elson Longo da Silva
• Linha de fomento: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs