Effect of molecular weight of Polyamide 6 in rheological properties of nanocomposites with Brazilian organoclay

• Autor(a) principal: Leite, Amanda Melissa Damião
• Data de Publicação: 2016
• Outros Autores: Paz, Renê Anisio da, Araújo, Edcleide Maria, Melo, Tomás Jeferson Alves, Pessan, Luiz Antônio, Passsador, Fábio Roebrto
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UFRN
• Texto Completo: https://repositorio.ufrn.br/handle/123456789/44814
• topic: Nanocomposites; Polyamide 6; Organoclay

Polyamide 6 (PA6)/Brazilian organoclay nanocomposites were obtained by melt intercalation and the structural and rheological properties were studied. The nanoclay was treated with quaternary ammonium salt (Cetremide) and characterized using infrared spectroscopy (FTIR) and X-ray diffraction (XRD). The results indicated the effective organophilization of nanoclay. The nanocomposites were obtained by melt intercalation using a twin screw corrotacional extruder in two steps. Firstly, a masterbatch of PA6/nanoclay (1:1) was prepared. In the second step the masterbatch was diluted in PA6 to obtain 3 and 5 wt% of nanoclay in the nanocomposites. The specimens were injection molded and analyzed using capillary rheometry, X-ray diffraction and transmission electron microscopy (TEM). The results of capillary rheometry showed that the presence of the organoclay in PA6 increased the viscosity of the systems. Structural characterization showed that the nanocomposites were predominant in exfoliated structure