New HDPE/MCM41 nanocomposites with improved mechanical performance: synthesis and characterizatio

• Autor(a) principal: Bento, A.
• Data de Publicação: 2011
• Outros Autores: Lourenço, J. P., Fernandes, A., Pérez, Ernesto, Cerrada, María L., Ribeiro, M. R.
• Idioma: eng
• Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
• Texto Completo: http://hdl.handle.net/10400.1/1254
• topic: Ethylene polimerisation; MCM-41; Zirconocene; Supported catalyst

Ordered mesoporous silicas with a channel structure of well-defined geometries and dimensions at nanometer scale are excellent candidates to host intercalation reactions. In recent years, our research group has shown that mesoporous silicas of the M41S class combined with metallocene complexes give rise to excellent supported catalysts for ethylene polymerisation. Due to the support characteristics, the reaction is allowed to occur in the channels and in this way hybrid organic-inorganic materials can be prepared within a large range of nanofiller concentration. These HDPE/MCM-41 nanocomposites exhibit an improved mechanical performance and an easier degradability due to the additional role of MCM-41 as a promoter for PE degradation.