High density polyethylene - hydroxyapatite composites synthetized by in situ ethylene polymerization

Autores

  • Vanessa Hermán Centro de Química, Laboratorio de Polímeros, Instituto Venezolano de Investigaciones Científicas (IVIC).
  • Arquimedes Karam Centro de Química, Laboratorio de Polímeros, Instituto Venezolano de Investigaciones Científicas (IVIC).
  • Carmen Albano Universidad Central de Venezuela, Facultad de Ingeniería, Escuela de Ingeniería Química
  • Gema González Centro Ing. Materiales y Nanotecnología, Laboratorio de Materiales, IVIC.

Palavras-chave:

Synthesis, polyethylene, Composites, Hydroxiapatite, Thermal degradation

Resumo

A novel synthesis method of obtaining polyethylene - hydroxyapatite (HDPE-HA) composites is proposed using in situ ethylene polymerization, employing Cp2ZrCl2/MAO as catalytic system. In this work, the influence of different polymerization conditions on the HA dispersion was evaluated. The parameters studied were: stirring velocity (600-2000 rpm) and temperature (10-75°C). It was found that, combining high stirring velocities (2000 rpm) and low temperatures (10 °C), it was possible to reach good filler dispersion with the HA nanocrystals interconnected in a network without the presence of agglomerates. Thermal degradation of HDPE-HA composites involved chemical degradation reaction of first order, accompanied by formation of the gas phase inside the melt polymer.

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Edição

Vol. 30 N.º 1 (2015): Revista de la Facultad de Ingeniería

Secção

Ingeniería Metalúrgica y Ciencias de los Materiales

Licença

 

Licencia de Creative Commons

Este obra está bajo una licencia de Creative Commons Reconocimiento 4.0 Internacional.

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