Dispersion of TiO2 Particles in PET/PP/TiO2 and PET/PP/PP-g-MA/TiO2 Composites Prepared with Different Blending Procedures

✍ Scribed by Wenjing Li; József Karger-Kocsis; Alois K. Schlarb

• Publisher: John Wiley and Sons
• Year: 2009
• Tongue: English
• Weight: 842 KB
• Volume: 294
• Category: Article
• ISSN: 1438-7492
• DOI: 10.1002/mame.200900123

✦ Synopsis

Abstract

2 vol.‐% TiO~2~ particles were incorporated into PET/PP blends with and without MA‐grafted PP compatibilizer. During extrusion of the PET/PP/TiO~2~ composites the TiO~2~ particles migrated from the PP matrix to the PET‐dispersed phase irrespective of the blending route. For the PET/PP/PP__‐g‐__MA/TiO~2~ composites, however, the location of TiO~2~ depended on the blending sequence. The preferred location of the TiO~2~ nanoparticles was confirmed by SEM pictures taken from the chemically etched surface of the blends. The observed migration behavior was traced to differences in the interfacial tensions between TiO~2~ and PET and TiO~2~ and PP, and to TiO~2~ encapsulation in one of the blend components during the related blending procedure.

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