Study of lineal and non lineal viscoelastic behavior of PP/PA-6 polymer blends compatibilized or no.

Author(s)

Guillermo Palmer Martín

• Document type: Doctoral Thesis
• Press: São Paulo.
• Institution: Universidade de São Paulo (USP). Escola Politécnica (EP/BC)
• Defense date: 2006-12-15

Examining board members

Nicole Raymonde Demarquette; Sebastião Vicente Canevarolo Júnior; Reinaldo Giudici; José Ignacio Hernández López; Denise Freitas Siqueira Petri

• Advisor: Nicole Raymonde Demarquette

Abstract

Rheological and morphological behaviour of polypropylene and polyamide polymer blend was studied. The values of interfacial tension were obtained between 10mN/m and 13mN/m. The interfacial tension decreased in 87% for compatibilized blend. Morphology analysis for linear viscoelastic regime shows dispersed drop diameter between 1,5µm and 20µm. The diameter of the drops decreased with the addition of maleic polypropylene reducing until 98%, keeping constant the concentration of the disperse phase. In non linear viscoelastic regime different models were tested to evaluate the behavior of the blends in shear and elongacional flows. However, only the elongacional flow results were acquired with theoretical - experimental corroboration. (AU)