Preparation of inorganic-organic hybrids made of polyhedral oligomeric silsesquioxanes (POSS) and polyamide 6 (PA6) has been attempted either by melt mixing of the two components or by in-situ polymerization of e-caprolactam (CL) in presence of POSS. The samples have been characterized by wide angle X-ray diffraction (WAXD) and scanning electron microscopy (SEM) techniques. Specific processing conditions (namely, high T in presence of different shear stresses) have been tested. Two different approaches for melt mixing have been used and the morphology of the corresponding systems compared. The melt-mixed pairs prepared in the microcompounder revealed a coarse phase separation, while those made in a simple mixer did not show any perceivable POSS segregation phenomenon, as evidenced by both WAXD data and SEM investigation. Similarly, the in-situ polymerization of CL in presence of POSS did not result in any POSS self-aggregation in the polyamide matrix, achieving a very fine Si dispersion of nanometric dimensions.
|Titolo:||Morphology of inorganic–organic systems consisting of polyhedral oligomeric silsesquioxanes (POSS) and polyamide 6|
ALONGI, JENNY (Primo)
|Parole Chiave:||POSS; PA 6; polyamide; e-caprolactam; nano composites|
|Settore Scientifico Disciplinare:||Settore CHIM/04 - Chimica Industriale|
|Data di pubblicazione:||2009|
|Digital Object Identifier (DOI):||10.1515/epoly.2009.9.1.325|
|Appare nelle tipologie:||01 - Articolo su periodico|