The structure and morphology of a commercial heterogeneous poly(ethylene-co-propylene) system (Adflex C202G) and its blends with poly(propylene) (PP) were investigated. Adflex is a complex mixture of copolymers with various C-2/C-3 ratio. Three components showing different solubility in xylene were separated by fractionation. Physical and chemical analyses of Adflex and of its various fractions suggest that Adflex consists of a semi-crystalline C-3-rich phase and a less crystalline C-2-rich phase containing spherical particles with an essentially amorphous interphase. In PP-Adflex blends, interactions between PP molecules and Adflex are evidenced by thermal analysis. Morphological studies of the blends show a spherulitic structure in the fractions containing at least 60% of PP.
Structure and Morphology of a Novel Ethylene-Propylene Copolymer and Its Blends with Polypropylene
PEGORARO, MARIO;SEVERINI, FEBO;DI LANDRO, LUCA ANGELO;
2000-01-01
Abstract
The structure and morphology of a commercial heterogeneous poly(ethylene-co-propylene) system (Adflex C202G) and its blends with poly(propylene) (PP) were investigated. Adflex is a complex mixture of copolymers with various C-2/C-3 ratio. Three components showing different solubility in xylene were separated by fractionation. Physical and chemical analyses of Adflex and of its various fractions suggest that Adflex consists of a semi-crystalline C-3-rich phase and a less crystalline C-2-rich phase containing spherical particles with an essentially amorphous interphase. In PP-Adflex blends, interactions between PP molecules and Adflex are evidenced by thermal analysis. Morphological studies of the blends show a spherulitic structure in the fractions containing at least 60% of PP.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
