Mechanical and morphological characterization of polypropylene toughened with olefinic elastomer



Título del documento: Mechanical and morphological characterization of polypropylene toughened with olefinic elastomer
Revista: Materials research
Base de datos: PERIÓDICA
Número de sistema: 000312457
ISSN: 1516-1439
Autores: 1

Instituciones: 1Universidade Federal de Sao Carlos, Departamento de Engenharia de Materiais, Sao Carlos, Sao Paulo. Brasil
Año:
Periodo: Abr
Volumen: 3
Número: 2
Paginación: 37-44
País: Brasil
Idioma: Inglés
Tipo de documento: Artículo
Enfoque: Experimental
Resumen en inglés The effect of incorporating (C2-C8) ethylene-octene elastomer on the mechanical properties and morphology of polypropylene copolymers has been investigated employing two types of PP copolymer, with and without nucleating agent. The results were compared to the ones presented by a commercial PP heterophase (reactor impact modified PP/EPR). The addition of the elastomer increases the toughness of the blends but reduces their stiffness. PP blends in the low elastomer content region (< 20%) show low values of the Izod impact strength and both, elastomer content and impact strength, are directly proportional to the area under the b damping peak or its maximum intensity of the elastomer. The morphology is a continuous pattern of segregate elastomeric particles with average particle size in the range of 0.27 mm to 0.39 mm. The average particle size and particle size distribution plotted in log-normal distribution curves, increases slightly with the increase in the elastomer content. The reactor modified PP heterophase has a broader particle size distribution and an average particle size of 0.56 mm, at the lower limit but inside the range for good impact performance, as observed
Disciplinas: Ingeniería,
Química
Palabras clave: Ingeniería de materiales,
Química de polímeros,
Propiedades mecánicas,
Polipropileno,
Elastómeros,
Amortiguamiento,
Resistencia al impacto
Keyword: Engineering,
Chemistry,
Materials engineering,
Polymer chemistry,
Mechanical properties,
Polypropylene,
Elastomers,
Damping,
Impact resistance
Texto completo: Texto completo (Ver HTML)