RT info:eu-repo/semantics/article
T1 Effect of mold temperature on the impact behavior and morphology of injection molded foams based on polypropylene polyethylene–octene copolymer blends
A1 Muñoz Pascual, Santiago
A1 López González, Eduardo
A1 Sáiz Arroyo, Cristina
A1 Rodríguez Pérez, Miguel Ángel
K1 Polypropylene
K1 Polipropileno
K1 Foams
K1 Espumas
K1 Polyethylene–octene copolymer
K1 Copolímero de polietileno-octeno
AB In this work, an isotactic polypropylene (PP) and a polyethylene–octene copolymer (POE) have been blended and injection-molded, obtaining solids and foamed samples with a relative density of 0.76. Different mold temperature and injection temperature were used. The Izod impact strength was measured. For solids, higher mold temperature increased the impact resistance, whereas in foams, the opposite trend was observed. In order to understand the reasons of this behavior, the morphology of the elastomeric phase, the crystalline morphology and the cellular structure have been studied. The presence of the elastomer near the skin in the case of high mold temperature can explain the improvement produced with a high mold temperature in solids. For foams, aspects as the elastomer coarsening in the core of the sample or the presence of a thicker solid skin are the critical parameters that justify the improved behavior of the materials produced with a lower mold temperature.
PB MDPI
SN 2073-4360
YR 2019
FD 2019
LK http://uvadoc.uva.es/handle/10324/40973
UL http://uvadoc.uva.es/handle/10324/40973
LA eng
NO Polymers, 2019, vol. 11, n. 5. 14 p.
NO Producción Científica
DS UVaDOC
RD 06-ago-2024