Fracture of ultrafine calcium carbonate/polypropylene composites

Journal Article · Wed Feb 01 00:00:00 EST 1989 · Poly. Compos.; (United States)

DOI:https://doi.org/10.1002/pc.750100106· OSTI ID:6091991

Levita, G; Marchetti, A; Lazzeri, A

The strength and fracture properties of a polypropylene filled with ultrafine calcium carbonate (0.07 micron) have been studied in the composition range of 0 to 40 percent by volume. Untreated and surface treated (with stearic acid and a titanate coupling agent) grades have been considered. The untreated filler caused a decrease of toughness, whereas a maximum, at about 10 percent, was observed for the treated filler. The fracture energy was analyzed in terms of the crack-pinning model. Due to the very small size of particles, the pinning contribution proved to be negligible. 30 references.

• Research Organization: Pisa Univ. (Italy)
• OSTI ID: 6091991
• Journal Information: Poly. Compos.; (United States), Vol. 10
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CALCIUM CARBONATES
MECHANICAL PROPERTIES
POLYPROPYLENE
COMPOSITE MATERIALS
CRACK PROPAGATION
CRACKS
ELASTICITY
FRACTURE PROPERTIES
THERMAL EXPANSION
ALKALINE EARTH METAL COMPOUNDS
CALCIUM COMPOUNDS
CARBON COMPOUNDS
CARBONATES
EXPANSION
MATERIALS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
OXYGEN COMPOUNDS
POLYMERS
POLYOLEFINS
TENSILE PROPERTIES
360603* - Materials- Properties