Impact fracture toughness of polyethylene/polypropylene multilayers
Citations Over Time
Abstract
Abstract In a number of applications, a brittle polymeric surface layer is deliberately molded onto a tough substrate for decorative or protective purposes. This can increase the susceptibility of the tough polymer to premature failure. Similar problems arise when a surface layer becomes embrittled by environmental effects. Choosing a surface material that has good mechanical properties without having this effect can be difficult. In this work the fracture resistances of two polyethylenes and an ethylene/propylene copolymer, and of symmetrical two‐component multilayers of these polymers, were determined as a function of temperature, using instrumented impact tests. The law of mixtures accounts adequately for the fracture resistance of multilayer structures where there is no mechanical interaction between skin and core. However, it gave misleading results for a structure in which high skin modulus at low temperatures appeared to influence the fracture resistance of the core through a constraint effect. Polym. Eng. Sci. 44:1627–1635, 2004. © 2004 Society of Plastics Engineers.
Related Papers
- → Handbook of Polypropylene and Polypropylene Composites(1999)331 cited
- Research Progress on Toughening Modification of Polypropylene(2009)
- Modification and characterization of polypropylene(2014)
- → Oxygen absorption studies on polypropylene(1964)1 cited
- The Research Situation of Toughening Modification of PVC(2007)