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Failure of multimaterial fusion bonding interface generated during over‐injection molding/thermoforming hybrid process
Author(s) -
Aurrekoetxea J.,
Castillo G.,
Cortes F.,
Sarrionandia M. A.,
Urrutibeascoa I.
Publication year - 2006
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.23696
Subject(s) - materials science , composite material , differential scanning calorimetry , polypropylene , fusion , molding (decorative) , substrate (aquarium) , thermoforming , shear strength (soil) , enthalpy of fusion , interface (matter) , ultimate tensile strength , melting point , thermodynamics , linguistics , philosophy , physics , oceanography , environmental science , capillary number , capillary action , soil water , soil science , geology
The effects of processing parameters on the strength of the fusion bonding interface have been investigated. The interface was generated when an isotactic polypropylene homopolymer was injection molded on a solid self‐reinforced polypropylene substrate. The interface strength was measured in shear configuration, and the melting behavior of substrate was studied using differential scanning calorimetry. The results show that strong bonding interface can be achieved when the correct processing parameters are chosen. The interfacial strength is largely improved if the interface temperature is higher than the melting temperature of the substrate layer, and in these specimens failure does not take place at the interface. Furthermore, for a fixed interface temperature, interface strength increases with thermal gradient. Finally, in the analyzed holding pressure range, pressure apparently has no effect on strength. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 102: 261–265, 2006