Premium
MEASUREMENT OF MECHANICAL PROPERTIES OF COEXTRUDED DUAL‐PHASE PRODUCTS
Author(s) -
SAMUEL LALITHA,
DOGAN HULYA,
MCGRANE SCOTT,
KOKINI JOZEF L.
Publication year - 2007
Publication title -
journal of texture studies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.593
H-Index - 54
eISSN - 1745-4603
pISSN - 0022-4901
DOI - 10.1111/j.1745-4603.2007.00118.x
Subject(s) - materials science , composite material , toughness , extrusion , characterization (materials science) , penetration (warfare) , nanotechnology , mathematics , operations research
This study focused on developing and validating a comprehensive, objective and robust methodology for the textural characterization of coextruded dual‐phase products. Uniaxial compression and penetration tests were done to measure the mechanical properties of the different phases, the shell and the filler on whole dual‐phase products. The resulting force deformation curves were used to derive quantitative measures for the textural properties of the shell and the filler phases of the products. Among the techniques used for textural characterization, penetration tests with a punch probe gave the most reliable, reproducible and comprehensive mechanical characterization of the dual‐phase products. Textural parameters corresponding to the shell and filler were hardness, energy required to shear through the individual phases (toughness) and the elasticity of the shell. The developed methodology was first tested with model materials, whose mechanical properties are well known, and then validated using dual‐phase products available commercially for human and pet consumption.PRACTICAL APPLICATIONS Dual‐texture products utilizing extrusion are commercially available with a crunchy exterior shell and a soft viscous filler inside the shell. A method was developed in this study using a penetration probe to assess the quality of dual‐texture extruded products. The developed method works on model systems and commercially available samples.