ISSN:
1573-4803
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract In this second part of the study concerning the characterization of new flame-retardant materials, special attention has been paid to a ductile-brittle transition which occurs at about 70° C. In order to evidence the causes of this unexpected phenomenon of brittleness, all the tensile mechanical properties (tensile strength, strain at break and modulus of elasticity) of filled and unfilled EPDM-polyethylene blends are systematically studied in relation to thermal conditions. Examination of the fracture facies of broken samples, at different temperatures, clearly points out this transition. It is shown that the presence of a rubber phase within the matrix is solely responsible for this type of behaviour. The fracture energy of the blends, as a function of filler volume fraction and temperature, is also determined. Finally, a very simple test on folded samples, allowing a precise determination of the critical temperature at which the ductile-brittle transition occurs, is developed.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01107456
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