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Adj.1.untoughened - physically untougheneduntoughened - physically untoughened; "tender feet"
weak - wanting in physical strength; "a weak pillar"
References in periodicals archive ?
The fracture surfaces of the toughened and untoughened epoxies were examined with scanning electron microscope.
The SEM micrographs of the fracture surfaces of untoughened and toughened epoxy resin are shown in Figs.
LEFM tests were conducted on the [TABULAR DATA FOR TABLE 1 OMITTED] untoughened nylons and the phenolic/burlap system according to ASTM D5045 at a rate of 0.
The untoughened nylons are linear elastic materials and were tested using LEFM techniques to quantify their initiation toughnesses The fracture toughness results for N6 and N66 are given in Table 2 with the results for the phenolic/burlap material currently used in the casters.
66] found that the temperature of maximum toughness was shifted some 50-120[degrees]C lower in rubber-toughened thermoset systems, compared to untoughened systems, with the actual toughness of the former systems being 4X higher.
Resin 9, an untoughened formulation with silica, showed a unique reproducible behavior where the minimum viscosity temperature actually was significantly below the reaction initiation temperature.
This influence of the particle size, however, is not general in untoughened polymer blends; this is because similar ductilities in blends with different miscibility levels were observed among others in PMMA/phenoxy (33) and in PEI/PAr blends (46).
g]s for the untoughened epoxy resins, indicating that very little rubber still remains in the matrix phase.
Using a toughened carbon fiber composite as a model system and a conventional untoughened composite as a base for comparison, impact damages and residual compressive strengths of the composites were compared.