Structure–Microhardness Correlation in Blends of Nylon 6/Nylon 66 Monofilaments

摘要

The microstructure (crystallinity, long spacing) and the micromechanical\udproperties (microhardness H) of two series of nylon 6 and nylon 66 monofilaments and\udtheir blends were investigated as a function of annealing temperature TA and uniaxial\uddeformation in a wide composition range. In case of the homopolymers, the gradual rise\udof microhardness with TA is interpreted in the light of the increasing values of the\udcrystallinity a and the hardness of the crystals Hc. The depression of the hardness\udvalues of the blends from the additive behavior of the hardness of individual components is discussed in the basis of the crystallinity depression of one component by the second one and viceversa. Finally, the influence of drawing and pressing the blends at 130°C which leads to a hardness increase is also explained in the light of an increase in the Hc value of nylon 66 due to orientation.