were premodified by two different methods priorto the polymer melt intercalation. In one case MMTs were modified with cetyltrimethylammonium bromide (CTAB)
andtermed as organomontmorillonites (OMMTs); in the other case MMTs were modified by nylon
and the products were calledmodified montmorillonites (MMMTs). The effects of CTAB and nylon on the MMTs were investigated by using TG andWAXD. The results show that interlayer spacings of CTAB and nylon modified MMTs are larger than that of sodium MMTs.Then polyamide 66 (PA 66)/MMT nanocomposites were obtained through the method of melt intercalation of polymers.The nanocomposites were characterized by WAXD
TEM and Molau experiments.The results indicate that the MMTs disperse homogeneously in the PA 66 matrix.The mechanical properties of nanocomposites
such as tensile properties and flexural properties
were also measured and show a tendency to increase with increase of MMT content and reach the maximum values at 5phr MMT content.The heat distortion temperature (HDT) of the nanocomposites(7 phr) is about 32 K higher than that of pure PA 66.
Abstract
The montmorillonites (MMTs)
layered
smectite-type silicates
were premodified by two different methods priorto the polymer melt intercalation. In one case MMTs were modified with cetyltrimethylammonium bromide (CTAB)
andtermed as organomontmorillonites (OMMTs); in the other case MMTs were modified by nylon
and the products were calledmodified montmorillonites (MMMTs). The effects of CTAB and nylon on the MMTs were investigated by using TG andWAXD. The results show that interlayer spacings of CTAB and nylon modified MMTs are larger than that of sodium MMTs.Then polyamide 66 (PA 66)/MMT nanocomposites were obtained through the method of melt intercalation of polymers.The nanocomposites were characterized by WAXD
TEM and Molau experiments.The results indicate that the MMTs disperse homogeneously in the PA 66 matrix.The mechanical properties of nanocomposites
such as tensile properties and flexural properties
were also measured and show a tendency to increase with increase of MMT content and reach the maximum values at 5phr MMT content.The heat distortion temperature (HDT) of the nanocomposites(7 phr) is about 32 K higher than that of pure PA 66.
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