Mechanical and Morphological Properties of Polypropylene/Polyoxymethylene Blends

Abstract

This work studies the mechanical and morphological properties of polypropylene (PP)/polyoxymethylene (POM) blends. The PP/POM blends were prepared by melting-blend with an internal mixer. The contents of PP were used at 10%, 20%, 30%, 70%, 80% and 90% by weight. The phase morphology of the blends was observed by scanning electron microscope (SEM) due to the mechanical properties depended on the phase morphology. The results show the decrease of the impact strength, Young's modulus and tensile strength of POM/PP blends with increasing of PP content up to 30 wt% and then increase again with a high PP content. The percent strain at break of the blends increases after adding PP in a range of 70 -90 wt%. SEM study reveals that the POM/PP blends clearly demonstrate a two-phase matrix-particle microstructure. The results also show that the domain size of dispersed PP or POM phase increases with increasing PP or POM content. The POM domain size is smaller than the PP domain size which leads to a little change of mechanical results of PP.

Evidence of compatibility and thermal stability improvement of poly(propylene carbonate) and polyoxymethylene blends

“…Polymer blending is a convenient and efficient method to produce new materials that can combine the excellent properties of more than one component. An advantage of polymeric blends is the possibility to achieve a wide range of properties by adjusting the ratio of the components in the blend and the processing conditions . However, this is not a straight forward technique.…”

“…In order to obtain a blend with tailored properties, some level of compatibility must exist between the polymer pairs. Specifically, a synergistic effect among the components is required to obtain improved properties with respect to the neat resins …”

Thermal, physico‐mechanical, and morphological properties of HDPE graft‐copolymerized with polystyrene

“…The formed voids are quite different in shape compared with the voids observed by Jose et al in the case of immiscible blends of PP and HDPE . There is no sign of phase separation or formation of sphere‐shaped voids such as shown in the case of compatibilized polymer blends, which suggest that PS became an integral part of the HDPE polymer.…”

Preparation and characterization of polyoxymethylene nanocomposites

“…The XRD patterns showed that the interlayer spacing of the intercalated phase increased from 6.15 to 11.18 Ǻ indicating that the polymer was inserted into the MoS 2 galleries. The effect of Al 2 O 3 on mechanical and morphological properties of POM/Al 2 O 3 nanocomposites was investigated by Wacharawichanant et al (2011). Next, POM/ MoS 2 nanoballs composite was prepared and compared with POM/micro-MoS 2 composite.…”