| 초록 |
Polyoxymethylene(POM)/calcium carbonate(CaCO3) composites were prepared by melt mixing with a twin extruder. CaCO3 particles were treated with a silane compound and the effect of the modification on the isothermal crystallization of the composites was explored. Both the hot crystallization temperature (Tc) and the degree of crystallinity of POM/silane-modified CaCO3 composites were higher than those of neat POM and POM/pristine CaCO3, which was ascribed to the nucleation effect of the silane modified CaCO3. The crystallization behavior was monitored using DSC and polarized optical microscopy. The specific interaction between POM matrix and CaCO3 before and after the modification was quantified by the Flory–Huggins interaction parameter, B, which was determined by combining the melting point depression and the binary interaction model. The polarized micrographs of POM/CaCO3 composites were analyzed taking onto consideration of the resulting interaction parameters. |
