Effect of the liquid-liquid phase separation on the crystallization behavior and mechanical properties of poly(ethylene-ran-vinyl acetate) and paraffin wax blend

摘要: The effect of liquid-liquid phase-separation (LLPS) on the crystallization behavior and mechanical properties poly(ethylene-ran-vinyl acetate) (EVA) with various amounts vinyl acetate paraffin wax blend was investigated. EVA-H (9.5% became homogeneous at temperatures greater than its upper critical solution temperature (UCST) (98°C), an LLPS observed between UCST melting point 88°C for in blend. existence is attributed to relatively large amount hydrophilic component EVA, although molecular weight just 560. However, did not occur EVA/wax when content EVA less 3%. This explained by using Flory-Huggins lattice model effective interaction parameter. degree crystallinity EVA-H/wax blend, judged from a endothermic peak differential scanning calorimeter (DSC) thermograms obtained during heating runs, decreased increasing duration time region. flexural modulus maximum certain composition (about 30 ∼ 40 wt % depending upon acetate). can be fact that this has largest relative measured DSC wide-angle X-ray scattering method. We found binder itself directly related feedstock consisting larger metal powder binder, which help someone develop suitable system injection molding process.