کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1400825 | 984660 | 2009 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Transmission electron microscopy study of phase morphology in polypropylene/ethylene-octene copolymer blends Transmission electron microscopy study of phase morphology in polypropylene/ethylene-octene copolymer blends](/preview/png/1400825.png)
Blends of polypropylene (PP) and ethylene-octene copolymers (EOC) were investigated by transmission electron microscopy (TEM) and by differential scanning calorimetry (DSC). The EOC contained 28, 37, 40 or 52 wt% of octene. Only the 50/50 PP/EOC ratio was used for all blends. None of the blends was fully miscible, there was always two-phase morphology. TEM observation followed by image analysis by ImageJ software revealed that the largest particles were in blend containing EOC-28 and the smallest were in blend with EOC-52. The coarsening rate at 200 °C was evaluated by TEM. The glass transition temperature (Tg) shift indicated partial miscibility. Partial miscibility was then confirmed by direct observation of bright PP lamellae in EOC dark phase.
Journal: European Polymer Journal - Volume 45, Issue 5, May 2009, Pages 1485–1492