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Phase Behavior in Polyolefin Blend



G Matsuba, K Shimizu, Haonan Wang, Z G. Wang, Charles C. Han


The phase behavior in copolymer blend of PEH(60)PEB(40) blend has been studied by phase contrast optical microscopy within the two phase region. In single quench, the interconnected biocontinuous structure was observed in molten state. The interconnected bicontinuous tubes coarsen with time. The FFT analysis with single quench results shows that the phase separation behavior observed can be explained by power low and is the late-stage of the spinodal decomposition. On the other hand in cyclic quench the liquid domains were enhanced by cyclic quench between molten and crystalline state. In molten state, the darker and lighter matrix corresponds to PEH and PEB-rich phase, respectively. A large secondary structure was formed through this repeated crystallization processes, which was accented by the PE rich region.
Journal of the American Chemical Society


liquid-liquid phase separation, optical microscopy, polyolefin blend, spinodal decomposition


Matsuba, G. , Shimizu, K. , Wang, H. , Wang, Z. and Han, C. (2002), Phase Behavior in Polyolefin Blend, Journal of the American Chemical Society, [online], (Accessed April 12, 2024)
Created August 1, 2002, Updated February 17, 2017