Correlation Between Phase Separation and Crystallization of Poly(ethylene-co-hexene) and Poly(ethylene-co-octene)
G Matsuba, K Shimizu, Haonan Wang, Z G. Wang, Charles C. Han
In order to understand the interaction between LLPS and crystallization in copolymer blends of PEH and PEOC, the phase contrast microscopy and simultaneous SAXS/WAXD measurements were employed to observe the morphological developments. The LLPS can be observed with the phase contrast microscopy technique even with a very small refractive indices difference between PE and PEOC. Phase contrast microscopy is a very sensitive measurement tool for such polyolefin blends system. We can find the LLPS and study the late stage spinodal decomposition kinetics with this technique. From the simultaneous SAXS/ WAXD measurements, we can find the crystrallnity dependence of PEH concentration. This suggests that the presence of PEOC component decreases the crystallinity of PE, however, it can co-crystallize with the PE and increase the relative crystallinity of the system. In SAXS measurement, we can find the low-q side increasing because of the LLPS.
, Shimizu, K.
, Wang, H.
, Wang, Z.
and Han, C.
Correlation Between Phase Separation and Crystallization of Poly(ethylene-co-hexene) and Poly(ethylene-co-octene), Journal of the American Chemical Society
(Accessed December 11, 2023)