Correlation Between Phase Separation and Crystallization of Poly(ethylene-co-hexene) and Poly(ethylene-co-octene)

Published

August 1, 2002

Author(s)

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

Abstract

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.

Citation

Journal of the American Chemical Society

Volume

224

Pub Type

Journals

Keywords

blends, copolymers, crystalline polymers, polyolefin, scattering microscopy

Citation

Matsuba, G. , Shimizu, K. , Wang, H. , Wang, Z. and Han, C. (2002), Correlation Between Phase Separation and Crystallization of Poly(ethylene-co-hexene) and Poly(ethylene-co-octene), Journal of the American Chemical Society (Accessed October 21, 2025)