Structure Development From Simultaneous Phase Separation and Crystallization of Metallocene Polyolefin Blends

Published

August 1, 2002

Author(s)

Charles C. Han, Haonan Wang, K Shimizu, H W. Kim, Erik K. Hobbie, Z G. Wang

Abstract

Non-linear structural dynamics in polymer blends can be expected when dual or multiple phase ordering processes co-exist. In a typical case of liquid-liquid phase separation (LLPS) and crystallization co-existence in polyolefin blends, linear dynamics of crystal growth and LLPS is observed at low and high temperatures respectively, where interferences from each other is negligible. In the cross-over regime, interplay between LLPS and crystallization causes non-linear ordering because of the structural and rheological heterogeneity. On the other hand, cyclic crystallization and melting in a previously phase-separated blend causes immediate large-scale coarsening and progressive fine-scale sharpening. In view of the obvious importance to many applications, the potential of complex structures arising from non-linear dynamics in polymer blends need much in-depth exploration.

Proceedings Title

American Chemical Society; Division of Polymer Chemistry, National Meeting | 224th | | American Chemical Society (ACS)

Volume

43

Issue

No. 2

Conference Dates

August 1, 2002

Conference Title

Polymer Preprints

Pub Type

Conferences

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Keywords

crystallization, non-linear dynamics, phase separation, polyolefin blends, structure

Citation

Han, C. , Wang, H. , Shimizu, K. , Kim, H. , Hobbie, E. and Wang, Z. (2002), Structure Development From Simultaneous Phase Separation and Crystallization of Metallocene Polyolefin Blends, American Chemical Society; Division of Polymer Chemistry, National Meeting | 224th | | American Chemical Society (ACS), [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=852023 (Accessed July 21, 2024)