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Early Stage Crystallization in Poly (Ethylene-Co-Hexene) by SAXS/WAXD, DSC, OM and AFM

Published

Author(s)

G Z. Wang, Haonan Wang, K Shimizu, Charles C. Han, B S. Hsiao

Abstract

Isothermal crystallization in the early stages of one short-chain branching polyethylene, PEH, is examined by time-resolved SAXS/WAXD, DSC, optical microscope and AFM. WAXD showed a rapid decrease of the inter-chain distance in the amorphous phase at the supercooled state, which occurs even before the detection of density fluctuations from SAXS can be made. A nucleation induced crosslinking-like network has been proposed , which can also explain the continuing decrease in D-spacing of the amorphous phase. DSC results are in good agreement with the X-ray data. Thick lamellae are formed at high temperatures but the crystallinity is relatively low. As crystallized, a sheaf-like morphology was observed in PEH, which consist of regularly layered lamellae.
Citation
Journal of the American Chemical Society
Volume
222

Keywords

AFM, crystallization, DSC, morphology, PEH, polymer, SAXS, WAXD

Citation

Wang, G. , Wang, H. , Shimizu, K. , Han, C. and Hsiao, B. (2001), Early Stage Crystallization in Poly (Ethylene-Co-Hexene) by SAXS/WAXD, DSC, OM and AFM, Journal of the American Chemical Society, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=851887 (Accessed April 12, 2024)
Created July 31, 2001, Updated October 12, 2021