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

Published

August 1, 2001

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

Pub Type

Journals

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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 December 14, 2024)