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    Advantage of preserving bi-orientation structure of isotactic polypropylene through die drawing

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    Publication date
    2021-01
    Author
    Lyu, D.
    Sun, Y.Y.
    Lai, Y.Q.
    Thompson, Glen P.
    Caton-Rose, Philip D.
    Coates, Philip D.
    Lu, Y.
    Men, Y.F.
    Keyword
    Die-drawing
    Isotactic polypropylene
    Solid-state deformation
    Bi-orientation
    WAXD
    Rights
    © 2020, Chinese Chemical Society Institute of Chemistry, Chinese Academy of Sciences Springer-Verlag GmbH Germany, part of Springer Nature. Reproduced in accordance with the publisher's self-archiving policy. The final publication is available at Springer via https://doi.org/10.1007/s10118-020-2465-z.
    Peer-Reviewed
    Yes
    Open Access status
    Green
    
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    Abstract
    The isotactic polypropylene (iPP) usually shows a unique parent-daughter lamellae structure in which the parent and daughter lamellae are against each other with a near perpendicular angle (80° or 100°). Inducing a high fraction of oriented cross-hatched structure in iPP during processing is desirable for designing the bi-oriented iPP products. We processed a commercial iPP via tensile-stretching and die-drawing to evaluate the structural evolution of oriented parent-daughter lamellae. It turned out that the die-drawing process had an advantage in attaining a high fraction of oriented cross-hatched structure of iPP, as compared to the free tensile stretching. Besides, the presence of α-nucleating agents affected the formation of oriented parent-daughter lamellae in the die-drawn samples whereas such influence diminished in the free stretched ones. It was found that the confined deformation inside the die led to the well-preserved oriented cross-hatched structure in the die-drawn iPP.
    URI
    http://hdl.handle.net/10454/18318
    Version
    Accepted manuscript
    Citation
    Lyu D, Sun YY, Lai YQ et al (2021) Advantage of preserving bi-orientation structure of isotactic polypropylene through die drawing. Chinese Journal of Polymer Science. 39(1): 91-101.
    Link to publisher’s version
    https://doi.org/10.1007/s10118-020-2465-z
    Type
    Article
    Collections
    Engineering and Informatics Publications

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