Advantage of preserving bi-orientation structure of isotactic polypropylene through die drawing
Yes === 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...
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ndltd-BRADFORD-oai-bradscholars.brad.ac.uk-10454-183182021-08-19T05:01:12Z Advantage of preserving bi-orientation structure of isotactic polypropylene through die drawing Lyu, D. Sun, Y.Y. Lai, Y.Q. Thompson, Glen P. Caton-Rose, Philip D. Coates, Philip D. Lu, Y. Men, Y.F. Die-drawing Isotactic polypropylene Solid-state deformation Bi-orientation WAXD Yes 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. This work was financially supported by the National Natural Science Foundation of China (Nos. 21704102, U1832186, and 51525305), Newton Advanced Fellowship of the Royal Society, United Kingdom (No. NA150222) and ExxonMobil Asia Pacific Research & Development Co., Ltd. 2021-01-13T12:03:23Z 2021-01-19T11:57:39Z 2021-01-13T12:03:23Z 2021-01-19T11:57:39Z 2021-01 2020-06-04 2020-08-17 2021-01-13T12:03:26Z Article Accepted manuscript 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. http://hdl.handle.net/10454/18318 en https://doi.org/10.1007/s10118-020-2465-z © 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. |
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language |
en |
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topic |
Die-drawing Isotactic polypropylene Solid-state deformation Bi-orientation WAXD |
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Die-drawing Isotactic polypropylene Solid-state deformation Bi-orientation WAXD Lyu, D. Sun, Y.Y. Lai, Y.Q. Thompson, Glen P. Caton-Rose, Philip D. Coates, Philip D. Lu, Y. Men, Y.F. Advantage of preserving bi-orientation structure of isotactic polypropylene through die drawing |
description |
Yes === 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. === This work was financially supported by the National Natural Science Foundation of China (Nos. 21704102, U1832186, and 51525305), Newton Advanced Fellowship of the Royal Society, United Kingdom (No. NA150222) and ExxonMobil Asia Pacific Research & Development Co., Ltd. |
author |
Lyu, D. Sun, Y.Y. Lai, Y.Q. Thompson, Glen P. Caton-Rose, Philip D. Coates, Philip D. Lu, Y. Men, Y.F. |
author_facet |
Lyu, D. Sun, Y.Y. Lai, Y.Q. Thompson, Glen P. Caton-Rose, Philip D. Coates, Philip D. Lu, Y. Men, Y.F. |
author_sort |
Lyu, D. |
title |
Advantage of preserving bi-orientation structure of isotactic polypropylene through die drawing |
title_short |
Advantage of preserving bi-orientation structure of isotactic polypropylene through die drawing |
title_full |
Advantage of preserving bi-orientation structure of isotactic polypropylene through die drawing |
title_fullStr |
Advantage of preserving bi-orientation structure of isotactic polypropylene through die drawing |
title_full_unstemmed |
Advantage of preserving bi-orientation structure of isotactic polypropylene through die drawing |
title_sort |
advantage of preserving bi-orientation structure of isotactic polypropylene through die drawing |
publishDate |
2021 |
url |
http://hdl.handle.net/10454/18318 |
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