Strain dependent crystallization of isotactic polypropylene during solid-state stretching

In this study, the crystallization behavior of oriented isotactic polypropylene during solid-state stretching was investigated by in-situ wide-angle X-ray scattering. Results showed that a new arc appeared on the (040) reflection with the previous arcs remained when the stretching direction was incl...

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Autores principales:	Xiang Liu, Lin Zou, Baobao Chang, Honghui Shi, Qingqing Yang, Kaichang Cheng, Taolin Li, Konrad Schneider, Gert Heinrich, Chuntai Liu, Changyu Shen
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Solid-state stretching Crystallization Wide angle X-ray scattering Isotactic polypropylene Polymers and polymer manufacture TP1080-1185
Acceso en línea:	https://doaj.org/article/92c6be19aca74f249470f3b9aa271f9a
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id	oai:doaj.org-article:92c6be19aca74f249470f3b9aa271f9a
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spelling	oai:doaj.org-article:92c6be19aca74f249470f3b9aa271f9a2021-11-14T04:28:09ZStrain dependent crystallization of isotactic polypropylene during solid-state stretching0142-941810.1016/j.polymertesting.2021.107404https://doaj.org/article/92c6be19aca74f249470f3b9aa271f9a2021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S0142941821003482https://doaj.org/toc/0142-9418In this study, the crystallization behavior of oriented isotactic polypropylene during solid-state stretching was investigated by in-situ wide-angle X-ray scattering. Results showed that a new arc appeared on the (040) reflection with the previous arcs remained when the stretching direction was inclined to the initial orientation direction, as a result of stretching induced crystallization. The crystallization process occurred later than the yielding but earlier than the strain hardening. The crystallinity of the newly formed crystal showed a linear dependence on the Hencky strain, and the slope of the plot was more sensitive to the stretching angle rather than the stretching temperature. Lastly, the stress relaxation test showed that the crystallinity was linear correlated to the amorphous phase orientation. The Pearson correlation coefficient was as high as −0.99, suggesting that the crystallization process is originated from the orientation of the chain network during stretching.Xiang LiuLin ZouBaobao ChangHonghui ShiQingqing YangKaichang ChengTaolin LiKonrad SchneiderGert HeinrichChuntai LiuChangyu ShenElsevierarticleSolid-state stretchingCrystallizationWide angle X-ray scatteringIsotactic polypropylenePolymers and polymer manufactureTP1080-1185ENPolymer Testing, Vol 104, Iss , Pp 107404- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Solid-state stretching Crystallization Wide angle X-ray scattering Isotactic polypropylene Polymers and polymer manufacture TP1080-1185
spellingShingle	Solid-state stretching Crystallization Wide angle X-ray scattering Isotactic polypropylene Polymers and polymer manufacture TP1080-1185 Xiang Liu Lin Zou Baobao Chang Honghui Shi Qingqing Yang Kaichang Cheng Taolin Li Konrad Schneider Gert Heinrich Chuntai Liu Changyu Shen Strain dependent crystallization of isotactic polypropylene during solid-state stretching
description	In this study, the crystallization behavior of oriented isotactic polypropylene during solid-state stretching was investigated by in-situ wide-angle X-ray scattering. Results showed that a new arc appeared on the (040) reflection with the previous arcs remained when the stretching direction was inclined to the initial orientation direction, as a result of stretching induced crystallization. The crystallization process occurred later than the yielding but earlier than the strain hardening. The crystallinity of the newly formed crystal showed a linear dependence on the Hencky strain, and the slope of the plot was more sensitive to the stretching angle rather than the stretching temperature. Lastly, the stress relaxation test showed that the crystallinity was linear correlated to the amorphous phase orientation. The Pearson correlation coefficient was as high as −0.99, suggesting that the crystallization process is originated from the orientation of the chain network during stretching.
format	article
author	Xiang Liu Lin Zou Baobao Chang Honghui Shi Qingqing Yang Kaichang Cheng Taolin Li Konrad Schneider Gert Heinrich Chuntai Liu Changyu Shen
author_facet	Xiang Liu Lin Zou Baobao Chang Honghui Shi Qingqing Yang Kaichang Cheng Taolin Li Konrad Schneider Gert Heinrich Chuntai Liu Changyu Shen
author_sort	Xiang Liu
title	Strain dependent crystallization of isotactic polypropylene during solid-state stretching
title_short	Strain dependent crystallization of isotactic polypropylene during solid-state stretching
title_full	Strain dependent crystallization of isotactic polypropylene during solid-state stretching
title_fullStr	Strain dependent crystallization of isotactic polypropylene during solid-state stretching
title_full_unstemmed	Strain dependent crystallization of isotactic polypropylene during solid-state stretching
title_sort	strain dependent crystallization of isotactic polypropylene during solid-state stretching
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/92c6be19aca74f249470f3b9aa271f9a
work_keys_str_mv	AT xiangliu straindependentcrystallizationofisotacticpolypropyleneduringsolidstatestretching AT linzou straindependentcrystallizationofisotacticpolypropyleneduringsolidstatestretching AT baobaochang straindependentcrystallizationofisotacticpolypropyleneduringsolidstatestretching AT honghuishi straindependentcrystallizationofisotacticpolypropyleneduringsolidstatestretching AT qingqingyang straindependentcrystallizationofisotacticpolypropyleneduringsolidstatestretching AT kaichangcheng straindependentcrystallizationofisotacticpolypropyleneduringsolidstatestretching AT taolinli straindependentcrystallizationofisotacticpolypropyleneduringsolidstatestretching AT konradschneider straindependentcrystallizationofisotacticpolypropyleneduringsolidstatestretching AT gertheinrich straindependentcrystallizationofisotacticpolypropyleneduringsolidstatestretching AT chuntailiu straindependentcrystallizationofisotacticpolypropyleneduringsolidstatestretching AT changyushen straindependentcrystallizationofisotacticpolypropyleneduringsolidstatestretching
_version_	1718430028408029184

Strain dependent crystallization of isotactic polypropylene during solid-state stretching

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