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Creep Behavior and Delayed Fracture of Tough Polyampholyte Hydrogels by Tensile Test

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タイトル: Creep Behavior and Delayed Fracture of Tough Polyampholyte Hydrogels by Tensile Test
著者: Karobi, Sadia Nazneen 著作を一覧する
Sun, Tao Lin 著作を一覧する
Kurokawa, Takayuki 著作を一覧する
Luo, Feng 著作を一覧する
Nakajima, Tasuku 著作を一覧する
Nonoyama, Takayuki 著作を一覧する
Gong, Jian Ping 著作を一覧する
発行日: 2016年 8月 9日
出版者: American Chemical Society(ACS)
誌名: Macromolecules
巻: 49
号: 15
開始ページ: 5630
終了ページ: 5636
出版社 DOI: 10.1021/acs.macromol.6b01016
抄録: Polyampholyte (PA) hydrogels are a new class of tough and selfhealing supramolecular hydrogels that have a potential as load-bearing soft materials. Studying on the creep behavior of these hydrogels and understanding the molecular mechanism are important for prediction of lifetime of the materials. In the present work, we study the creep rupture dynamics of the PA hydrogels with and without chemical cross-linking, in a certain observation time window. We have found that above some critical loading stress both physical and lightly chemically cross-linked hydrogels undergo creep rupture while moderately chemically cross-linked hydrogel resists creep flow. To elucidate the molecular mechanism, we have further compared the creep behaviors of the physical and lightly chemically cross-linked samples. The creep rate of the samples decreases with the creep time, following a power law relation, regardless of the loading stress variation. The fracture time of both of these hydrogels exponentially decreases with the increase of the loading stress, following the same master curve at high loading stress region, while the behavior of the two samples becomes different in the low loading stress region. We have explained the delayed fracture dynamics at high loading stress region in terms of a relatively weak strong bond rupture mechanism.
Rights: This document is the Accepted Manuscript version of a Published Work that appeared in final form in Macromolecules, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see
資料タイプ: article (author version)
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 龔 剣萍 (Gong Jian Ping)


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