Asynchronous fracture of hierarchical microstructures in hard domain of thermoplastic polyurethane elastomer: Effect of chain extender

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	Asynchronous fracture of hierarchical microstructures in hard domain of thermoplastic polyurethane elastomer: Effect of chain extender
	Li, Xing; Guo, Yaqian; Zhang, Ruoyu; Xiao, Qiang; Guo, Hongxia; Wang, Zongbao; Chen, Jing; Zhu, Jin
刊名	POLYMER
	2018
卷号	138 页码:242-254
关键词	Diisocyanate-based Polyurethanes Microphase-separated Structure Hydrogen-bonding Properties X-ray-diffraction Block-copolymers Mechanical-properties Property Relationships Toluene Diisocyanate Model Compounds Behavior
英文摘要	Four chain extenders, 1,3-propanediol (PDO), 2-methyl-1,3-propanediol (MPO), 2,2-dimethyl-1,3-propanediol (NPG) and 2,2,4,4-tetramethyl-1,3-cyclobutanedio (CBDO) are chosen to synthesize model polyurethanes, respectively. Although with similar oxygen distance between the two hydroxyl groups, their volumes increase gradually according to computer simulation. As expected, the degree of microphase separation decreases with the increasing chain extender volume. Except for CBDO based polyurethane, the other three samples show systematic variations in mechanical properties. Various techniques including single-molecule force spectroscopy (SMFS), small-angle X-ray scattering (SAXS) and Fourier transform infrared spectroscopy (FTIR) are employed to investigate the structural changes after tensile break in different length scales. A picture of asynchronous fracture of microstructures during the tensile break of thermoplastic polyurethane elastomers can be obtained by the combination of different analytical methods. It is interesting to note that the macroscopic break may not affect the state of hydrogen bonding or the hard phase network. Sometimes, the hydrogen bonding state changes a lot while the phase network keeps almost the same, or vice versa. (C) 2018 Elsevier Ltd. All rights reserved.
学科主题	Polymer Science
语种	英语
公开日期	2018-12-04
内容类型	期刊论文
源URL	[http://ir.nimte.ac.cn/handle/174433/16796]
专题	2018专题
推荐引用方式 GB/T 7714	Li, Xing,Guo, Yaqian,Zhang, Ruoyu,et al. Asynchronous fracture of hierarchical microstructures in hard domain of thermoplastic polyurethane elastomer: Effect of chain extender[J]. POLYMER,2018,138:242-254.
APA	Li, Xing.,Guo, Yaqian.,Zhang, Ruoyu.,Xiao, Qiang.,Guo, Hongxia.,...&Zhu, Jin.(2018).Asynchronous fracture of hierarchical microstructures in hard domain of thermoplastic polyurethane elastomer: Effect of chain extender.POLYMER,138,242-254.
MLA	Li, Xing,et al."Asynchronous fracture of hierarchical microstructures in hard domain of thermoplastic polyurethane elastomer: Effect of chain extender".POLYMER 138(2018):242-254.