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Divergent Shear Thinning and Shear Thickening Behavior of Supramolecular Polymer Networks in Semidilute Entangled Polymer Solutions
Xu, Donghua1,2; Liu, Chen-Yang3; Craig, Stephen L.1,2
2011-04-12
Source PublicationMACROMOLECULES
ISSN0024-9297
Volume44Issue:7Pages:2343-2353
AbstractThe steady shear behavior of metallo-supramolecular polymer networks formed by bis-Pd(II) cross-linkers and semidilute entangled solutions of poly(4-vinylpyridine) (PVP) in dimethyl sulfoxide (DMSO) or N,N-dimethylformamide (DMF) is reported. The steady shear behavior of the networks depends on the dissociation rate and association rate of the cross-linkers, the concentration of cross-linkers, and the concentration of the polymer solution. The divergent steady shear behavior-shear thinning versus shear thickening-of samples with identical structure but different cross-linker dynamics [J. Phys. Chem. Lett. 2010, 1, 1683-1686] is further explored in this paper. The divergent steady shear behavior for networks with different cross-linkers is connected to a competition between different time scales: the average time that a cross-linker remains open (tau(1)) and the local relaxation time of a segment of polymer chain (tau(segment)). When tau(1), is larger than tau(segment), shear thickening is observed. When tau(1), is smaller than tau(segment), only shear thinning is observed.
DOI10.1021/ma2000916
Indexed BySCI
Language英语
WOS IDWOS:000289028500079
PublisherAMER CHEMICAL SOC
Citation statistics
Cited Times:43[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/72900
Collection中国科学院化学研究所
Corresponding AuthorCraig, Stephen L.
Affiliation1.Duke Univ, Dept Chem, Durham, NC 27708 USA
2.Duke Univ, Ctr Biologically Inspired Mat & Mat Syst, Durham, NC 27708 USA
3.Chinese Acad Sci, Inst Chem, CAS Key Lab Engn Plast, Joint Lab Polymer Sci & Mat, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Xu, Donghua,Liu, Chen-Yang,Craig, Stephen L.. Divergent Shear Thinning and Shear Thickening Behavior of Supramolecular Polymer Networks in Semidilute Entangled Polymer Solutions[J]. MACROMOLECULES,2011,44(7):2343-2353.
APA Xu, Donghua,Liu, Chen-Yang,&Craig, Stephen L..(2011).Divergent Shear Thinning and Shear Thickening Behavior of Supramolecular Polymer Networks in Semidilute Entangled Polymer Solutions.MACROMOLECULES,44(7),2343-2353.
MLA Xu, Donghua,et al."Divergent Shear Thinning and Shear Thickening Behavior of Supramolecular Polymer Networks in Semidilute Entangled Polymer Solutions".MACROMOLECULES 44.7(2011):2343-2353.
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