ICCAS OpenIR
Shear-Induced Crystallization at Polymer-Substrate Interface: The Slippage Hypothesis
Shen, Bo1,2; Liang, Yongri1; Zhang, Chenggui1; Han, Charles C.1
2011-09-13
Source PublicationMACROMOLECULES
ISSN0024-9297
Volume44Issue:17Pages:6919-6927
AbstractWhen a shear-induced crystallization of polymers was formed between a pair of rotating plates, there existed two possibilities in forming this shear-induced crystal: one is that the shish-kebab formed is uniformly distributed in the bulk polymer melt, and the other is that it appears only on both sides of polymer-substrate interfaces. Since the mechanism of each scenario depends on the boundary conditions of the experiment, we mainly focus on the second scenario in this study and will discuss why and when the shish-kebab grows on the polymer-substrate interfaces. Through the ex-situ polarized optical images of flow-velocity gradient plane, velocity gradient-vorticity plane, and flow-vorticity plane combined with in situ phase contrast optical images and attenuated total reflection (ATR) Fourier transformed infrared spectrum, we are able to infer how shish-kebab is distributed in the bulk. We conjectured that wall slip might be the most possible and reasonable origin for the formation of the shish-kebab on the interface which leads to the two different scenarios mentioned above. This is confirmed by the results from the shear rate dependence experiment. Shear time dependence experiment is also made to study the long shear time effect. By carefully cleaning the quartz plate used for shear experiment and comparing with the results obtained from uncleaned quartz plate, we further testified our point of view and led to some physical understanding for the formation of the shish-kebab as well as the wall slip mechanism.
DOI10.1021/ma200559f
Indexed BySCI
Language英语
WOS IDWOS:000294585600037
PublisherAMER CHEMICAL SOC
Citation statistics
Cited Times:11[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/72446
Collection中国科学院化学研究所
Corresponding AuthorHan, Charles C.
Affiliation1.Chinese Acad Sci, State Key Lab Polymer Phys & Chem, Joint Lab Polymer Sci & Mat, Beijing Natl Lab Mol Sci,Inst Chem, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Shen, Bo,Liang, Yongri,Zhang, Chenggui,et al. Shear-Induced Crystallization at Polymer-Substrate Interface: The Slippage Hypothesis[J]. MACROMOLECULES,2011,44(17):6919-6927.
APA Shen, Bo,Liang, Yongri,Zhang, Chenggui,&Han, Charles C..(2011).Shear-Induced Crystallization at Polymer-Substrate Interface: The Slippage Hypothesis.MACROMOLECULES,44(17),6919-6927.
MLA Shen, Bo,et al."Shear-Induced Crystallization at Polymer-Substrate Interface: The Slippage Hypothesis".MACROMOLECULES 44.17(2011):6919-6927.
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