CAS OpenIR  > 中科院上海应用物理研究所2011-2020年
Lamellar orientation of polyamide 6 thin film crystallization on solid substrates
Zhong, LW; Ren, XK; Yang, S; Chen, EQ; Sun, CX; Stroeks, A; Yang, TY; eqchen@pku.edu.cn; alexander.stroeks@dsm.com
2014
Source PublicationPOLYMER
ISSN0032-3861
Volume55Issue:16Pages:4332—4340
AbstractWe studied the lamellar orientation of polyamide 6 (PA6) thin films with the thickness ranged from similar to 5 mu m to similar to 20 nm on different solid substrates. The lamellar morphology was observed using atomic force microscopy and transmission electron microscopy, and the lamellar orientation was characterized using two-dimensional (2D) grazing incidence wide-angle X-ray diffraction (GI-WAXD) and selected area electron diffraction (5AED). The 2D GI-WAXD results indicate that in the films thicker than similar to 50 nm PA6 lamellae of the alpha-form are preferentially edge-on with the ab-planes (b is the chain axis) parallel to the substrate. Decrease of film thickness leads to higher order of the orientation. This edge-on orientation is insensitive to the surface properties of the substrates changed from hydrophilic to hydrophobic, suggesting that the low energy hydrogen bonded sheets of PA6 are prone to lying down in the film. For the films on the hydrophilic substrate with thickness less than similar to 50 nm, the edge-on orientation remains. On the other hand, on a more hydrophobic substrate, flat-on lamellae can be detected by SAED when the film thickness is reduced to be less than 50 nm. An unexpected result is that in the similar to 30 nm-thick thin films the strong confinement effect can result in flat-on lamellae of PA6's gamma-form, although the crystallization temperature applied did not favor the gamma-form formation. We consider that in comparison with that of the alpha-form lamellae with a lath-like shape, the growth of more symmetrical lamellae of the gamma-form with large lateral dimensions can reduce more the free energy of the very thin film. (C) 2014 Elsevier Ltd. All rights reserved.
KeywordAtomic-force Microscopy X-ray-diffraction Low-density Polyethylene Ultrathin Films Crystal-structure Polymer-films Quantitative Information Isotactic Polypropylene Nylon-6 Yarns Growth Shape
Indexed BySCI
Language英语
WOS IDWOS:000340812300116
Citation statistics
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/14213
Collection中科院上海应用物理研究所2011-2020年
Corresponding Authoreqchen@pku.edu.cn; alexander.stroeks@dsm.com
Recommended Citation
GB/T 7714
Zhong, LW,Ren, XK,Yang, S,et al. Lamellar orientation of polyamide 6 thin film crystallization on solid substrates[J]. POLYMER,2014,55(16):4332—4340.
APA Zhong, LW.,Ren, XK.,Yang, S.,Chen, EQ.,Sun, CX.,...&alexander.stroeks@dsm.com.(2014).Lamellar orientation of polyamide 6 thin film crystallization on solid substrates.POLYMER,55(16),4332—4340.
MLA Zhong, LW,et al."Lamellar orientation of polyamide 6 thin film crystallization on solid substrates".POLYMER 55.16(2014):4332—4340.
Files in This Item: Download All
File Name/Size DocType Version Access License
Lamellar orientation(2894KB) 开放获取CC BY-NC-SAView Download
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Zhong, LW]'s Articles
[Ren, XK]'s Articles
[Yang, S]'s Articles
Baidu academic
Similar articles in Baidu academic
[Zhong, LW]'s Articles
[Ren, XK]'s Articles
[Yang, S]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Zhong, LW]'s Articles
[Ren, XK]'s Articles
[Yang, S]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: Lamellar orientation of polyamide 6 thin film crystallization on solid substrates.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.