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- Title
Preparation of Highly Oriented Polyethylene Precursor Film with Fibril and Its Influence on Microporous Membrane Formation.
- Authors
Li, Xueyu; Meng, Lingpu; Lin, Yuanfei; Chen, Xiaowei; Zhang, Qianlei; Zhang, Rui; Wu, Lihui; Zhang, Wenhua; Li, Liangbin
- Abstract
Aiming to establish the relationship between structures of precursor film and its capability of pore formation, high density polyethylene (HDPE) precursor films are prepared under varied draw ratios and die temperatures, which are further subjected to stretching to generate microporous membranes. Structures like long period, lateral size of lamellae, orientation parameter, and fibril content of the precursor films are obtained by small/wide angle X-ray scattering (SAXS/WAXS), and morphologies of the microporous membranes are examined with scanning electron microscope. It is found that the content of fibrils and orientation parameter of lamellar stacks in the precursor films play counter effects on the capability of micropore formation. A critical window to balance the conflict is revealed with an optimal fibril content of about 6.4%, at which maximal porosity and most homogeneous porous structures are obtained. A schematic model is proposed to account for the role of the fibrils and the oriented lamellar stacks during pore formation, which may guide the production of high-performance HDPE microporous membranes.
- Subjects
HIGH density polyethylene; POLYETHYLENE; X-ray scattering; FIBRILLIN; SCANNING electron microscopes
- Publication
Macromolecular Chemistry & Physics, 2016, Vol 217, Issue 8, p974
- ISSN
1022-1352
- Publication type
Article
- DOI
10.1002/macp.201500471