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- Title
Crystallization and microporous membrane properties of ultrahigh molecular weight polyethylene with dibenzylidene sorbitol.
- Authors
Liu, Sijun; Zhao, Bin; He, Dannong
- Abstract
ABSTRACT Dibenzylidene sorbitol (DBS) was chosen as an in situ forming nucleating agent to study ultrahigh molecular weight polyethylene (UHMWPE) crystallization and microporous membrane. The experimental results indicated that DBS self-assembled into fibrils first and the solution became a physical gel before UHMWPE crystallization during thermally induced phase separation (TIPS) of UHMWPE/liquid paraffin (LP)/DBS solution, and the temperature of DBS self-assembly shows a strong dependence of DBS concentration. With decreasing temperature further, DBS fibrils as heterogeneous nucleating agent accelerated UHMWPE crystallization, which was showed more clearly in UHMWPE/LP/DBS phase diagram. UHMWPE microporous membranes were prepared through TIPS method with the control of DBS concentration. It was found that UHMWPE microporous membranes in the presence of DBS fibrils show small porous size and low water permeability, but relatively larger mechanical strength. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 40706.
- Subjects
CRYSTALLIZATION; ULTRAHIGH molecular weight polyethylene; BENZYLIDENE compounds; SORBITOL; POROUS materials; NUCLEATING agents; MOLECULAR self-assembly
- Publication
Journal of Applied Polymer Science, 2014, Vol 131, Issue 17, p8714
- ISSN
0021-8995
- Publication type
Article
- DOI
10.1002/app.40706