Shifting of the melting point for semi-crystalline polymer nanofibers

被引：26

作者：

Arinstein, A. ^{[1
]}

Liu, Y. ^{[2
]}

Rafailovich, M. ^{[2
]}

Zussman, E. ^{[1
]}

机构：

[1] Technion Israel Inst Technol, Dept Mech Engn, IL-32000 Haifa, Israel

[2] SUNY Stony Brook, Dept Mat Sci & Engn, Stony Brook, NY 11794 USA

来源：

EPL | 2011年 / 93卷 / 04期

基金：

美国国家科学基金会;

关键词：

RESTRICTED GEOMETRY; BEHAVIOR; DYNAMICS; FILMS;

D O I：

10.1209/0295-5075/93/46001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The depression of melting temperature as a function of the diameter of electrospun semi-crystalline polymer nanofibers is discussed. Due to fast solvent evaporation during nanofiber electrospinning, there occurs the fixation of topological structure of the polymer matrix corresponding to chain entanglement of the initial concentration of the semi-dilute solution. The resulting level of chain entanglement is lower than that in polymer bulk at equilibrium. This difference results in an addition to the entropy jump corresponding to the polymer's melting, and accounts for the observed shift in melting temperature in as-spun fibers. The proposed concept is found to be in good agreement with experimental results obtained for as-spun poly(ethylene-covinyl acetate) (PEVA) and low-density polyethylene (LDPE) fibers. Copyright (C) EPLA, 2011

引用

页数：6

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