Phase transition in ultrathin ferroelectric poly(vinylidene fluoride) films

被引：0
|
作者：
Levshin, NL
Yudin, SG
机构：
[1] Moscow MV Lomonosov State Univ, Fac Phys, Moscow 119992, Russia
[2] Russian Acad Sci, Inst Crystallog, Moscow 119333, Russia
来源：
POLYMER SCIENCE SERIES B | 2004年 / 46卷 / 11-12期
关键词：
D O I：
暂无
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Ultrathin poly(vinylidene fluoride) (PVDF) films prepared by the Langmuir-Schaffer method were investigated. By measuring adsorption isotherms of water molecules on the film surface, it was shown that the adsorption capacity of the films has a maximum in the vicinity of 335 K, which is indicative of the existence of a structural phase transition in this temperature range. This transition was not observed previously; it takes place only in films of 7-11 monolayers (5-8 nm) in thickness and disappears when the film attains a thickness of 30-40 monolayers.
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页码：348 / 351
页数：4
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