α-to-β transformation on PVDF films obtained by uniaxial stretch

被引：94
作者：
Sencadas, V
Moreira, VM
Lanceros-Mendéz, S
Pouzada, AS
Gregório, R
机构：
[1] Univ Fed Sao Carlos, Dept Mat Engn, BR-13565905 Sao Carlos, SP, Brazil
[2] Univ Minho, Dept Fis, P-4710058 Braga, Portugal
[3] Univ Minho, IPC, Dept Polymer Engn, Guimaraes, Portugal
来源：
ADVANCED MATERIALS FORUM III, PTS 1 AND 2 | 2006年 / 514-516卷
关键词：
ferroelectrics; polymers; PVDF; mechanical properties; FTIR; SEM;
D O I：
10.4028/www.scientific.net/MSF.514-516.872
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The alpha to beta phase transformation of PVDF through the stretching process at different temperatures was investigated. The optimum stretching conditions were studied and characterised by infrared spectroscopy and differential scanning calorimetry. The maximum P-phase content was achieved at 80 degrees C and a stretch ratio of 5. Accompanying the phase transformation, a orientation of the polymer chains and a packing of the crystalline structure is observed. The stretch ratio does not significantly affect the degree of crystallinity.
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页码：872 / 876
页数：5
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