Patterned ferro-, pyro- and piezoelectricity in poly(vinylidene fluoride) by means of a laser-induced irreversible β→α phase transformation

2002 ◽  
Vol 91 (5) ◽  
pp. 3193-3196 ◽  
Author(s):  
M. Wegener ◽  
J. Hesse ◽  
T. Wegener ◽  
R. Gerhard-Multhaupt
Keyword(s):  
Phase Transformation ◽  
Vinylidene Fluoride ◽  
Α Phase ◽  
Poly Vinylidene Fluoride

Analysis of the crystalline phase transformation of poly(vinylidene fluoride)

1985 ◽  
Vol 18 (12) ◽  
pp. 2583-2587 ◽  
Author(s):  
S. L. Hsu ◽  
F. J. Lu ◽  
D. A. Waldman ◽  
M. Muthukumar
Keyword(s):  
Phase Transformation ◽  
Crystalline Phase ◽  
Vinylidene Fluoride ◽  
Poly Vinylidene Fluoride

Influence of Evaporation Temperature on the Morphology, Polymorph and Mechanical Properties of Poly(vinylidene fluoride) Solution-Cast Membranes

2014 ◽  
Vol 1015 ◽  
pp. 536-539
Author(s):  
Jie Liu ◽  
Ji Ding Li ◽  
Xiao Long Lu
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Vinylidene Fluoride ◽  
Dense Structure ◽  
Fluoride Solution ◽  
Evaporation Temperature ◽  
Α Phase ◽  
Poly Vinylidene Fluoride ◽  
Solution Cast ◽  
Solution Cast Method

In this study, PVDF membranes were prepared by solution-cast method. The effects of evaporation temperature on the morphology, polymorph and mechanical properties of such prepared membranes were studied. It was found that perfect spherulites were observed in the solution-cast membranes. FESEM photomicrographs of the membranes showed dense structure. PVDF mainly crystallized into α phase. In the solution-cast process, the spherulite size increased as evaporation temperature was increased from 120 °C to 150 °C, when the evaporation temperature was 165 °C, spherulite size decreased. And the tensile strength increased with the decrease in spherulite size.

The dependence of the β-to-α phase transition behavior of poly(1,4-butylene adipate) on phase separated morphology in its blends with poly(vinylidene fluoride)

2018 ◽  
Vol 20 (23) ◽  
pp. 15718-15724 ◽  
Author(s):  
Chunyue Hou ◽  
Huihui Li ◽  
Xiaoli Sun ◽  
Shouke Yan ◽  
Yanfang Wang ◽  
...  
Keyword(s):  
Phase Transition ◽  
Vinylidene Fluoride ◽  
Phase Transition Behavior ◽  
Transition Behavior ◽  
Α Phase ◽  
Poly Vinylidene Fluoride ◽  
The Stability

Two kinds of typical phase separated morphologies are prepared and they alter the stability of crystals.

Dynamics of the field-induced transition to the polar α phase of poly(vinylidene fluoride)

1980 ◽  
Vol 51 (10) ◽  
pp. 5184 ◽  
Author(s):  
H. Dvey-Aharon ◽  
P. L. Taylor ◽  
A. J. Hopfinger
Keyword(s):  
Vinylidene Fluoride ◽  
Α Phase ◽  
Poly Vinylidene Fluoride

Preparation of poly(vinylidene fluoride)-silver nanoparticle composite using dimethylformide as both a solvent and a reductant

e-Polymers ◽  
2011 ◽  
Vol 11 (1) ◽  
Author(s):  
Yingbo Chen ◽  
Lina Liu ◽  
Yufeng Zhang
Keyword(s):  
Mechanical Properties ◽  
Silver Nanoparticles ◽  
Silver Nanoparticle ◽  
Vinylidene Fluoride ◽  
Silver Salt ◽  
Α Phase ◽  
Phase Crystal ◽  
Poly Vinylidene Fluoride ◽  
Pure Pvdf

AbstractPoly(vinylidene fluoride)-silver nanoparticle (PVDF-Ag) composites were synthesized by in situ reduction of silver salt using dimethylformide (DMF) as both a solvent and a reductant. The crystalline properties (e.g., crystallinity and the types of crystals) of the composites were characterized. It was shown that PVDF in the composites had a higher melting temperature than pure PVDF, and the α phase crystal in the composites became more stable with an increase in the amount of silver nanoparticles. The mechanical properties and morphologies of the composites were also investigated. It was noted that the PVDF-Ag composites have better mechanical properties when silver nanoparticles were added. The increase in toughness could be attributed to the formation of continuous structure between PVDF and silver particles.

Composition dependent phase transformation of poly(vinylidene fluoride) in its miscible blends upon stretching

RSC Advances ◽  
2014 ◽  
Vol 4 (74) ◽  
pp. 39491 ◽  
Author(s):  
Ming Yin ◽  
Yun Zhu ◽  
Ruihua Lv ◽  
Bing Na ◽  
Qingxian Liu
Keyword(s):  
Phase Transformation ◽  
Vinylidene Fluoride ◽  
Miscible Blends ◽  
Poly Vinylidene Fluoride
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