Crystal Orientation and Temperature Effects on Double Hysteresis Loop Behavior in a Poly(vinylidene fluoride-co-trifluoroethylene-co-chlorotrifluoroethylene)-graft-Polystyrene Graft Copolymer

2013 ◽  
Vol 46 (24) ◽  
pp. 9698-9711 ◽  
Author(s):  
Lianyun Yang ◽  
Elshad Allahyarov ◽  
Fangxiao Guan ◽  
Lei Zhu
Keyword(s):  
Hysteresis Loop ◽  
Graft Copolymer ◽  
Temperature Effects ◽  
Crystal Orientation ◽  
Vinylidene Fluoride ◽  
Poly Vinylidene Fluoride ◽  
Double Hysteresis Loop

scholarly journals Tuning the dielectric behavior of poly(vinylidene fluoride-co-vinyl alcohol) using a facile urethane-based crosslinking method

2019 ◽  
Vol 10 (11) ◽  
pp. 1335-1343 ◽  
Author(s):  
Niels L. Meereboer ◽  
Ivan Terzić ◽  
Katja Loos
Keyword(s):  
Hysteresis Loop ◽  
Vinyl Alcohol ◽  
Vinylidene Fluoride ◽  
Crosslinking Density ◽  
Dielectric Behavior ◽  
Poly Vinylidene Fluoride ◽  
Double Hysteresis Loop

Crosslinking poly(VDF-co-VA) copolymers leads to a change from ferroelectric to double hysteresis loop behavior when the crosslinking density is increased.

Reactive Amphiphilic Graft Copolymer Coatings Applied to Poly(vinylidene fluoride) Ultrafiltration Membranes

2007 ◽  
Vol 40 (10) ◽  
pp. 3624-3630 ◽  
Author(s):  
Ravindra Revanur ◽  
Bryan McCloskey ◽  
Kurt Breitenkamp ◽  
Benny D. Freeman ◽  
Todd Emrick
Keyword(s):  
Graft Copolymer ◽  
Vinylidene Fluoride ◽  
Ultrafiltration Membranes ◽  
Amphiphilic Graft Copolymer ◽  
Poly Vinylidene Fluoride

scholarly journals Membranes for the Capture and Screening of Waterborne Plutonium Based on a Novel Pu-Extractive Copolymer Additive

Membranes ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 3
Author(s):  
James C. Foster ◽  
Timothy A. DeVol ◽  
Scott M. Husson
Keyword(s):  
Graft Copolymer ◽  
Alpha Spectrometry ◽  
Vinylidene Fluoride ◽  
Surface Migration ◽  
Peak Energy ◽  
Poly Vinylidene Fluoride ◽  
Dope Solution ◽  
Entire Depth ◽  
Flow Filtration ◽  
Poly Ethylene

This contribution describes the fabrication of plutonium-adsorptive membranes by non-solvent induced phase separation. The dope solution comprised poly(vinylidene fluoride) (PVDF) and a Pu-extractive copolymer additive of PVDF-g-poly(ethylene glycol methacrylate phosphate) (EGMP) in dimethylformamide (DMF). The effects of casting conditions on membrane permeability were determined for PVDF membranes prepared with 10 wt% PVDF-g-EGMP. Direct-flow filtration and alpha spectrometry showed that membranes containing the graft copolymer could recover Pu up to 59.9 ± 3.0% from deionized water and 19.3 ± 3.5% from synthetic seawater after filtering 10 mL of 0.5 Bq/mL 238Pu. SEM-EDS analysis indicated that the graft copolymer was distributed evenly throughout the entire depth of the copolymer membranes, likely attributing to the tailing observed in the alpha spectra for 238Pu. Despite the reduction in resolution, the membranes exhibited high Pu uptake at the conditions tested, and new membrane designs that promote copolymer surface migration are expected to improve alpha spectrometry peak energy resolutions. Findings from this study also can be used to guide the development of extractive membranes for chromatographic separation of actinides from contaminated groundwater sources.

Zwitterionic Poly(vinylidene fluoride) Graft Copolymer with Unexpected Fluorescence Property

Langmuir ◽  
2019 ◽  
Vol 35 (16) ◽  
pp. 5525-5533 ◽  
Author(s):  
Mahuya Pakhira ◽  
Radhakanta Ghosh ◽  
Santi P. Rath ◽  
Dhruba P. Chatterjee ◽  
Arun K. Nandi
Keyword(s):  
Graft Copolymer ◽  
Vinylidene Fluoride ◽  
Fluorescence Property ◽  
Poly Vinylidene Fluoride
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