Kinetics of the iodine transfer polymerization of vinylidene fluoride

2006 ◽  
Vol 44 (19) ◽  
pp. 5763-5777 ◽  
Author(s):  
Cyrille Boyer ◽  
David Valade ◽  
Patrick Lacroix-Desmazes ◽  
Bruno Ameduri ◽  
Bernard Boutevin
Keyword(s):  
Vinylidene Fluoride ◽  
Iodine Transfer ◽  
Kinetics Of

Simulations of High-Strain Electrostrictive Chlorinated Terpolymers

2003 ◽  
Vol 785 ◽  
Author(s):  
George J. Kavarnos ◽  
Thomas Ramotowski
Keyword(s):  
Vinylidene Fluoride ◽  
High Strain ◽  
Polymer Chains ◽  
X Ray Diffraction ◽  
X Ray ◽  
Lamellar Structures ◽  
Annealing Conditions ◽  
Poly Vinylidene Fluoride ◽  
Electromechanical Responses ◽  
Kinetics Of

ABSTRACTChlorinated poly(vinylidene fluoride/trifluoroethylene) terpolymers are remarkable examples of high strain electrostrictive materials. These polymers are synthesized by copolymerizing vinylidene fluoride and trifluoroethylene with small levels of a third chlorinated monomer. The electromechanical responses of these materials are believed to originate from the chlorine atom, which, by its presence in the polymer chains and by virtue of its large van der Waals radius, destroys the long-range crystalline polar macro-domains and transforms the polymer from a normal to a high-strain relaxor ferroelectric. To exploit the strain properties of the terpolymer, it is desirable to understand the structural implications resulting from the presence of the chlorinated monomer. To this end, computations have been performed on model superlattices of terpolymers using quantum-mechanical based force fields. The focus has been on determining the energetics and kinetics of crystallization of the various polymorphs that have been identified by x-ray diffraction and fourier transform infrared spectroscopy. The chlorinated monomer is shown to act as a defect that can be incorporated into the lamellar structures of annealed terpolymer without a high cost in energy. The degree of incorporation of the chlorinated monomer into the crystal lattice is controlled by annealing conditions and ultimately determines the ferroelectric behavior of the terpolymers.

Iodine transfer emulsion polymerizations of vinylidene fluoride

2020 ◽  
pp. 49-68
Author(s):  
Florian Brandl ◽  
Jan Schwaderer ◽  
Marco Drache ◽  
Sabine Beuermann
Keyword(s):  
Vinylidene Fluoride ◽  
Iodine Transfer ◽  
Emulsion Polymerizations

Molecular weight dependent of the crystallization kinetics of poly(vinylidene fluoride)

1992 ◽  
Vol 32 (17) ◽  
pp. 1300-1308 ◽  
Author(s):  
Sophie Roussel ◽  
Kathy Lynn McElroy ◽  
Lawrence H. Judovits
Keyword(s):  
Molecular Weight ◽  
Crystallization Kinetics ◽  
Vinylidene Fluoride ◽  
Poly Vinylidene Fluoride ◽  
Kinetics Of

Kinetic and mechanistic aspects of the iodine transfer copolymerization of vinylidene fluoride with 2,3,3,3-tetrafluoro-1-propene and functionalization into ω-hydroxy fluorinated copolymers

2016 ◽  
Vol 7 (39) ◽  
pp. 6099-6109 ◽  
Author(s):  
Sanjib Banerjee ◽  
Saad Zaghloul ◽  
Ali Alaaeddine ◽  
Bruno Ameduri
Keyword(s):  
Vinylidene Fluoride ◽  
Water Based ◽  
Poly Vinylidene Fluoride ◽  
Iodine Transfer ◽  
Fluorinated Copolymers

ω-Hydroxy functionalized poly(vinylidene fluoride) prepared in a water-based non-fluorinated solvent by iodine transfer copolymerization VDF and 1234yf.

scholarly journals Fluoroalkyl Pentacarbonylmanganese(I) Complexes as Initiators for the Radical (co)Polymerization of Fluoromonomers

Polymers ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 384 ◽  
Author(s):  
Roberto Morales-Cerrada ◽  
Vincent Ladmiral ◽  
Florence Gayet ◽  
Christophe Fliedel ◽  
Rinaldo Poli ◽  
...  
Keyword(s):  
Visible Light ◽  
Polyvinylidene Fluoride ◽  
Vinylidene Fluoride ◽  
Degree Of Crystallinity ◽  
End Groups ◽  
Radical Initiators ◽  
Alternating Copolymerization ◽  
Kinetics Of ◽  
The Degree Of Crystallinity ◽  
Moderate Yield

The use of [Mn(RF)(CO)5] (RF = CF3, CHF2, CH2CF3, COCF2CH3) to initiate the radical polymerization of vinylidene fluoride (F2C=CH2, VDF) and the radical alternating copolymerization of vinyl acetate (CH2=CHOOCCH3, VAc) with tert-butyl 2-(trifluoromethyl)acrylate (MAF-TBE) by generating primary RF• radicals is presented. Three different initiating methods with [Mn(CF3)(CO)5] (thermal at ca. 100 °C, visible light and UV irradiations) are described and compared. Fair (60%) to satisfactory (74%) polyvinylidene fluoride (PVDF) yields were obtained from the visible light and UV activations, respectively. Molar masses of PVDF reaching 53,000 g·mol−1 were produced from the visible light initiation after 4 h. However, the use of [Mn(CHF2)(CO)5] and [Mn(CH2CF3)(CO)5] as radical initiators produced PVDF in a very low yield (0 to 7%) by both thermal and photochemical initiations, while [Mn(COCF2CH3)(CO)5] led to the formation of PVDF in a moderate yield (7% to 23%). Nevertheless, complexes [Mn(CH2CF3)(CO)5] and [Mn(COCHF2)(CO)5] efficiently initiated the alternating VAc/MAF-TBE copolymerization. All synthesized polymers were characterized by 1H and 19F NMR spectroscopy, which proves the formation of the expected PVDF or poly(VAc-alt-MAF-TBE) and showing the chaining defects and the end-groups in the case of PVDF. The kinetics of VDF homopolymerization showed a linear ln[M]0/[M] versus time relationship, but a decrease of molar masses vs. VDF conversion was noted in all cases, which shows the absence of control. These PVDFs were rather thermally stable in air (up to 410 °C), especially for those having the highest molar masses. The melting points ranged from 164 to 175 °C while the degree of crystallinity varied from 44% to 53%.

Iodine Transfer Terpolymerization of Vinylidene Fluoride, α-Trifluoromethacrylic Acid and Hexafluoropropylene for Exceptional Thermostable Fluoropolymers/Silica Nanocomposites

2011 ◽  
Vol 44 (5) ◽  
pp. 1114-1124 ◽  
Author(s):  
Hideo Sawada ◽  
Tsukasa Tashima ◽  
Yusuke Nishiyama ◽  
Mieko Kikuchi ◽  
Yuki Goto ◽  
...  
Keyword(s):  
Vinylidene Fluoride ◽  
Silica Nanocomposites ◽  
Iodine Transfer
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