Thermoreversible Gelation of Poly(vinylidene fluoride) – Camphor System | Zendy

Dasgupta D. | Zendy; Manna Swarup | Zendy; Malik Sudip | Zendy; Rochas Cyrille | Zendy; Guenet Jean Michel | Zendy; Nandi A.K. | Zendy

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Thermoreversible Gelation of Poly(vinylidene fluoride) – Camphor System

Author(s) -

Dasgupta D.,

Manna Swarup,

Malik Sudip,

Rochas Cyrille,

Guenet Jean Michel,

Nandi A.K.

Publication year - 2005

Publication title -

macromolecular symposia

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.257

H-Index - 76

eISSN - 1521-3900

pISSN - 1022-1360

DOI - 10.1002/masy.200550422

Subject(s) - camphor , phase diagram , materials science , monomer , fluoride , polymer chemistry , stoichiometry , solvent , phase (matter) , enthalpy , polymer , chemical engineering , chemistry , thermodynamics , composite material , organic chemistry , inorganic chemistry , physics , engineering

Poly (vinylidene fluoride) (PVF 2 ) produces thermoreversible gel in camphor when quenched to 25°C from the melt under sealed condition. The SEM micrograph of dried PVF 2 /camphor gel (W PVF 2= 0.25) indicates presence of fibrillar network structure and the gels at different composition shows reversible first order phase transition. The phase diagram of the gel suggest the formation of a polymer‐ solvent complex. The melting enthalpy gives a stoichiometric composition of the complex at W PVF 2= 0.25. This corresponds to a molar ratio of PVF 2 monomer/camphor ≈ 4/5. Temperature‐dependent synchroton experiments further support the conclusions derived from the phase diagram.

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