Thermoreversible gelation of poly(vinylidene fluoride) - camphor system

Dasgupta, D. ; Manna, Swarup ; Malik, Sudip ; Rochas, Cyrille ; Guenet, Jean Michel ; Nandi, A. K. (2005) Thermoreversible gelation of poly(vinylidene fluoride) - camphor system Macromolecular Symposia, 222 (1). pp. 175-180. ISSN 1022-1360

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Poly (vinylidene fluoride) (PVF2) produces thermoreversible gel in camphor when quenched to 25°C from the melt under sealed condition. The SEM micrograph of dried PVF2/camphor gel (WPVF2= 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 WPVF2= 0.25. This corresponds to a molar ratio of PVF2 monomer/camphor ≈ 4/5. Temperature-dependent synchroton experiments further support the conclusions derived from the phase diagram.

Item Type:Article
Source:Copyright of this article belongs to John Wiley and Sons.
Keywords:Camphor; Phase Diagram; Polymer Solvent Complex; Poly (vinylidene Fluoride); Thermoreversible Gel
ID Code:85343
Deposited On:02 Mar 2012 05:31
Last Modified:02 Mar 2012 05:31

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