Cellulose acetate butyrate network

Abstract This article summarizes a large amount of work carried out in our laboratory on polysiloxane based Interpenetrating Polymer Networks (IPNs). First, a polydimethylsiloxane (PDMS) network has been combined with a cellulose acetate butyrate (CAB) network in order to improve its mechanical properties. Second, a PDMS network was combined with a fluorinated polymer network. Thanks to a perfect control of the respective rates of formation of each network it has been possible to avoid polymer phase separation during the IPN synthesis. Physicochemical analyses of these materials led to classify them as true IPNs according to Sperling s definition. In addition, synergy of the mechanical properties, on the one hand, and of the surface properties, on the other hand, was displayed. 

First, PDMS network was combined to a cellulose acetate butyrate (CAB) network into an IPN architecture in order to improve the thermomechanical properties of PDMS network (Scheme 1). The linear CAB can be cross-linked through its free OH groups with a Desmodur N3300 pluri-isocyanate. The alcohol/isocyanate reaction is catalyzed by DBTDL leading to urethane cross-links. Simultaneously, PDMS oligomers must be cross-linked independently in order to form the PDMS network. In order to carry out independent cross-linking reactions. 

Fichet O, Vidal F, Laskar J, Teyssie D. (2005) Polysiloxane - Cellulose Acetate Butyrate Interpenetrating Polymer Networks - Synthesis and kinetic formation study. Part 1. Polymer 46 37 7... 

Fichet, O. Vidal, F. Laskar, J. Teyssie, D., Polydimethylsiloxane-Cellulose Acetate Butyrate Interpenetrating Polymer Networks Synthesis and Kinetic Study. Part I. Polymer 2005,46, 37-47. 

Other examples involving PDMS as one of the networks involve epox-ies 138,139 cellulose acetate butyrate,polycarbonate,poly(vinyl al-cohol), acrylates, fluorinated acrylate, N-vinyl-2-pyrrolidone, and methacrylate/acrylamides. ... 

Vidal F, Fichet O, Laskar J, Teyssie D. (2006) Polysiloxane - acetate butyrate cellulose Interpenetrating Polymers Networks close to true IPNs on a large composition range. Part II. Polymer 47 3747-53... 

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