PDMS/cellulose acetate butyrate

The features and detail of the IPN kinetics were also studied in other works [274-276]. The kinetics of thermally initiated cationic epoxy polymerization and free radical acrylate photopolymerization were investigated in [277]. It was found that the preexistence of one polymer has a significant effect on the polymerization of the second monomer. The reaction kinetics and phase separations were studied for sequential IPNs in [278]. The kinetics of IPN formation was studied for IPNs based on PDMS-cellulose acetate butyrate [279]. All these and other works [280-282] confirm the general regularities of the reaction kinetics and its connection with phase separation in forming systems. 

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. 

PDMS has been combined with a number of other polymers to form IPNs. Examples involve cellulose acetate butyrate,fiuorinated acry-... 

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. ... 

APTMOS 3-amino-propyl-trimethoxysilane, AuHFA fluoroalcohol-coated gold nanospheres, BBCB bisbenzocy-clobutene, BCB benzocyclobutene, CA cellulose acetate, CAB cellulose acetate-butyrate, CEE chloroethyl ether, DIMP diisopropyl methylphosphonate, DMMP dimethyl methylphosphonate, EPR epoxidized novolac, IPA isopropanol, OV-225 cyanopropyl methyl phenylmethyl silicone, OV-275 dicyanoallyl sihcone, PAAM polyallylamine hydrochloride, PAPPS propylaminopropyl polysiloxane, PDMS poly(dimethylsiloxane), PECH polyepichlorohydrin, PEG polyethylene glycol, PEI polyethyleneimine, PEO polyethylene oxide, PEVA polyethylene-co-vinyl acetate, PEUT poly(ether urethane), PHEMA poly(2-hydroxyethyl methacrylate), PIB polyisobutylene, PMMA poly(methyl methacrylate), PTMOS propyltrimethoxysilane, PVA polyvinyl alcohol, PVP polyvinylpyrrolidone, SXFA siloxanefluoroalcohol... 

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