Inter-penetrating network

Karaaslan, A.M. Tshabalala, M.A. Buschle-Diller, G. Wood hemicellulose/chitosan-based semi-inter-penetrating network hydrogels Mechanical, swelling and controlled drug release properties. BioRes 2010, 5 (2), 1036-1054. 

Novel and smart soft materials like polymer and colloidal gels, glasses, inter penetrating network structures (IPNS) and poly electrolyte complexes (coacer-vates) have generated adequate interest in the recent past due to their enormous... 

We have provided several examples of intermolecular complex formation that has led to coacervation. In the past coacervate samples were probed by an array of techniques in order to determine the details of their micro-structure. The experimental results taken together reveals that the coacervate phase is a heterogeneous viscous material. The polymer-rich phase comprises physically crosslinked networks of constituent biomolecules. The presence of inter-penetrating networks of... 

IPN (inter penetrate network) structures Developing of molecular chains penetrating each other can improve the resistance of cured bulk materials due to the stress relaxation. For instance, elastic adhesives have IPN structures comprising an epoxy backbone and modified silicone molecular chains. 

One of these blends is used for preparation of simultaneous inter-penetrating networks (IPNs). The major requirement that these blends should satisfy is that the functional groups of each oligomer in the pair interact by different reactions this must, therefore, eliminate the reactions between different chains [86-90]. 

Exceptionally high relative selectivities are reported for sPOSS = 8.3) [144], PVdF (fir = 20) [119, 120], PANI-coated Nafion (fi = 8.0) [126], and semi-inter penetrating polymer networks of Nafion and crossfinked poly(AMPS) (fir = 16) [152],... 

Garoushi, S., Vallittu, P.K., and Lassila, LV.J. (2007) Short glass fiber reinforced restorative composite resin with semi-inter penetrating polymer network matrix. Dent. Mater., 23, 1356-1362. 

Brovko A A, Fainleib A M, Shantalii T A, Sergeeva L M and Davidenko V V (1994) Structure and viscoelastic properties of polycyanurate-polyurethane semi-inter-penetrating polymer networks, Polym Sci 36 934-938. 

Heterogeneous polymeric sterns on the basis of two polymers can be also realized in the form of interpenetrating polymeric networks 155,156). Such systems are interesting in that they consist of two continuous, not chemically inter-connecting polymeric networks which cannot be separated because of mutual penetration of segments of one network into the cells of the other. The appearance in IPN of a transitional region caused by the incompatibility of the components increases the heterr neity of such systems and can be noted on their viscoelastic properties (157). 

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