Semi interpenetrating polymer networks

Davis, P. A. Nicolais, L., Ambrosio, L., and Huang, S. J., Synthesis and characterization of semi-interpenetrating polymer networks of poly(2-hydroxyethyl methacrylate) and poly(capro-lactone), Polym. Mater. Sci. Eng., 56, 536-540, 1987. 

Note Semi-interpenetrating polymer networks are distinguished from interpenetrating polymer networks because the constituent linear or branched polymer can, in principle, be separated from the constituent polymer network(s) without breaking chemical bonds they are polymer blends. 

Note 2 Semi-interpenetrating polymer networks may be further described by the process by which they are synthesized. When an SIPN is prepared by a process in which the second component polymer is formed or incorporated following the completion of formation of the first component polymer, the SIPN may be referred to as a sequential SIPN. When an SIPN is prepared by a process in which both component polymers are formed concurrently, the SIPN may be referred to as a simultaneous SIPN. (This note has been changed from that which appears in ref [4] to allow for the possibility that a linear or branched polymer may be incorporated into a network by means other than polymerization, e.g., by swelling of the network and subsequent diffusion of the linear or branched chain into the network.). 

Semi-interpenetrating polymer network prepared by a process in which the linear or branched components are formed following the completion of the reactions that lead to the formation of the network(s) or vice versa. 

Semi-interpenetrating polymer network Interpenetrating polymer network Polymer-polymer complex... 

Assemblies of macromolecules include polymer blends, semi-interpenetrating polymer networks, network polymers, interpenetrating polymer networks and polymer—polymer complexes. 

Kudaibergenov SE, Dolya NA, Tatykhanova GS et al (2007) Semi-interpenetrating polymer networks of polyelectrolytes. Eurasian Chemical Technological Journal 9 177-192... 

With controllable strength of the self- and hetero-associated hydrogen, a molecular level penetrated semi-interpenetrating polymer networks (semi-IPNs) of ST-VPDMS with poly(N-vinylpyrrolidone) (PVPr) were prepared by condensation of the self-associated silanols.13... 

Semi-interpenetrating Polymer Network (Semi-IPN) Synthesis ... 

An increase in heat deflection temperature of some thermoplastic polymers can be achieved by the addition of polyfunctional aromatic cyanates (BPA/DC in particular) and trimerization catalysts. A rigid network is formed as a resul t of the cyanate trimerization. The polymer material consists of a linear polymer and a crosslinked network and belongs to the class of semi-IPNs (semi-interpenetrating Polymer Networks) the corresponding classification is given in [34-37]. 

Gilmer TC et al. (1996) Synthesis, characterization, and mechanical properties of PMMA/poly(aromatic/aliphatic siloxane) semi-interpenetrating polymer networks. J Poly Sci Part A Poly Chem 34(6) 1025—1037... 

Xiao H et al. (1990) The synthesis and morphology of semi-interpenetrating polymer networks based on polyurethane-poly(dimethylsiloxane) system. J Poly Sci Part A Poly Chem 28(3) 585-594... 

When monomer 2 is swollen into network 1 and polymerized in situ to form a linear polymer, a semi-interpenetrating polymer network (semi-IPN) of the first kind arises (18,19, 20, 21, 22). The first kind denotes that the first polymer synthesized forms the network (Figure 5A). A semi-IPN of the second kind denotes that the first synthesized polymer is linear and the second synthesized polymer is crosslinked (23-25). If polymer 1 is linear and polymer 2 is crosslinked, the structure in Figure 5B arises. In general, polymerizing 2 first and then 1, yields quite... 

Use of Polyethylene Terephthalate and Castor or Other Naturally Functionalized Triglyceride Oils for Making Semi-Interpenetrating Polymer Networks... 

Cho, C.S. Han, S.Y. Ha, J.H. Kim, S.H. Lim, D.Y. Clonazepam release from bioerodible hydrogels based on semi-interpenetrating polymer networks composed of poly(epsilon-caprolactone) and poly(ethylene glycol) macromer. Int. J. Pharm. 1999, 181, 235-242. 

Djonlagic, J. Z.S. Petrovic. Semi-interpenetrating polymer networks composed of poly(W-isopro-pyl acrylamide) and polyacrylamide hydrogels./. Polym. Sci. Pol. Phys. 2004, 42, 3987—3999. 

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