Semi-interpenetrating polymer networks SIPN

Semi-Interpenetrating Polymer Network (SIPN) A semi-interpenetrating polymer network (SPIN) is a combination of two or more crosslinked polymers with two or more linear or branched polymers, at least one of which was synthesized and/or crosslinked in the presence of the others. An SIPN is distinguished from an IPN because the constituent linear or branched macromolecules can, in principle, be separated from the constituent polymer network(s) without breaking chemical bonds it is a polymer blend [7]. 

Cunha FOV, Melo DHR, Veronese VB, Forte MMC. 2004. Study of castor oil polyurethane-poly (methyl methacrylate) semi-interpenetrating polymer network (SIPN) reaction parameters using a 23 factorial experimental design. Mater Res 7 539-543. 

A semi-interpenetrating polymer network (SIPN) is a combination of a network polymer and a linear polymer. A SIPN is usually prepared by the polymerization of a multifunctional monomer in the presence of a linear polymer [1], Qo derivatives and Ciso-containing polymers form aggregates in solution and in the solid state [2-18]. For double-C o-end-capped polymers in which both ends of each polymer chain are capped with Cgo, the aggregation of C,so leads to a network-like material. Therefore, a combination of a double-C,so-end-capped polymer and a linear polymer produces a material resembling a SIPN and is termed a pseudo-SIPN. This chapter discusses the mechanical and optical properties of some pseudo-SIPNs involving double-C,so-end-capped polymers. 

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