Term: semi-interpenetrating polymer network (SIPN)
https://doi.org/10.1351/goldbook.S05598

Definition:
Polymer comprising one or more polymer networks and one or more linear or branched polymers characterized by the penetration on a molecular scale of at least one of the networks by at least some of the linear or branched macromolecules.

Note: A SIPN is distinguished from an IPN because the @C01281@ linear or branched macromolecules can, in principle, be separated from the @C01281@ @P04742@(s) without breaking chemical bonds; it is a @P04736@.

Related Terms:
1) constituent (http://doi.org/10.1351/goldbook.C01281).
2) polymer network (http://doi.org/10.1351/goldbook.P04742).
3) polymer blend (http://doi.org/10.1351/goldbook.P04736).

Source: PAC, 2007, 79, 1801. 'Definitions of terms relating to the structure and processing of sols, gels, networks, and inorganic-organic hybrid materials (IUPAC Recommendations 2007)' on page 1815 (https://doi.org/10.1351/pac200779101801)

Citation: 'semi-interpenetrating polymer network (SIPN)' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.S05598

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