Polymer comprising two or more networks that are at least partially interlaced on
a molecular scale but not covalently bonded to each other and cannot be separated
unless chemical bonds are broken.
Note:
A mixture of two or more preformed polymer networks is not an IPN.
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 1814