isomorphous polymer co-crystal

https://doi.org/10.1351/goldbook.14235
Crystal consisting of two or more structurally different polymers, resulting in macromolecular isomorphism.
Examples: Polytetrafluoroethene and poly(vinylidene fluoride), poly(3-hydroxybutanoate), and poly(3-hydroxypentanoate).
Source:
PAC, 2011, 83, 1831. (Definitions of terms relating to crystalline polymers (IUPAC Recommendations 2011)) on page 1849 [Terms] [Paper]