Term: polymer crystal
https://doi.org/10.1351/goldbook.P04737

Definition:
A crystalline domain usually limited by well-defined boundaries.

Notes:
0) Polymer crystals frequently do not display the perfection that is usual for low-molar-mass substances.
1) Twinned polymer crystals are, sometimes, erroneously referred to as 'crystals'.
2) Polymer crystals that can be manipulated individually are often called (polymer) single crystals. A single crystal may contain different fold domains.

Source: Purple Book, 1st ed., p. 76 (http://old.iupac.org/publications/books/author/metanomski.html)

Citation: 'polymer crystal' 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.P04737

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