non-parallel-chain crystal

https://doi.org/10.1351/goldbook.14245
Polymer crystal in which the stems are aligned along two or more different crystallographic directions.
Note: So far, the only example of non-parallel-chain polymer crystal is the \(\ce{\upgamma\mbox{-}polymorph}\) of isotactic polypropylene, where double-layers of parallel chains alternate with identical double-layers rotated by approximately \(\pu{80\!^{\circ}}\).
Source:
PAC, 2011, 83, 1831. (Definitions of terms relating to crystalline polymers (IUPAC Recommendations 2011)) on page 1852 [Terms] [Paper]
Citation: 'non-parallel-chain 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.14245 RIS BibTex EndNote
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