Title: occluded particle
Long Title: IUPAC Gold Book - occluded particle
DOI: 10.1351/goldbook.14302
Status: current

Definition
Multicomponent particle in which one polymer forms more than one phase domain within a matrix of another polymer.

Notes
1) The number and size of the domains can vary, and their spatial distribution within the particles is often not uniform.
2) This type of particle is also referred to as having microdomain morphology.

Related Term
- multicomponent particle: https://goldbook.iupac.org//terms/view/14298

Source
- PAC, 2011, 83, 2229. 'Terminology of polymers and polymerization processes in dispersed systems (IUPAC Recommendations 2011)' on page 2235 (https://doi.org/10.1351/PAC-REC-10-06-03)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/14302/html
- json: https://goldbook.iupac.org/terms/view/14302/json
- xml: https://goldbook.iupac.org/terms/view/14302/xml

Citation: Citation: 'occluded particle' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.14302
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Accessed: 2026-07-16T04:45:15+00:00