agglomeration

in polymer science
Also contains definition of: aggregation in polymer science
https://doi.org/10.1351/goldbook.AT07607
Process in which dispersed molecules or particles assemble rather than remain as isolated single molecules or particles.
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 1821 (https://doi.org/10.1351/pac200779101801)