Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
CPP: Fachverband Chemische Physik und Polymerphysik
CPP 46: Poster II
CPP 46.51: Poster
Donnerstag, 12. März 2026, 09:30–11:30, P5
Ex-Situ Investigation of Latex Deformation — •Simon Schraad1,2, Shuxian Xiong1,2, Helder Marques Salvador3, Benedikt Sochor1, Sarathlal Koyiloth Vayalil1,4, Peter Müller-Buschbaum2, and Stephan V. Roth1,5 — 1DESY, Hamburg, Germany — 2TUM School of Natural Sciences, Chair for Functional Materials, Garching, Germany — 3CPP, Venlo/Poing, Netherlands/Germany — 4UPES, India — 5KTH, Department of Fibre and Polymer Technology, Stockholm, Sweden
Colloidal polymer latexes are used in ink-jet printing to form a pigment stabilizing layer on top of the cellulose layer. The latex film formation (LFF) is influenced by humidity, temperature, minimum film formation temperature (MFFT), and glass transition temperature (Tg). Exceeding MFFT polymer colloids begin to deform and further heating above the Tg polymers interdiffuse and coalesce into a homogeneous coating layer. Here we investigate cellulose nanofibrils (CNF) thin films coated with polystyrene colloids (diameters ranging from 100 to 500 nm) and commercially available polymeric colloids with different MFFT (Neocryl A639 and A1127). The samples were prepared by spray coating at temperatures below and above their Tg. Scanning electron microscopy revealed the size and shape of the colloids. Grazing incidence small angle scattering data shows contributions of spherical form factors from the colloids with respective diameters, which changes upon heating. We present a design of an experimental spray chamber to allow in-situ GISAXS and the spectral reflectance during spray deposition of latex inks to be used at synchrotron facilities.
Keywords: Latex Colloids; Polymer Deformation; GISAXS; Latex film formation