Wettability and ζ potentials of a series of methacrylate polymers and copolymers

Abstract

Polymers and copolymers of different methacrylates were synthesized and coated on glass slides. The surfaces of the polymer films were characterized by their water contact angles and ~" potentials using the Wilhelmy plate technique and streaming potential measurements, respectively. From contactangle measurements information was also obtained about mobility of surface polymer chains. Receding contact angles of methyl methacrylate (MMA) copolymers containing hydrophilic or charged units were decreased as compared to the MMA homopolymer. When charged hydroxyethyi methacrylate (HEMA) copolymers were compared with the HEMA homopolymer, the advancing contact angles increased, probably due to reorientation of surface polymer chains. The receding contact angles of poly(alkyl methacrylates) first increased and then decreased with increasing side-chain lengths. These changes were related to the mobility of the different polymers. Incorporation of positively or negatively charged groups in MMA or HEMA polymers accordingly changed the ~" potential of the polymers.

Preparation and characterization of fluorinated acrylate copolymer latexes by miniemulsion polymerization under microwave irradiation

“…The dynamic contact angles data were obtained by Wilhelmy method [39] at 25 8C using a Krǔ ss interface tension meter (Krǔ ss GmbH, Hamberg, Germany). The sample was held in the microbalance and progressively immersed in water and conversely receded to its original position at a constant rate of 0.5 mm/s.…”

Characterization of a low-wettable surface based on perfluoroalkyl acrylate copolymers

“…Contact angles (CA) data were obtained by Wilhelmy method [15] at 25 8C using Krüss interface tension meter (Krüss GmbH, Hamberg, Germany). The sample was held in the microbalance and progressively immersed into water, then, conversely receded to its original position at a constant rate of 0.5 mm/s.…”

Surface Science of a Filled Polydimethylsiloxane-Based Alkoxysilane-Cured Elastomer: RTV11

“…Samples were subjected to DCA analysis prior to water aging to establish baseline wettability. Samples were then immersed in 100 mL glass jars with ASTM Type I water (18 M⍀/cm) containing 200 ppm sodium azide as a biocide (16). DCA analysis was performed weekly at which time the storage water was changed.…”