Dynamic contact angle analysis

Uilk JM, Mera AE, Fox RB, Wynne KJ (2003) Hydrosilation-cured poly(dimethylsiloxane) networks intrinsic contact angles via dynamic contact angle analysis. Macromolecules 36 3689-3694... 

In summary, IGC is a simple, relatively inexpensive approach using standard GC instrumentation to obtain the surface thermodynamic properties of solids. The theoretical interpretation of the experimental resnlts is now well established, and the deduction of acid-base properties of materials can now be regarded as being routine. IGC provides a complementary method to the nse of wetting Uqnids, insomuch as it probes the microscopic properties of the solid surface, (as the probe molecules are invariably small and in the gaseous phase, and are at infinite dilntion, i.e. there is no interaction between adjacent probe molecules on the solid snrface or in the gas phase), while the use of liquids in techniques such as dynamic contact angle analysis probes the macroscopic properties. 

Uilk, J. M. Mera, A. E. Eox, R. B. Wynne, K. J., HydrosUation-Cured Poly(dimethylsiloxane) Networks Intrinsic Contact Angles via Dynamic Contact Angle Analysis. Macromolecules 2003,36, 3689-3694. 

Dynamic contact angle (DCA) analysis is a technique that allows polymer-solvent interactions to be quantified.154 These are inherent for all processes occurring at... 

Davies J, Nunnerley CS, Brisley AC, Edwards JC, Finlayson SD (1996) Use of dynamic contact angle profile analysis in studying the kinetics of protein removal from steel, glass, polytetrafluor-oethylene, polypropylene, ethylene-propylene rubber, and silicone surfaces. J Colloid Interface Sci 182 437-443... 

Surface analysis such as dynamic contact angle and surface tension are used to ensure proper wetting of epoxy and the substrate. Microscopic techniques, such as scanning electron microscopy (SEM), transmission electron microscopy (TEM), and atomic force microscopy (AFM), are widely used to study morphology, fracture, and adhesion issues of cured epoxy systems. Chemical analysis techniques, such as micro-IR, X-ray photoelectron spectrometry (XPS), and secondary ion mass... 

Details are given of the physicochemical properties and in vitro resistance to encrustation of films of polycaprolactone or blends of polycaprolactone with a polyvinylpyrrolidone-iodine mixture. Films were characterised in terms of tensile properties, dynamic mechanical thermal analysis, dynamic contact angle, and SEM. 29 refs. 

Surface science. Surface characterization studies included those for base polyurethane segmented block copolymers and base polymer modified by <2 wt% U-P[AB], Surface analytical techniques included tapping mode atomic force microscopy (TM-AFM), X-ray photoelectron spectroscopy (XPS), wetting behavior by dynamic contact angle (DCA) analysis and sessile drop measurements, and attenuated total reflectance infrared spectroscopy (ATR-IR). Contact antimicrobial behavior of U-P[AB] containing hydantoin and aikylammonium B side chains was determined by spray-on and sandwich tests previously described in detail elsewhere [11, 22, 38]. 

In this article, we aim to introduce our recent investigation relating to the surface molecular aggregation structure and surface molecular motion of the flu-oro(co)polymers with Rf side group. GI-WAXD measurement and X-ray photoelectron spectroscopy (XPS) using Cgo ion beam were applied to the surface molecular aggregation structure analysis and the depth analysis of the fluoropolymer films, respectively. Temperature dependence of the dynamic contact angle, XPS measurement in pseudo-hydrated state, and lateral force microscopy (LFM) measurement... 

Dynamic contact angle (DCA) analysis is a technique that allows polymer-solvent interactions to be quantified. These are inherent for all processes occurring at polymer solution interfaces and are likely to be responsible for the dynamic behavior of conducting polymers. Information regarding these interactions is of central importance to understanding of the properties of these materials. Furthermore, it provides information on how exposure to different solvent environments affects the chemical properties of the material. It is also possible to apply electrical stimuli to the polymer during DCA analysis to characterize the effect this has on the interactions between the polymer and its environment. 

Microphase—separation-like structures were observed for PASs by EPMA analysis. In this study, this phase separation did not seem to improve the blood compatibility of the aramid, but it did improve the mechanical strength. The XPS and dynamic contact angle studies of PAS surfaces verified that hypothesis. Therefore, the PASs showed desirable properties for both bulk phase and surfaces. 

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