Thin Film Coating Process Calibration by Index Dispersion Enhanced Monitoring

2015 ◽  
Author(s):  
Wayne Rodgers ◽  
◽  
L.S. Ring ◽  
Keyword(s):  
Thin Film ◽  
Film Coating ◽  
Coating Process ◽  
Thin Film Coating

Conjugated polymers for thin film coating process

2001 ◽  
Vol 708 ◽  
Author(s):  
Zhexiong Tang ◽  
Wenguang Li ◽  
Cheryl Nowak ◽  
Sze Yang
Keyword(s):  
Thin Film ◽  
Molecular Weight ◽  
Acrylic Acid ◽  
Conjugated Polymers ◽  
Film Coating ◽  
Polymer Complex ◽  
Coating Process ◽  
Thin Film Coating ◽  
Polymer Complexes ◽  
Poly Acrylic Acid

ABSTRACTIn this paper, we present the syntheses of the conjugated polymers of different “effective molecular weights.” The goal is to be able to optimize the thin film coating process without compromising the electronic, optical and electroactive properties.Our strategy for controlling the effective molecular weight is to synthesize a double-strand conducting polymer that is an inter-polymer complex of a polymeric dopant and a conjugated polymer. The first strand of the two-strand complex is either a polyaniline or a polypyrrole chain, while the second strand is a poly(acrylic acid). The molecular weight of poly(acrylic acid) is used as a parameter for adjusting the coating and film-forming properties.We found that the inter-polymer complexes are dispersible in water. The dispersion stability is strongly dependent on the molecular weight of the poly(acrylic acid) strand. The dispersion is more stable for polymers synthesized with higher molecular weight of poly(acrylic acid). We also found that the particle size and particle morphology are dependent on the effective molecular weight.

Flow and Film-Forming Characteristics Analysis of Non-Newtonian Fluid Slot Coating

2014 ◽  
Vol 939 ◽  
pp. 539-546
Author(s):  
Wei Chu Shu ◽  
Tsai Fang Wu ◽  
Ren Haw Chen ◽  
Kuei Yuan Cheng ◽  
Chih Wei Hsieh
Keyword(s):  
Thin Film ◽  
Shear Rate ◽  
Newtonian Fluid ◽  
Process Parameters ◽  
Film Coating ◽  
Simulation Software ◽  
Coating Process ◽  
Thin Film Coating ◽  
Slot Coating ◽  
Simulation Results

The slot coating process in the production of polymer films has a wide range of applications. However, the process cannot be systemized. This study used the computational fluid dynamics software Polyflow to analyze the slot coating process and investigate the influence that the process parameters have on the characteristics of thin-film coating to reduce the time and cost consumed in the experimental methods. The rheological characteristics of the non-Newtonian fluid used in this study were first identified by conducting experiments, and then configured in the simulation software for fitting with mathematical models. In addition, the models of the slot coating process were constructed, and the Arbitrary Lagrangian-Eulerian (ALE) calculation methods were then used in the Polyflow software. The simulation results were then compared to the experimental results and the findings reported in relevant literature, to determine the influence that the process parameters have on the characteristics of thin-film coating. The simulation results were represented graphically in a coating window plot. The comparison results indicate that the viscosity-shear rate characteristic of the material in the shear rate range of optical film coating is an excellent fit for the Cross Law. When the coating speed is too high or the amount of fluid supply is insufficient, phenomena such as break lines, uneven thickness, and air entrainment can occur.

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