Drying Technology: An International Journal Design of Binary Polymeric Coatings for Minimizing the Residual Solvent Part I: Experimentationpage/terms-and-conditions (original) (raw)

Several binary polymeric coatings of poly(styrene) -tetrahydrofuran have been dried under quiescent drying conditions. Coatings are made using four different solutions of polymer having 5. 0104, 9.75, 10.06, and 15.14 % wt poly(styrene) initially. Experiments were performed for several different thicknesses for each polymer solution. Residual solvent remaining is lowest in the thicker coating. Results show that the thicker coating should be applied once rather than layer by layer to minimize the residual solvent remaining. Next layer is applied after the complete drying of previous layer. This practice should continue till we get desired thickness. For an instance, coating of initial thickness: 1010 m µ and final thickness: 61 m µ have residual solvent: which is lower than the residual solvent in dried coatings of nearly same final thicknesses using layer by layer technique.

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