Water whitening of solvent-cast thermoplastic polyhydroxyether thin films was written by Maples, Austin L.;Ferguson, Richard C.;Williams, Eric B.;Peterson, Robert;Delatte, David E.;Rawlins, James W.. And the article was included in Proceedings of the Annual International Waterborne, High-Solids, and Powder Coatings Symposium in 2018.Product Details of 763-69-9 The following contents are mentioned in the article:
System and conditionally specific water whitening of model epoxy corrosion control coatings were studied using thermoplastic polyhydoxyether films via UV – visible spectroscopy, attenuated total reflectance – fourier transform IR (ATR-FTIR) spectroscopy, differential scanning calorimetry, SEM, and internal stress measurements to quantify the size/spatial and material performance differences between controlled film variables. The void content and the corresponding reduction in light transmission was evaluated of the chem.-same polymers with differing mol. weights, which varied by the residual solvent concentration and composition in the film. Internal stress measurements yielded distinctly different profiles between annealing and exposure cycles and were mol. weight dependent and represent differences in material characteristics possible in all coatings materials. ATR-FTIR was utilized to compare water breakthrough times in relation to both mol. weight and residual solvent content. Greater solvent content resulted in an increase in water whitening and observed void formation and growth within the film. Lower mol. weight polymers exhibited these changes earlier in time, greater size and quantity vs. conditions and to a greater extent than films comprised of higher mol. weight, chem.-same polymers. This study involved multiple reactions and reactants, such as Ethyl 3-ethoxypropanoate (cas: 763-69-9Product Details of 763-69-9).
Ethyl 3-ethoxypropanoate (cas: 763-69-9) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits, including apples, durians, pears, bananas, pineapples, and strawberries. Many esters have the potential for conformational isomerism, but they tend to adopt an s-cis (or Z) conformation rather than the s-trans (or E) alternative, due to a combination of hyperconjugation and dipole minimization effects. The preference for the Z conformation is influenced by the nature of the substituents and solvent, if present. Lactones with small rings are restricted to the s-trans (i.e. E) conformation due to their cyclic structure.Product Details of 763-69-9
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics