Abstract
The partially substituted poly(vinyl benzal) was synthesized from poly (vinyl alcohol) and benzaldehyde with hydrochloric acid as a catalyst. The change in the surface pressure—area isotherms due to various inorganic and organic salts and urea in the substrate was investigated for the monolayers of the partially substituted poly(vinyl benzal)s by using a modified Wilhelmy balance at 20°C. The surface pressure—area isotherms of the polymers were expanded progressively with increasing salt concentration. The expansion is in the order: Na butyrate > Na benzoate >> urea > CaCl2 > BaCl2 > Na2SO4>>NaCl\\simeqKCl. It is concluded that the expansion of the monolayer on inorganic salts is caused by the effect of “salting out” and that on organic salts or urea is due to the interactions between the polymers and the solutes in the substrate.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
