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This book gives idea about how to modified reactive functional group Polymer structure using acidic substrate. Book represents the Applications of different heterogeneous catalyst with their selectivity and specificity. Synthesis of novolac phenol formaldehyde resin (NPFR) from formaldehyde and phenol is covered and Synthesis of epoxy novolac phenol formaldehyde resin (ENPFR) from NPFR by epoxidation using NaOH and epichlorohydrine and their modification with sulphanilic acid to from ENPFSA are discuss well. Characterization of NPFR, ENPFR and ENPFSA by IR spectroscopy, Functional group...

Transdermal drug delivery systems are adhesive, dug containing devices of defined surface area that deliver a pre-determined amount of drug to the surface of intact skin at a pre-programmed rate. These systems provide drug systemically at a predictable rate and maintain the rate for extended periods of time. In this work an attempt was made to formulate and evaluate TDDS for sustained release Atorvastatin calcium by solvent casting method. Low molecular weight, good permeability of Atorvastatin calcium made it a suitable drug candidate for the development of transdermal patches. The main...