Polymer grafting is a technique to improve the morphology, chemical, and physical properties of the polymer. This technique has the potential to improve the existing conduction and properties of polymers other than charge transport; as a result, it enhances the solubility, nano-dimensional morphology, biocompatibility, bio-communication, and other property of parent polymer. A polymer’s physicochemical properties can be modified even further by creating a copolymer with another polymer or by grafting. Here in the various chemical approaches for polymer grafting, like free radical, click reaction, amide formation, and alkylation have been discussed with their importance, moreover the process and its importance are covered comprehensively with their scientific explanation. The present review also covers the effectiveness of the graft-to approaches and its application in various fields, which will give reader a glimpse about polymer grafting and its uses.
A simple synthetic strategy is described for synthesis of 3-arylazo-2-methyl-7-phenylpyrimido [1,2-b][1,2,4]triazepine-4,9-diones 4a-j. The acid dissociation constants were determined for the series prepared and were correlated by a Hammett-type equation using enhanced substituent constants. The results of such correlation together with the spectral data, including 15 N isotopic labelling, indicated that the studied compounds exist predominantly in the hydrazone tautomeric form.
Synthesis and Tautomeric Structure of 2-Arylazo-4H-imidazo[2,1-b][1,3,4]thiadiazines. -20 Title compounds of type (III) are prepared. The study of their tautomeric structures by spectral analysis and by the Hammett correlation of their acid dissociation constants shows that they exist in the hydrazono form. -(SHAWALI*, A. S.; MOSSELHI, M. A. N.; FARGHALY, T. A.; J. Chem. Res. 2007, 8, 479-483; Dep. Chem., Fac. Sci., Cairo Univ., Giza 12613, Egypt; Eng.) -M. Bohle
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