Abstract
Partial chemical modification of poly(vinyl alcohol) (PVA) was performed through tosylation followed by azidation. Amine functional PVA was also prepared by grafting propargylamine using click chemistry reaction. Through this approach, a tosyl group (a good leaving group), azide group (a group used in click chemistry) and amine group (a group used for amidation) were attached to PVA polymer chains. The three chemical modifications were performed in water. FTIR and XPS analysis confirmed the chemical modification after each step. Thermogravimetric analysis (TGA) was used to study the thermal stability of the modified PVA.
Highlights
Polyvinyl alcohol (PVA) is the largest volume synthetic water-soluble polymer produced in the world [1]
We showed the possibility to incorporate tosyl group on PVA polymer chain
FTIR and XPS tools proved the chemical modification of PVA
Summary
Polyvinyl alcohol (PVA) is the largest volume synthetic water-soluble polymer produced in the world [1]. PVA has excellent chemical resistance, a good mechanical property, a good film forming capability and an excellent biocompatibility [2]. PVA is biodegradable in the presence of suitable microorganisms. The several useful properties of PVA result in broad industrial use and make it interesting to elaborate environmentally friendly materials [3,4,5]. PVA can be considered as an inert material. The introduction of chemical functionalities is necessary to improve its reactivity. Chemical modifications of PVA, which can be made through its hydroxyl groups, are
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