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What are the specific chemical reactions that occur between the carboxyl group and Omid in hydrogel pva/am/mba/pei/aps/amps? 


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The specific chemical reactions that occur between the carboxyl group and Omid in the PVA/AM/MBA/PEI/APS/AMPS hydrogel involve crosslinking reactions. In the synthesis process, carboxyl groups from various components like carboxymethylcellulose (CMC) and fumaric acid (FA) react with hydroxyl groups of poly(vinyl alcohol) (PVA) and other compounds through ester formation, leading to crosslinking. Additionally, in aqueous solutions of borates, PVA hydrogels exhibit reversible changes in tensile forces in response to pH and glucose concentrations, indicating dynamic interactions possibly involving carboxyl groups. These crosslinking reactions play a crucial role in enhancing the mechanical properties and stability of the hydrogel, as observed in studies on PVA/PVP composite hydrogels.

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