期刊名称：Journal of Materials and Environmental Science
印刷版ISSN：2028-2508
出版年度：2020
卷号：11
期号：5
页码：713-722
出版社：University of Mohammed Premier Oujda
摘要：Crosslinking approach is evaluated for enhancing properties of polyvinyl alcohol (PVA) and starch (S) blend, for this a novel crosslinker glutaraldehyde sodium bisulfite (G) is introduced. The hydroxyl groups of PVA and starch reacts with glutaraldehyde sodium bisulfate via formation of acetal bonds, thus crosslinking could take place. Various analytical methods were carried to observe the effect of crosslinking of glutaraldehyde sodium bisulfite such as differential scanning calorimetry (DSC), Fourier transform infrared spectroscopy (FTIR), dynamic mechanical analysis (DMA), and contact angle measurement. Reduction in hydrogen bonding of PVA and starch were observed at higher dosages of glutaraldehyde sodium bisulfite. As the amount of crosslinker increased, blend showed better cohesion and was evidenced by the increase in glass transition temperature (Tg) and storage modulus. Compared with the non-crosslinked sample, cross-linked blends showed better thermal and mechanical properties.
