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Experimental study demonstrates high tensile strength and rapid environmental biodegradation in starch-g-vinyl acetate composites, suggesting viable ecofriendly polymer alternatives.
A native potato starch was modififi ed with vinyl acetate by graft polymerization in alkaline medium with pH 10 in the mode of temperature change from 70 to 80°C for 4 hours. The initiator of the process was ammonium persulfate (NH 4 ) 2 S 2 O 8 . The conversion of vinyl acetate was 91,5%. The chemical structure of graft copolymer (Starch:Vinyl acetate) was confifi rmed by IR-spectroscopy. Composite materials of modififi ed starch and triethyl citrate with tensile strength of 24 MPa were obtained. Under natural environmental conditions, materials undergo biodegradation of 96% in 28 days.
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Monina et al. (2022) studied this question.
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