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In order to shorten the degradation incubation period of existing seawater‐degradable materials and achieve “disappearance” in seawater as soon as possible, based on the successful introduction of hydrolyzed sites GA into the PBS main chain to obtain the PBSG copolymer matrix, water‐soluble PVA is introduced to finally obtain a series of PBSG/PVA blends, aiming to promote the hydrolysis process of...