H-PVA Cross-Linking Mechanism Prepared By Freeze-Thaw And Annealing: Optimizing Gel Fraction And SwellingDhiya’ Acfira Tsaniatri, Kamarza Mulia and Elsa Anisa KrisantiE3S Web Conf., 503 (2024) 08008DOI: https://doi.org/10.1051/e3sconf/202450308008