研究了聚乙烯醇(PvA)及不同缩醛度聚乙烯醇缩甲醛(PVAF)的水溶液性质，PVA和PVAF为保护胶体的聚醋酸乙烯酯(PvAc)乳液，醋酸乙烯酯(VAc)在PVA和PVAF上的接枝率对冻融稳定性的关系，和乳液冻融稳定改性机理.
The properties of polyvinyl alcohol and formalized polyvinyl alcohol aqueous solution were studied and their behavior as a protective colloid for polyvinyl acetate emulsion, especially in freezingthawing conditions were compared, including the function of graft degree of vinyl acetate on them.The results showed that polyvinyl formal was much preferable of polyvinyl alcohol in this respect.The mechanism of the modification was discussed.
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