题目内容
PVA是常用的成膜材料,PVA05-88是指
2021-12-27
A.相对分子质量500~600
B.相对分子质量8800,醇解度是50%
C.平均聚合度是500~600,醇解度是88%
D.平均聚合度是86~90,醇解度是50%
E.以上均不正确
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