| 摘要 |
A polyvinyl alcohol is provided containing structural units of the following formula (I) at a molar fraction of 0.05-0.50 and the structural units of the following formula (II) at a molar fraction of 0.0001 to 0.50; <IMAGE> (I) <IMAGE> (II) wherein R1, R2, R3 and X are as desribed herein, and its use in preparation of gels, particularly hydrogels, effective for use in wound dressing materials. |
