摘要
研究辐射交联聚乙烯醇的微观结构，以期进一步揭示这种水凝胶结构与性能的关系．用６０Ｃｏγ射线直接辐射聚乙烯醇水溶液制得凝胶，测定了水凝胶的凝胶分数和溶胀度；用Ｃｈａｒｌｅｓｂｙ辐射交联理论和Ｆｌｏｒｙ溶胀方程进行数据分析；通过对水凝胶的热分析，计算了水凝胶中不同结合态水的含量；给出聚乙烯醇水凝胶射交联／降解几率比，交联点密度１／Ｍｃ以及不同结合态水与吸收剂量关系．
Poly(vinyl alcohol)(PVA)hydrogels were prepared by irradiating PVA aqueous solutions with 60 Co γ ray.Some asppects of microstructures of the PVA hydrogels were studied.Gel fractions( g ) and swelling degeree( D s)of the hydrogels were measured.Charlesby′s theory of polymer irradiation crosslindking and Flory′s swelling equation of polymer gels were used to analyse experimental data,Different features of the water in the hydrogels were discussed according to DSC spestra.It was obtainde that microstuctures of the PVA hydrogels were related to absorbde dose
出处
《北京理工大学学报》
EI
CAS
CSCD
1997年第4期431-434,共4页
Transactions of Beijing Institute of Technology
关键词
聚乙烯醇
水凝胶
辐射交联
微观结构
poly(vinyl alcohol)
hydrogel
irradiation
cross linked strucure
