CROSSLINKED POLYVINYL-ALCOHOL) HYDROGELS AS SWOLLEN ELASTIC NETWORKS
CROSSLINKED POLYVINYL-ALCOHOL) HYDROGELS AS SWOLLEN ELASTIC NETWORKS
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DOI：
10.1002/app.1977.070210704
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发表时间：
1977-01-01
影响因子：
3
通讯作者：
MERRILL, EW
中科院分区：
文献类型：
--
作者：
PEPPAS, NA;MERRILL, EW
在氮气保护下，用电子束辐照聚乙烯醇水溶液制备了透明的交联水凝胶。这些弱水凝胶在30°C下在水中溶胀时显示出低弹性模量（至多50 psi）、低极限拉伸强度（至多4psi）和低断裂延伸性（不高于85%）。由溶胀和拉伸实验计算交联剂之间的分子量值。事实上，对于每个溶胀实验计算两个Mcs值，（a）允许观察到的聚合物-溶剂相互作用参数χ 1随浓度的变化，以及（B）根据文献数据固定χ1= 0.494。通过（a）或（B），从拉伸数据得到的Mcb与从溶胀数据得到的Mcb的相关性近似为线性，并给出相同的一致性百分比。
Transparent crosslinked PVA hydrogels were prepared by electron beam irradiation of aqueous solutions under nitrogen. These weak hydrogels, upon swelling at 30°C in water, showed low elastic moduli (up to 50 psi), low ultimate tensile strength (up to 4 psi), and low extensibility to break (not higher than 85%). Values of the molecular weight between crosslinksMcwere calculated from swelling and from tensile experiments. In fact, two values ofMcwere calculated for each swelling experiment, (a) allowing for observed variation in the polymer–solvent interaction parameter χ1with concentration, and (b) fixing χ1= 0.494 according to literature data. The correlation of theMcobtained from tensile data with theMcobtained from swelling data, by (a) or (b), was approximately linear and gave the same per cent agreement.