用硝酸铈铵作引发剂,通过水溶液聚合法制得了玉米淀粉接枝丙烯酸高吸水性树脂。研究了交联剂及引发剂用量、中和度、反应温度以及反应时间等对吸水率的影响。得到的最佳反应条件为:交联剂和引发剂与丙烯酸的摩尔比分别为0.95×10-5...用硝酸铈铵作引发剂,通过水溶液聚合法制得了玉米淀粉接枝丙烯酸高吸水性树脂。研究了交联剂及引发剂用量、中和度、反应温度以及反应时间等对吸水率的影响。得到的最佳反应条件为:交联剂和引发剂与丙烯酸的摩尔比分别为0.95×10-5和4.8×1-0 3,中和度71%,反应温度45℃,反应时间2 h。制得的高吸水树脂在室温下30 m in每克吸蒸馏水和自来水分别约为其自身质量的1000和200倍。展开更多
Core/shell type acrylic-polyurethane hybrid microemulsions in which polyurethaneas the shell and acrylic polymer as the core were prepared successfully. Different cross-link-ing structures between core and shell can b...Core/shell type acrylic-polyurethane hybrid microemulsions in which polyurethaneas the shell and acrylic polymer as the core were prepared successfully. Different cross-link-ing structures between core and shell can be formed by introducing hydroethyl acrylate andadipoyl dihydrazine at the ends of the polyurethane chains. The photon correlation spec-troscopy studies revealed that the mean particle size of the emulsions were smaller than 200nm. The particle morphology results revealed the core/shell structure of the uncross-linkingtype microemulsions and interpenetrating networks of the cross-linking type microemulsions.展开更多
文摘用硝酸铈铵作引发剂,通过水溶液聚合法制得了玉米淀粉接枝丙烯酸高吸水性树脂。研究了交联剂及引发剂用量、中和度、反应温度以及反应时间等对吸水率的影响。得到的最佳反应条件为:交联剂和引发剂与丙烯酸的摩尔比分别为0.95×10-5和4.8×1-0 3,中和度71%,反应温度45℃,反应时间2 h。制得的高吸水树脂在室温下30 m in每克吸蒸馏水和自来水分别约为其自身质量的1000和200倍。
文摘Core/shell type acrylic-polyurethane hybrid microemulsions in which polyurethaneas the shell and acrylic polymer as the core were prepared successfully. Different cross-link-ing structures between core and shell can be formed by introducing hydroethyl acrylate andadipoyl dihydrazine at the ends of the polyurethane chains. The photon correlation spec-troscopy studies revealed that the mean particle size of the emulsions were smaller than 200nm. The particle morphology results revealed the core/shell structure of the uncross-linkingtype microemulsions and interpenetrating networks of the cross-linking type microemulsions.
