邻苯二甲酸酐、顺丁烯二甲酸酐在水中溶解度的测定与关联

常压下,在一定温度范围内准确测定了邻苯二甲酸酐、顺丁烯二甲酸酐在水中的溶解度,并分别用简化的溶解度方程、Apelblat溶解度方程及Wilson方程对实验数据进行了关联。简化的溶解度方程、Apelblat溶解度方程及Wilson方程对邻苯二甲酸酐—水体系关联所得平均相对误差分别为5.66%、3.44%和4.29%,对顺丁烯二甲酸酐—水体系所得平均相对误差分别为1.50%、1.59%和5.14%,模型基本上可满足工程设计的需要。

短油度水分散性醇酸树脂的合成工艺研究

采用熔融酯化成盐法合成短油度水分散性醇酸树脂，通过考察使用不同的脂肪酸，中和剂三乙胺加入量及顺丁烯二甲酸酐的加入量等因素得出短油度水性醇酸树脂的优化配方。实验结果表明，油度为40％，醇超量r为25％的醇酸树脂，采用三乙胺做中和剂，其加入量为计算量的110％，用顺丁烯二甲酸酐改性树脂主链，顺丁烯二甲酸酐在二元酸中的比例为4％～6％时的树脂综合性能较好。

Novel degradable polymer networks containing acetal components

A novel copolymer network with acetal structure was prepared using bis[4-(vinyloxy)butyl](4-methyl-1,3-phenylene)biscarbamate(BECT)as the crosslinking agent.Firstly,a tri-copolymer of maleic anhydride(MAn),n-butyl vinyl ether(BVE)and 4-hydroxybutyl vinyl ether(HBVE)was synthesized via free-radical polymerization with 2,2′-azobisisobutyronitrile as the initiator.The tri-copolymer consisted of two sorts of alternating units,MAn-alt-BVE and MAn-alt-HBVE.The linear copolymer Poly((MAn-alt-BVE)-co-(MAn-alt-HBVE))with pending hydroxyl groups was then combined with BECT in the presence of pyridinium p-toluenesulfonate,generating a copolymer network comprising acetal components in the crosslinking segment. This polymer network exhibited degradation in acid conditions.