pH neutralization amino groups remain in the polymer side chain, which were reacted with tetrakis(hydroxymethyl) phosphonium chloride (THPC) to obtain chemically cross-linked gels. The mechanical properties of gels have been studied by rheological measurements, which reveal that mechanical strength increases as weight% of polymer in solution, cross-linking density and polarity of solvents increases
这项工作报告了具有高机械强度的含侧链
氨基酸的交联聚合物凝胶的设计和合成。Boc-亮
氨酸甲基
丙烯酰氧基乙基酯(Boc-Leu-
HEMA)已通过可逆加成-断裂链转移(RAFT)聚合反应进行聚合,得到了相应的聚合物P(Boc-Leu-
HEMA)。在酸性条件和pH中和后,Boc基团脱保护后,
氨基侧残留在聚合物侧链中,然后与四(羟甲基)
氯化phospho(
THPC)反应,获得
化学交联的凝胶。凝胶的机械性能已通过流变学测量进行了研究,结果表明,机械强度随着溶液中聚合物的重量%,溶剂的交联密度和极性的增加而增加,并随着聚合物的分子量的增加而降低。G ')在很宽的角频率范围内证明了凝胶的粘弹性与角频率无关。横截面凝胶的场发射扫描电子显微镜(FE-
SEM)研究证实了流变学观察,即随着凝胶G '值的增加,凝胶的孔隙率降低。