摘要
利用原子转移自由基聚合(ATRP)反应合成了相对分子质量分布指数低且相对分子质量可控的含糖聚合物。以3-O-甲基丙烯酰基-双丙酮-D-葡萄糖(MDAGLu)为单体,对其ATRP反应的影响因素进行了系统考查。结果表明:对于活性较高的甲基丙烯酸酯类单体,低温更有利于实现反应的控制;对于给定的单体,为了实现链引发和链增长速率的匹配,催化剂和配体的活性并不是越高越好;对于溶液聚合,溶剂的链转移常数要低,且对聚合物和催化体系要有良好的溶解性。在最优条件下MDAGlu的反应动力学为一级反应,随着反应时间的延长,转化率和相对分子质量逐渐增大,且相对分子质量分布指数均小于1.2。
The low polydispersity and molecular controlled glycopolymer were synthesized via atom transfer radical polymerization(ATRP).Taking methacryloyl-diacetone-D-glucose(MDAGlu)as monomer,the effect of various parameters pertinent to ATRP was explored.In order to realize controlled/living ATRP,lower temperature is preferable for methacrylate monomers with higher reaction activity.In the meantime,the higher activity of catalyst system is not necessarily the better in order to bring about a match of the chain initiation and propagation rate.Also,the low chain transfer constant and good solubilization to polymer and catalytic system of solvent are necessary for solution ATRP.Under the optimal condition,the time-conversion first-order plot is linear,the number-average molecular weight increases in direct proportion to the ratio of the monomer conversion to the initial initiator concentration,and all the molecular weight distributions of PMDAGlu are less than1.2.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2014年第10期43-48,共6页
Polymer Materials Science & Engineering
基金
国家自然科学基金资助项目(21176257)
中央高校基本科研业务费专项资金资助(14CX2056A)
青岛经济技术开发区重点科技计划项目(2013-1-56)
