Efficient Synthesis of High Molar Mass, First- to Fourth-Generation Distributed Dendronized Polymers by the Macromonomer Approach
作者:Afang Zhang、Bin Zhang、Eva Wächtersbach、Manfred Schmidt、A. Dieter Schlüter
DOI:10.1002/chem.200305142
日期:2003.12.15
series of first- to fourth-generation (G1-G4) dendronized macromonomers, 5, 7, 10, and 12, was synthesized, and their polymerization behavior under radical conditions investigated. These conditions were thermally induced radical polymerization (TRP) and atom-transfer radical poymerization (ATRP). TRP was applied to all monomers and gave polymers PG1-PG4, whose molar masses range from several millions
合成了同源的第一至第四代(G1-G4)树枝状大分子单体5、7、10和12,并研究了它们在自由基条件下的聚合行为。这些条件是热诱导自由基聚合(TRP)和原子转移自由基聚合(ATRP)。将TRP应用于所有单体,得到聚合物PG1-PG4,其摩尔质量范围从PG1的几百万到PG2和PG3的估计几十万,以及PG4的低聚体系。ATRP仅应用于G1和G2单体5和7。对单体5的动力学研究提供了证明其聚合以受控方式进行的证据。仍能给出单峰摩尔质量分布的最高单体与引发剂比率为300:1(对于5)和100:1(对于7),对应于PG1和PG2的可实现的摩尔质量范围约为M(n)= 100 000(DP(计算)(PG1)= 200,DP(计算)(PG2)= 90)。多分散度在通常范围内(PDI = 1.1-1.2)。摩尔质量是通过GPC在DMF中测定的,相对于通过光散射测定的PG1的绝对摩尔质量进行了校准。