Introducing Polar Monomers into Polyisobutylene by Living Cationic Polymerization: Structural and Kinetic Effects
作者:Katharina Hackethal、Diana Döhler、Susanne Tanner、Wolfgang H. Binder
DOI:10.1021/ma9025114
日期:2010.2.23
with styrene monomers 1a, 1b, and 2c proceeded under incorporation of the comonomer into the PIB polymer (as proven by MALDI and NMR spectroscopy), whereas monomer 1c was not incorporated and resulted in broad polydispersities of the resulting PIB polymers. Inline-IR kinetic measurements of the monomer consumption demonstrated strong effects of the monomer structure on the polymerization kinetics, with
我们报道了使用活性阳离子聚合和TiCl 4 / TMPCl作为引发剂的极性苯乙烯单体与异丁烯(IB)的直接共聚,这首次打开了将极性部分以直接共聚的方式引入PIB聚合物的可能性。研究的极性苯乙烯单体包含吡啶(1a),可力丁(1b,1c),胸腺嘧啶(2c)和/或三唑部分(2a - 2c)。与苯乙烯单体1a,1b和2c共聚在将共聚单体结合到PIB聚合物中的过程中(如通过MALDI和NMR光谱法所证实的),而单体1c没有被结合并导致所得PIB聚合物的宽多分散性。单体消耗的在线IR动力学测量结果表明,单体结构对聚合动力学具有强烈影响,聚合速率(k p)增至15。附着的残基R(R =己基(3a),苯基(3b),对甲氧基苯基(3c),对甲基苯基(3d),对氯苯基(3e)),聚合速率降低(k p)的顺序为3e > 3b > 3c > 3e > 3a = k p(IB)。在相同条件下,相对于IB的均聚,k p