作者:Michelle D. Lefebvre、Christine M. Dettmer、Rachel L. McSwain、Chen Xu、Jonathan R. Davila、Russell J. Composto、SonBinh T. Nguyen、Kenneth R. Shull
DOI:10.1021/ma0509762
日期:2005.12.1
gradient, and random copolymers was measured using forward recoil spectrometry. The polymers were synthesized by a ring-opening metathesis polymerization, allowing a high degree of control over the sequence distribution. The norbornene-based monomers have reactivity ratios close to unity, which makes them ideal for facile tailoring of different gradient copolymer profiles. The copolymers form a good weakly
使用正向反冲光谱法测量了二嵌段共聚物,梯度共聚物和无规共聚物的界面偏析。通过开环复分解聚合来合成聚合物,从而可以高度控制序列分布。降冰片烯基单体的反应率接近于1,这使其成为轻松定制不同梯度共聚物轮廓的理想选择。共聚物形成一个良好的弱分离模型系统,对于该模型系统,我们可以获得相互作用参数χ的估计。均场理论用于描述界面偏析结果,并将测得的量与界面的详细分子结构相关联。二嵌段共聚物在界面处形成单层,并显着降低界面张力,而无规共聚物形成界面润湿层。梯度共聚物表现出中间行为,形成具有比二嵌段共聚物更大的界面宽度的单层。