申请人:The Dow Chemical Company
公开号:US05216110A1
公开(公告)日:1993-06-01
Azole rings, such as oxazole and thiazole rings, can activate an aromatic ring bonded to a leaving group such as a halogen atom so that the aromatic ring will undergo aromatic nucleophilic substitution. The reaction is useful for making ethers, thioethers and amines containing azole rings. In particular, monomers having azole rings, activated aromatic rings with leaving groups and nucleophilic moieties can react under conditions of aromatic nucleophilic displacement to form non-rigid rod PBZ polymers. The non-rigid rod PBZ polymers can be used to form molecular composites with rigid rod PBZ polymers which molecular composites are not substantially phase separated.
氮杂环类化合物,例如噁唑环和噻唑环,可以激活与卤素原子等离子基相连的芳香环,使得芳香环会经历芳香性亲核取代反应。该反应对于制备含有氮杂环的醚、硫醚和胺类化合物很有用。特别是,在芳香性亲核取代条件下,具有氮杂环、活化的含离去基的芳香环和亲核性官能团的单体可以反应,形成非刚性杆状PBZ聚合物。非刚性杆状PBZ聚合物可以用于与刚性杆状PBZ聚合物形成分子复合材料,这些分子复合材料没有明显的相分离。