【摘要】 聚2,6-二甲基苯醚(PPO)是重要的工程塑料,一般采用在有机溶剂中使2,6-二甲基苯酚(DMP)氧化聚合的方法合成,这就需要溶剂回收装置和防爆反应器,且污染环境。从绿色化学观点出发,以水作为反应介质,不仅对环境友好,而且PPO不溶于水,容易分离。近年来,一些学者研究了在油/水两相或全水介质中使DMP氧化聚合合成PPO的新方法。本文主要综述了该方法的研究进展,包括DMP氧化聚合的机理,油/水两相或水介质中对聚合速率、氧化偶合选择性及PPO分子量等的影响因素。更多还原

【Abstract】 Poly(2,6-dimethylphenylene oxide) (PPO) is an important engineering plastics and is synthesized by oxidative polymerization of 2,6-dimethylphenol (DMP) in an organic solvent, therefore both a solvent recovery process and an explosion-proof reactor are needed. On the view of green chemistry, the use of water as the reaction medium is environmentally friendly. Furthermore, PPO can be separated from water easily due to its insolubility in water. The synthesis of PPO by oxidative polymerization of DMP in oil/water biphase and aqueous media has been developed. The polymerization of 2,6-dimethylphenol, including the oxidative coupling mechanism, and factors that influence the polymerization rate of DMP, oxidative coupling selectivity and molecular weight of PPO in oil/water biphase and aqueous media, was reviewed in this paper.更多还原