开发高性能乙烯-四氟乙烯共聚物的关键技术

Critical Techniques in Development of High-Performance Ethylene-Tetrafluoroethylene Copolymer

由于高性能乙烯-四氟乙烯(ETFE)共聚物树脂具有特殊的分子结构,使其在航空航天电线电缆绝缘材料、建筑用透明薄膜和柔性太阳能电池等有着不可替代的应用。从分子结构的角度出发,讨论了开发高性能乙烯-四氟乙烯共聚物树脂的关键技术。综述了第三单体的类型对聚合过程和产物性能的影响,总结了第三单体选择的基本原则,阐述了四氟乙烯的摩尔分数对ETFE性能的影响。另一方面,由于ETFE的高熔点和难溶解的特性,其分子结构的表征与分析一直是困扰研究人员的难题,归纳了ETFE分子结构的分析方法,并论述了各种方法在实际使用中的关键之处。

Ethylene-tetrafluoroethylene（ETFE）copolymers are widely used in wire and cable insulation of aircraft and aerospace,construction film and flexible solar membrane.These applications are irreplaceable due to their unique chain structure of ETFE.Based on the molecular structure,the critical techniques in the development of ETFE resins are investigated.The influence of the third monomers both on polymerization process and properties of the resulting ETFE resins are carefully reviewed.The preliminary principles for choicing the third monomer are provided.Meanwhile,the influence of the mole fraction of the tetrafluoroethylene on the properties of ETFE is also discussed.On the other hand,the researchers are troubled in the characterization of the ETFE molecular structure for many years due to the high melting point and insolubility of ETFE.Therefore,the published characterization methods for the molecular structure of ETFE are concluded and discussed.