Perfluorocyclobutyl (PFCB)-based polymers exhibit attractive properties, including good thermal and chemical stability, high hydrophobicity and transparency, and good insulating properties. The excellent properties of these polymers have attracted extensive attention from both industry and academia. These polymers can be synthesized through molecular design and used as high-performance optical materials, proton exchange membranes, and dielectric materials. In particular, PFCB-based polymers having very low dielectric constants (D_k) and dielectric losses (D_f) derived from monomers containing thermally cross-linkable trifluorovinyl ether (TFVE) groups have been developed. On the basis of their good dielectric properties, the new PFCB-based polymers have potential application in upcoming high-frequency communication (5G or higher frequencies). This contribution summarizes the new developments of PFCB-polymers, emphasizing the progress in the design and synthesis of new multi-functional TFVE-based monomers during the past five years.

中文翻译：

---

功能材料的全氟环丁基聚合物

基于全氟环丁基（PFCB）的聚合物具有吸引人的性能，包括良好的热和化学稳定性，高疏水性和透明度以及良好的绝缘性能。这些聚合物的优异性能引起了工业界和学术界的广泛关注。这些聚合物可以通过分子设计合成，并用作高性能光学材料，质子交换膜和介电材料。尤其是，具有非常低的介电常数（D _k）和介电损耗（D _f）的PFCB基聚合物已经开发了衍生自含有热可交联三氟乙烯基醚（TFVE）基团的单体的）。基于其良好的介电性能，新的基于PFCB的聚合物在即将到来的高频通信（5G或更高频率）中具有潜在的应用。这项贡献总结了PFCB聚合物的最新发展，强调了过去五年来新型基于TFVE的多功能单体在设计和合成方面的进展。