To solve film formation and creep of nonvulcanized polybutadiene liquid rubber, it was designed and fabricated as a thermosetting, transferable, and symmetrical “sandwich” structure adhesive film through solution coating processing. The adhesive failure evolved from an independent cohesive failure or interfacial failure to a randomly staggered interfacial failure. According to the molecular dynamic simulation, compared to the molecular structure of 1,4-polybutadiene, the isolated π electron cloud of the vinyl side chain of 1,2-polybutadiene can form “chemical-like bonding” with the outer electrons of copper atoms. Meanwhile, the peel strength of the surface-modified polybutadiene adhesive (28.16 N/25 mm) was about three times that of the untreated one (10.11 N/25 mm), and its dielectric properties (ε′ = 2.416 and tan δ = 0.0026) maintained an ultralow level at 10 GHz, which was mainly decided by the electronic and atomic polarization of vinyl. This strategy was helpful to develop a processing method for the adhesive film of nonvulcanized liquid rubber and apply to high-speed signal transmission.

中文翻译：

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具有高频低介电常数，超低介电损耗和高粘合强度的对称“三明治”式聚丁二烯薄膜

为了解决非硫化聚丁二烯液态橡胶的成膜和蠕变问题，通过溶液涂覆工艺将其设计和制造为热固性，可转移且对称的“三明治”结构胶粘膜。粘合破坏从独立的内聚破坏或界面破坏发展为随机交错的界面破坏。根据分子动力学模拟，与1,4-聚丁二烯的分子结构相比，1,2-聚丁二烯的乙烯基侧链的孤立π电子云可以与铜原子的外电子形成“化学键” 。同时，表面改性的聚丁二烯粘合剂的剥离强度（28.16 N / 25 mm）约为未处理的剥离强度（10.11 N / 25 mm）的三倍，并且其介电性能（ε'= 2.416和tanδ= 0 。0026）在10 GHz时保持超低水平，这主要是由乙烯基的电子和原子极化决定的。该策略有助于开发非硫化液态橡胶胶膜的加工方法，并应用于高速信号传输。