Linear aromatic polymers having low dielectric constants are produced by minimizing the electronic interactions between polymer chains. This is accomplished by one or more of the following means:
incorporating separator or linking groups in the polymer molecular structure; producing physical kinks or dissymmetry in the polymer chains; incorporating a bulky group in the polymer molecular structure; and incorporating one or more fluorine atoms in the polymer molecular structure. Low dielectric aromatic condensation polyimides prepared according to this invention are highly suitable as film and coating materials for both industrial and aerospace applications where a high degree of electrical insulation, moisture resistance, mechanical strength, and thermal stability are required.
具有低介电常数的线性芳香族聚合物是通过尽量减少聚合物链之间的电子相互作用而制成的。具体方法如下
在聚合物分子结构中加入分离基团或连接基团;在聚合物链中产
生物理扭结或不对称;在聚合物分子结构中加入大体积基团;以及在聚合物分子结构中加入一个或多个
氟原子。根据本发明制备的低介电芳香缩合聚
酰亚胺非常适合作为薄膜和涂层材料,用于需要高度电绝缘、防潮、机械强度和热稳定性的工业和航空航天领域。