Poly(2,6-dimethyl-1,4-phenylene-oxide) derivatives with sulfonyl pendant groups and methods therefor
申请人:The United States of America, as represented by the Secretary of the Air Force
公开号:US10364324B2
公开(公告)日:2019-07-30
A sulfonyl-substituted polyphenylene-ether polymer having improved dielectric properties and methods for making the same. The sulfonyl-substituted PPE include sulfone-containing polyphenylene oxides (“PPO”) polymers having repeating units of the formulas:
wherein each of R1 and R2 is H or an alkyl group containing from 1 to 4 carbon atoms, R3 is an alkylene group containing from 1 or 2 carbon atoms, R4 is selected from a group consisting of an alkyl group containing from 1 to 4 carbon atoms, an aryl group, and CF3, and X is a halogen atom. The subscript n is 0 or 1; the subscript m is 1 or 2, provided that when m is 2, R2 is H. A degree of polymerization ranges from about 5 to about 1,000, and a ratio of units having formula (1) to units having formula (2) of the sulfone-containing PPO polymer ranges from about 10:90 to about 90:10.
磺酰基取代的聚苯醚聚合物具有更好的介电性能,以及制造这种聚合物的方法。磺酰基取代的聚苯醚聚合物包括具有以下重复单元的含砜聚苯醚聚合物("PPO"):
其中 R1 和 R2 均为 H 或含有 1 至 4 个碳原子的烷基,R3 为含有 1 或 2 个碳原子的亚烷基,R4 选自含有 1 至 4 个碳原子的烷基、芳基和 CF3 组成的组,X 为卤素原子。下标 n 为 0 或 1;下标 m 为 1 或 2,条件是当 m 为 2 时,R2 为 H。含砜 PPO 聚合物的聚合度范围为约 5 至约 1,000,具有式(1)的单元与具有式(2)的单元之比范围为约 10:90 至约 90:10。