Adhesive and dielectric properties of novel polyimides with bis(3,3 '-aminophenyl)-2,3,5,6-tetrafluoro-4-trifluoromethyl phenyl phosphine oxide (mDA7FPPO)

作者：Choi Jun Keol; Paek Kwan Yeol; Yoon Tae Ho^*

来源：European Polymer Journal, 2009, 45(6): 1652-1658.

DOI：10.1016/j.eurpolymj.2009.03.009

• Polyimide
• Phosphine oxide
• Fluorine
• Dielectric constant
• Adhesive property
• Peel strength

Polyimides with a low dielectric constant and excellent adhesion were prepared from a diamine containing phosphine oxide and fluorine groups, bis(3,3'-aminophenyl-2,3,5, 6-tetrafluoro-4-trifluoromethyl phenyl phosphine oxide (mDA7FPPO), and rigid-rod type dianhydride containing fluorine groups, such as 3,6-di(3',5'-bis(trifluoromethyl)-phenyl)pyromellitic dianhydride (12FPMDA). The polyimides were synthesized via the known two-step process, preparation of poly(amic-acid) followed by solution imidization, and characterized by FT-IR, NMR, DSC, TGA and TMA. In addition, their solubility, intrinsic viscosity, dielectric constant and adhesive property were also evaluated. For comparison, 3,6-di(4'-trifluoromethylphenyl) pyromellitic dianhydride (6FPMDA) and 3,6-diphenylpyromellitic dianhydride (DPPMDA) were also utilized. The prepared polyimides exhibited high T(g) (276-314 degrees C) excellent thermal stability (>500 degrees C in air), good adhesive property (104.7-126.3 g/mm), good solubility, and very low dielectric constant (2.34-2.89).

• 出版日期2009-6