Synthesis and characterization of negative‐type photosensitive hyperbranched polyimides with excellent organosolubility from an A₂ + B₃ monomer system

Abstract

A series of photosensitive hyperbranched polyimides (HB-PIs) were prepared through facile end-group modifications of the fully imidized polymer. A triamine, 1,3,5-tris(4-aminophenoxy)benzene, and a dianhydride, 4,4Ј-(hexafluoroisopropylidene-)diphthalic anhydride, were condensed with a dropwise addition method in a molar ratio of 1/2 to afford an anhydride-terminated poly(amic acid) precursor, which was then end-capped by 4-aminophenol and chemically imidized to yield a phenol-terminated HB-PI. The modifications of the terminal phenol groups of the polyimide by acyl chloride compounds (acryloyl chloride, methylacryloyl chloride, and cinnamoyl chloride) gave the target polymers. The photosensitive HB-PIs showed good thermal properties and excellent solubility even in low-boiling-point solvents at room temperature, such as acetone, 1,1,2-trichloroethane, tetrahydrofuran, and chloroform. Photosensitive property studies revealed good photolithographic properties with a resolution greater than 3 m and a sensitivity of 650 -680 mJ/cm 2 .

Aromatic Hyperbranched Polymers: Synthesis and Application

“…The hb-PIs were characterized as inherently photosensitive to UV exposure, giving a patterning resolution greater than 3 μm. Chen and Yin [302] also prepared hb-PIs with terminal phenol groups that were modified by acyl chloride compounds (acryloyl chloride, methylacryloyl chloride, and cinnamoyl chloride) to yield photosensitive hb-PIs. Photosensitive property studies revealed good photolithographic properties with a resolution greater than 3 μm and a sensitivity of 650-680 mJ/cm 2 .…”

Synthesis, characterization and properties of photoresponsive polymers comprising photocrosslinkable pendant chalcone moieties

“…The polymer also exhibits an absorption peak at 825 cm −1 due to C-H out-of-plane bending vibrations. 1 …”

New photopatternable polyimide and programmable nonvolatile memory performances

“…For materials with such photocrosslinkable functionalities, there are several options, such as acryl, methacryl, cinnamoyl, stilbenyl and coumarinyl. [35][36][37][38][39][40][41][42][43][44] Finally, electrical memory function was considered. For the incorporation of electrical memory function, several candidate functional groups exist, including carbazolyl, aminotriphenyl, anthracenyl, fluorenyl, fullerenyl and aliphatic π-conjugations.…”