L.K. Wang, A. Acovic, et al.
MRS Spring Meeting 1993
The polyimide poly[N, N′-(p-phenylene)-3,3′,4,4′-biphenyltetracarboxylic acid diimide] (BPDA-PDA) is used as a dielectric material in the electronics industry. Although the imidized polymer is insoluble in any organic solvent, the precursor polyamic acid is soluble in amide-type solvents or dimethyl sulfoxide (DMSO). A series of 10 polymers from the polycondensation of 3,3′,4,4′-biphenyltetracarboxylic acid dianhydride (BPDA) and p-phenylenediamine (PDA) with 4800 < Mw < 75 000 have been synthesized by controlling the stoichiometry. The solution properties were investigated in NMP (AT-methylpyrrolidinone) and DMSO by using low-angle light scattering, viscometry, and size exclusion chromatography with a light scattering detector. Estimates of the molecular flexibility from the dilute solution properties are compared with those calculated based on a freely rotating model. © 1991, American Chemical Society. All rights reserved.
L.K. Wang, A. Acovic, et al.
MRS Spring Meeting 1993
Andreas C. Cangellaris, Karen M. Coperich, et al.
EMC 2001
Kafai Lai, Alan E. Rosenbluth, et al.
SPIE Advanced Lithography 2007
Kigook Song, Robert D. Miller, et al.
Macromolecules