The O1s components at 532.1 and 533.4 eV are attributed to C=O bonds in the imide
ring and C=O from ketone of the PI structure .
Galons, "An expeditious synthesis of cyclic imides
. Tetrahedron Lett.
and phosphorous groups into an epoxy resin matrix resulted in the improvement of the flame retardancy of the resin, which can be clearly seen from LOI values (Table 4).
It seemed that more alkyl chains in molecular skeletons in present gelators are more favorable for the present benzothiazole imide
derivatives in gelation of organic solvents than those of benzimidazole compounds.
content increases upon heating and shows a maximum value of 29% for SMI-1 or 37% for SMI-2 at 135[degrees]C.
In this study, the researchers carried out experiments on SMA imides
to determine how well these new resins perform in the wet end of the paper machine.
The peaks corresponding to the imide
ring [e.g., 1785 [cm.sup.-1] (C=O asymmetric stretching), 1728 [cm.sup.-1] (C=O symmetric stretching), 1374 [cm.sup.-1] (C-N stretching), and 721 [cm.sup.-1] (C=O bending)] were observed in the base membrane.
Based on this principal, the hydrogen bonding interactions in these co-PI fibers are studied by first, deconvoluting FTIR spectra in a wave number range of 17001750 [cm.sup.-1] based on the identification of different number shifts and calculating the proportions of the hydrogen-bonded C=0 stretching of the cyclic imide
. Figure 8 shows the deconvoluted results of the FTIR absorption bands in the range between 1700 and 1750 [cm.sup.-1].
Figure 5a shows the orientation of C-O-C backbone structure relative to the aromatic imide
ring [I(1272)/I(1612)] and C=0 bond [I(1272)/I(1786)].
Fluorinated poly(amide imide
)s show outstanding capability to be processed into flexible, transparent films, having low dielectric constant and tough mechanical characteristics.
A study of thermal and electrical behavior of some silica-containing poly (ether imide
) films is presented.