Benjamin, "Efficient microwave assisted syntheses of unsubstituted cyclic imides
," Heterocycles, vol.
When SMA imide
resins were used as coagulants with chemical recycled pulp and TMP, the retention of fines and fillers was measured to be high.
The hydrogen-bonded imides
of BPOB-1, BPOB-2 and BPOB-3 are calculated to be about 27%, displaying a slight increase with increasing ODA content, which is suggested to be caused by the slightly decrease of the "free" C=O due to the ether group in ODA moiety.
Fluorinated poly(amide imide
)s show outstanding capability to be processed into flexible, transparent films, having low dielectric constant and tough mechanical characteristics.
The area of the symmetric imide
carbonyl stretching at 1778 [cm.sup.-1] (C = O in-phase imide
I) and the imide
II stretching vibration at 1380 [cm.sup.-1], were ratioed with the reference benzene ring vibration.
This could also be explained by [TABULAR DATA FOR TABLE 2 OMITTED] [TABULAR DATA FOR TABLE 3 OMITTED] the increased melt viscosity of the PETI copolymer with stiffer imide
units in the chain.
Herein we report insights into the evolution of the thermally induced structural transformation in poly(imide
) films by X-ray photoelectron spectroscopy (XPS)--a selective surface analysis technique.
In this paper, the nitrogen-phosphorous synergistic effect on flame retardancy was studied by incorporating rigid imide
and phosphorous group in diglycidylether of bisphenol A (BPA) resin.
The coating of SMI-1 shows some larger defects than SMI-2, related to coating strength and imide
The presence of absorption bands at 1792 and 1720 [cm.sup.-1] due to symmetric and asymmetric stretching of C = O in the five membered imide
ring indicates that the imide
ring remained intact in the polymerization.
Nucleophilic attack of the primary amine to the carbonyl group of the imide
ring occurred (Fig.
Characteristic bands for polyimide are imide
I(C=0 stretch at 1786 [cm.sup.-1]), imide
II(C-N-C axial vibration stretch at 1395 [cm.sup.-1]), imide
III(C-N-C transverse vibration stretch at 1124 [cm.sup.-1]) (26), (27).