【摘 要】
：
A series of novel aromatic poly ( amide imide)s containing phthalazinone moieties were prepared from 2-(4-aminophenyl)-4-[3-methyl-4-(4-aminophenoxy)-2,3-phthal
【机 构】
：
Department of Polymer Science & Materials
论文部分内容阅读
A series of novel aromatic poly ( amide imide)s containing phthalazinone moieties were prepared from 2-(4-aminophenyl)-4-[3-methyl-4-(4-aminophenoxy)-2,3-phthalazinone-1], a novel diamine 1 with four diimide-dicarboxylic acids by Yamazaki phosphorylation method with the inherent viscosity of 0.360.65 dL/g. These polymers had high glass transition temperatures above 300(C and they lost 10% weight between 426~475℃ in N2. The structure of diamine 1 and the polymers was confirmed by IR, 1H NMR and MS. The obtained polymers were readily soluble in polar solvents such as NMP, m-cresol etc. and easily cast into tough, flexible films. The X-ray indicated that they are all amorphous.
其他文献
Three rare-earth-containing heteropolyoxometalates with different sizes, Na9[Eu(W5 O18)2], K13[Eu(SiW11O39)2], and K17[Eu(P2W17O61)2], have been incorporated by
The transport characteristics of high temperature superconductor current and Josephson current is inves-tigated in the framework of the modified time-dependent
Reaction of simple dialkyl phosphites with symmetrical 1,3,5-trisubstituted hexahydro- triazines (HHTs) in the presence of benzyl chloride, afforded tertiaryami
The dynamic structure of Mo-O species in Ag-Mo-P-O catalyst was studied by in situ confocal microprobe laser Raman spectroscopy (LRS) and catalytic test. The re
A new dihydroflavone (1), named macrophyllol A, was isolated from the roots ofUvaria nacrophylla. Its structure was elucidated on the basis of spectroscopic evi
A simple, rapid and low-cost method of separation and determination of homovanillic acid and vanillylmandelic acid in human urine was developed based on capilla
General conditions are given in order to perform a perfect teleportation process in the case where theHilbert spaces involved have different dimensions. An expl
The reaction of bis-benzimidazolium salts with sodium hydrogen telluride is reported,and a new synthetic method for dialdehydes is provided.
Reduction of δ-alkoxy enal 1 and 4 by sodium borohydride in methanol with a catalytic amount of magnesium methoxide gave unexpected methoxylated poducts 3 and
Nanoporous TiO2 photocatalysts were prepared by use of controlled drying method with surfactants. The surface area and porous properties are dependent on the ch