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series of colorless and organosoluble poly(ether-imide)s (PEIs) were prepared from a phenylhydroquinone bis(ether anhydride), i.e., 2,5-bis(3,4-dicarboxyphenoxy)biphenyl dianhydride, and seven trifluoromethyl-containing bis(ether amine)s by the conventional two-stage process via the thermal or chemical imidization of the precursor poly(amic acid)s. The fluorinated PEIs prepared via the chemical imidization procedure had inherent viscosities of 0.46-1.27 dL/g and weight-average molecular weights of 68,000-87,500. The PEIs exhibited good solubility in a variety of organic solvents; they were readily soluble in amide-type polar solvents and chlorinated hydrocarbons on a concentration higher than 10%. The solution-cast films showed a high optical transparency and low color intensity, with an ultraviolet-visible absorption edge of 368-375 nm and a yellowness index of 5.9-9.9. These films were flexible and tough with tensile strengths of 89-114 MPa. They exhibited glass-tranisition temperatures of 198-250°C and 10% weight loss temperatures higher than 488°C in air or nitrogen. In addition, these PEI films also displayed low dielectric constants (3.22-3.52 at 1 MHz) and low moisture absorptions (0.22-0.73 wt%). [ABSTRACT FROM AUTHOR]

A series of electroactive aromatic polyamides with 4-(dimethylamino)triphenylamine [(NMe 2)TPA] units in the backbone were prepared from a newly synthesized diamine monomer, 4,4′-diamino-4′′-(dimethylamino)triphenylamine, and various aromatic dicarboxylic acids via the phophorylation polyamidation reaction. These polyamides are readily soluble in many organic solvents and can be solution-cast into tough and amorphous films. They had useful levels of thermal stability associated with relatively high glass-transition temperatures (277–298 °C), 10% weight loss temperatures in excess of 500 °C, and char yields at 800 °C in nitrogen higher than 67%. The polymer films showed reversible electrochemical oxidation accompanied by strong color changes with high coloration efficiency, high contrast ratio, and rapid switching time. The optical transmittance change (Δ%T) at 640 nm between the neutral state and the fully oxidized state is up to 88%, and the coloration efficiency is as high as ca. 261 cm 2/C with high optical density change (δOD) up to 0.94. The polymers also displayed low ionization potentials as a result of their (NMe 2)TPA moieties. Cyclic voltammograms of the polyamide films on the indium−tin oxide (ITO)-coated glass substrate exhibited a pair of reversible oxidation waves with very low onset potential of 0.35 V (vs Ag/AgCl) in acetonitrile solution. [ABSTRACT FROM AUTHOR]

Two series of new blue photoluminescent aromatic polyesters (polyarylates) were synthesized from 4,4′-dicarboxytriphenylamine and 4,4′-dicarboxy-4″-methyltriphenylamine with various bisphenols by the diphenylchlorophosphate (DPCP) activated direct polycondensation in a medium of pyridine and lithium chloride. These polymers were amorphous and readily soluble in various common organic solvents including DMAc, THF, and chloroform, and could be cast from their chloroform solutions into transparent films due to their excellent solubility. These polyarylates exhibited moderately high T g values (186–264 °C) and thermal stability. In THF solution, these triphenylamine-containing polyarylates showed UV-Vis absorption bands at 359–365 nm and photoluminescence peaks around 427–451 nm in the blue region. [Figure not available: see fulltext.] [ABSTRACT FROM AUTHOR]

A new series of polyarylates containing carbazolyl-substituted triphenylamine units were synthesized by direct polycondensation of 4.4′-dicarboxy-4′-N-carbazolyltriphenylamine with various bisphenols. All polymers were highly soluble in various common organic solvents and could afford tough, transparent, and colorless films by solution casting. These amorphous and organo-soluble polyarylates showed no significant decomposition below 470 °C in both nitrogen and air atmospheres with glass transition temperatures (Tg) ranging from 234 to 287 °C. In THF solution, these polyarylates exhibited blue photoluminescence around 464-476 nm with quantum yield up to 28%. The photoluminescence exhibited solvent effect and was red-shifted in the polar solvent at room temperature. [ABSTRACT FROM AUTHOR]

A series of organic‐soluble polynaphthalimides (PNI) bearing flexible ether links and phthalide cardo group were synthesized from 1,4,5,8‐naphthalenetetracarboxylic dianhydride (NTDA) with 3,3‐bis[4‐(4‐aminophenoxy)‐3‐methylphenyl]phthalide (BAMP) and its equimolar mixtures with other dietheramines by high‐temperature solution polycondensation in m‐cresol. The PNIs had moderate to high inherent viscosities in the range of 1.24–2.25 dL/g and could afford flexible and tough films with tensile strengths of 97–138 MPa by casting their m‐cresol solutions. These PNIs exhibited high thermal stability, with glass transition temperature of 291°C–321°C, 10% weight‐loss temperatures above 542°C, and char yields at 800°C in nitrogen higher than 56%. In comparison with PNIs without the BAMP component, these BAMP‐modified PNIs revealed an enhanced solubility and film‐forming capability. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 104: 1104–1109, 2007 [ABSTRACT FROM AUTHOR]

A novel trifluoromethyl-substituted bis(ether amine) monomer, 1,1-bis[4-(4-amino-2-trifluoromethylphenoxy)phenyl]-1-phenyl-2,2,2-trifluoroethane, was synthesized that led to a series of novel fluorinated polyimides via chemical imidization route when reacted with various commercially available aromatic tetracarboxylic dianhydrides. These polyimides were highly soluble in a variety of organic solvents such as N-methyl-2-pyrrolidone and N, N -dimethylacetamide, and most of them could afford transparent, low-colored, and tough films. These polyimides exhibited glass-transition temperatures ( Tgs) of 227-269 °C and showed no significant decomposition below 500 °C under either nitrogen or air atmosphere. These polyimides had low dielectric constants of 2.87-3.17 at 10 kHz, low water uptake of 0.13%-0.58%, and an ultraviolet-visible absorption cutoff wavelength at 364-410 nm. For a comparative study, a series of analogous polyimides based on 1,1-bis[4-(4-aminophenoxy)phenyl]-1-phenyl-2,2,2-trifluoroethane were also prepared and characterized. [ABSTRACT FROM AUTHOR]

A new N-phenylated amide (N-phenylamide) unit-containing aromatic diamine, 1,4-bis[N-(4-aminobenzoyl)-N-phenyl]phenylenediamine, was prepared by the condensation of NN-diphenyl-1,4-phenylenediamine with 4-nitrobenzoyl chloride, followed by catalytic reduction. Two series of aromatic poly(N-phenylamide-imide)s and poly(N-phenylamide-amide)s with inherent viscosities of 0.25-0.42 and 0.25-0.54 dL g-1 were prepared by a conventional two-stage method and the direct phosphorylation polycondensation, respectively, from the diamine with various aromatic dianhydrides and aromatic dicarboxylic acids. Some polymers based on rigid dianhydrides and diacids were semi-crystalline and insoluble in organic solvents. The other polymers were amorphous and organosoluble and could afford freestanding or tough films via solution casting. These polyimides and polyamides had glass transition temperatures in the range of 248-267 and 177-198C, respectively. Decomposition temperatures of the polyimides for 10% weight loss all occurred above 470C in both nitrogen and air atmospheres. [ABSTRACT FROM AUTHOR]

Two series of 2,7-naphthalenediyl units-containing homoand copoly(ester imide)s were prepared from 2,7-bis(4-aminobenzoyloxy)naphthalene and 2,7-bis(3-aminobenzoyloxy)naphthalene, respectively, with six commercially available aromatic tetracarboxylic dianhydrides and their mixtures via a conventional two-stage synthesis that included ring-opening polyaddition to give poly(amic acid)s followed by chemical imidization to polyimides. The intermediate poly(amic acid)s obtained in the first stage had inherent viscosities of 0.59∼1.15 and 0.51∼1.20 dL g-1, respectively. Some of the poly(ester imide)s derived from less rigid dianhydrides had excellent solubility in polar aprotic solvents such as N-methyl-2-pyrrolidone and N,N-dimethylacetamide and could be solution-cast into transparent, flexible, and tough films. The poly(ester imide)s derived from rigid dianhydrides such as pyromellitic dianhydride (PMDA) and 3,3',4,4'-biphenyltetracarboxylic dianhydride (BPDA) were semicrystalline and showed less solubility. Except for some examples, most of the poly(ester imide)s displayed discernible glass-transition temperatures (T gs) between 233 and 295°C in the differential scanning calorimetry traces. These poly(ester imide)s showed insignificant decomposition below 450°C in nitrogen or air. The investigation of the thermal decomposition of the poly(ester imide)s using pyrolysis-gas chromatography/mass spectrometry (pyrolysis-GC/MS) indicated that a dramatic breakage of the ester linkages occurred at around 450°C, which initiated the polymer chain scission. [ABSTRACT FROM AUTHOR]

Two series of novel polyhydrazides and poly(amide-hydrazide)s are prepared from two ortho-linked bis(ether-carboxylic acid)s including 4,4′-(1,2-phenylenedioxy)dibenzoic acid and 4,4′-(4-tert-butyl-1,2-phenylenedioxy)dibenzoic acid, or their diacyl chlorides with terephthalic dihydrazide (TPH), isophthalic dihydrazide (IPH) and p-aminobenzoyl hydrazide (p-ABH) via the Yamazaki phosphorylation reaction or the low-temperature solution polycondensation. The resulting hydrazide-containing polymers exhibited inherent viscosities in the range of 0.27-0.62 dl g-1. These hydrazide polymers were amorphous and soluble in various solvents such as N-methyl-2-pyrrolidone (NMP), N,N-dimethylacetamide (DMAc), dimethyl sulfoxide (DMSO) and could be solution-cast into colorless, flexible, and tough films with good tensile strengths. Differential scanning calorimetry (DSC) indicated that the polyhydrazides and poly(amide-hydrazide)s had Tg s in the range of 172-200 °C and could be thermally cyclodehydrated into the corresponding oxadiazole polymers in the range of 270-370 °C. The oxadiazole polymers showed a slightly enhanced crystallinity and Tg, but a dramatically decreased solubility compared to their hydrazide prepolymers. The thermally converted oxadiazole polymers exhibited Tg s in the range of 205-221 °C and softening temperatures of 214-239 °C and showed insignificant weight loss up to 450 °C in air or nitrogen. [ABSTRACT FROM AUTHOR]

Studies synthesis and properties of fluorinated polyamides based on 2,7-bis(4-amino-2-trifluoromethylphenoxy)naphthalene. Method of the study; Results and discussion; Conclusion.

A series of fluorinated polyimides were prepared from 1,1-bis[4-(4-aminophenoxy)phenyl]-1-2,2,2-trifluoroethane with various aromatic tetracarboxylic dianhydrides via a conventional two-step procedure. These polyimides were amorphous in nature and afforded flexible and tough films. Some polyimides derived from less stiff dianhydrides were soluble in polar organic solvents. The glass-transition temperatures (Tg) of these polyimides ranged from 252 to 324°C, and softening temperatures (Ts) stayed in the 254∼322°C range. Decomposition temperatures (Td) at 10% weight loss all occurred above 569°C in both air and nitrogen atmospheres. For a comparative study, another series of analogous polyimides based on 1,1-bis[4-(4-aminophenoxy)phenyl]-1-phenylethane were also prepared and characterized. [ABSTRACT FROM AUTHOR]

Presents a study that designed a novel class of organosoluble and strictly alternating poly(amine-amide-imide)s containing triphenylamine units in the main chain. Experimental procedures; Results of the study; Conclusions.