Synthesis and properties of poly(arylene ether phenyl‐s‐triazine)s

Matsuo, Shigeru

doi:10.1002/pola.1994.080321111

Cited by 23 publications

(16 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Despite these properties, it has been reported to be immiscible or partially miscible with most polymers, even with acrylic polymers. [2][3][4] For this reason, we wanted to find miscible polymer blends based on PVA and to illustrate the effect of high-energy radiation on the structure-property behavior of these blends. In this regard, PVA/carboxymethyl cellulose (CMC) water-soluble polymer blends were used as sorbents for dye wastes.…”

Section: Introductionmentioning

confidence: 99%

Structural properties of γ‐irradiated poly(vinyl alcohol)/poly(ethylene glycol) polymer blends

Alla

Said

El‐Naggar

2004

J of Applied Polymer Sci

View full text Add to dashboard Cite

ABSTRACT:The effect of various doses of ␥ radiation on the structural properties of water-soluble polymer blends based on poly(vinyl alcohol) (PVA) and poly(ethylene glycol) (PEG) has been investigated. Although the aqueous solutions of individual PVA and PEG homopolymers were homogeneous and clear, films transparent to visual observation were only formed by solution casting of pure PVA and those blends containing low ratios of PEG up to 30%. The structure-property behavior of this range of blends before and after ␥ irradiation was investigated by light reflectance and UV absorbance, differential scanning calorimetry (DSC), IR spectroscopy, and tensile mechanical testing. The DSC thermograms of PVA/PEG blends, before or after ␥ irradiation, showed a solely endothermic peak over the temperature range 40 -140°C, which may have arisen from the melting of the PEG component or from the glass transition of PVA/PEG as a miscible blend in accordance with those calculated on the basis of the theoretical Fox equation. Also, these thermograms did not clearly show any transition that arised from the pure PVA component. However, the improvement in tensile mechanical properties of PVA/PEG blends, the reflectance, and the optical absorption measurements support the idea of improved miscibility after ␥ irradiation.

show abstract

Section: Introductionmentioning

confidence: 99%

Structural properties of γ‐irradiated poly(vinyl alcohol)/poly(ethylene glycol) polymer blends

Alla

Said

El‐Naggar

2004

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…Depending on their chemical structure and thermal behavior, phenyl-s-triazine polymers may exist as a thermal plastic or as a thermosetting material [10,11]. As a class of new emerged thermal plastics, poly(aryl ether phenyl-s-triazine)s (PAEPs) are generally amorphous or semi-crystalline polymers with T g s exceeding 240°C as well as acceptable mechanical properties and good chemical resistance [12][13][14][15][16][17]. PAEPs are normally thought of as one of the most thermally stable polyethers.…”

Section: Introductionmentioning

confidence: 99%

Effects of phenyl-s-triazine moieties on thermal stability and degradation behavior of aromatic polyether sulfones

Liu

et al. 2012

J Polym Res

View full text Add to dashboard Cite

The effect of the incorporation of phenyl-striazine units into the main chain of phthalazinone-based polyether sulfones on initial decomposition temperature, activation energy, thermal-mechanical property and possible degradation mechanism has been investigated. To this purpose, decomposition of poly(phthalazinone ether sulfone phenyl-s-triazine) copolymers (PPESPs) of different monomer compositions have been studied by utilizing thermogravimetry and differential scanning calorimetry. Nonisothermal experiments under nitrogen were performed, and the apparent activation energy (E a ) was calculated by isoconversional and conversional methods including the methods of Flynn-Wall-Ozawa, Friedman and Kissinger. In the conversion range (5-30%) studied, solid-state decomposition process of PPESPs is found to be a mechanism involving phase boundary controlled reaction (E a : 189-201 kJ mol −1 ) except that phenyl-s-triazine-rich copolymers exhibit a mechanism involving three-dimensional diffusion (E a : 196-225 kJ mol −1 ) in terms of Coats-Redfern method. The phenyl-s-triazine-rich copolymers display much higher E a and slighter mechanical property-change compared to sulfone-rich copolymers and generic aromatic polyether sulfone, suggesting strong stabilizing effect of the phenyl-striazine moieties.

show abstract

“…[1][2][3][4][5][6][7] tion of flexibilizing groups and bulky units in the polymer backbone. [8][9][10][11][12][13][14][15][16][17][18][19][20][21] Solubility, glass transition Drawbacks of these polymers are their insolubility and intractability, which cause difficulties in temperature, and crystallinity can be adjusted by varying the nature of aromatic ring systems and the number of flexible linkages within the poly-2,2-bis(3,4-dicarboxyphenyl)hexafluoropropane dianhydride (6FDA; 4f, Chriskev) were used as received. Pyromellitic dianhydride (PMDA; 4a, Aldrich) and 3,3,4,4-benzophenonetetracarboxylic dianhydride (BTDA; 4d, Aldrich) were recrystallized from acetic anhydride prior to use.…”

Section: Introductionmentioning

confidence: 99%

“…The solution was continuously stirred at 6.47-6.78 ppm (aromatic protons). 13 b Measured at a concentration of 0.5 g/dL in DMAc-5% LiCl at 30ЊC using a Cannon-Fenske viscometer. c ''2.0 / 1.0'' means that an initial amount of 2 mL was used and additional amount of 1 mL was added when the reaction medium was too viscous to stir.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and properties of polyimides, polyamides and poly(amide-imide)s from ether diamine having the spirobichroman structure

Hsiao

Yang

1997

J. Polym. Sci. A Polym. Chem.

View full text Add to dashboard Cite

A novel spirobichroman unit containing dietheramine, 6,6′‐bis(4‐aminophenoxy)‐4,4,4′,4′,7,7′‐hexamethyl‐2,2′‐spirobichroman (3), was prepared by the nucleophilic substitution of 6,6′‐dihydroxy‐4,4,4′,4′,7,7′‐hexamethyl‐2,2′‐spirobichroman with p‐chloronitrobenzene in the presence of K2CO3 followed by hydrazine catalytic reduction of the intermediate dinitro compound. A series of polyimides were synthesized from diamine 3 and various aromatic dianhydrides by a conventional two‐stage procedure through the formation of poly(amic‐acid)s followed by thermal imidization. The intermediate poly(amic‐acid)s had inherent viscosities of 1.00–2.78 dL/g. All the poly‐(amic‐acid)s could be thermally cyclodehydrated into flexible and tough polyimide films, and some polyimides were soluble in polar solvents such as N‐methyl‐2‐pyrrolidone (NMP), N,N‐dimethylacetamide (DMAc), and N,N‐dimethylformamide (DMF). These polyimides had glass transition temperatures (Tg) in the range of 236–256°C, and 10% weight loss occurred up to 450°C. Furthermore, a series of polyamides and poly(amide‐imide)s with inherent viscosities of 0.71–2.29 dL/g were prepared by direct polycondensation of the diamine 3 with various aromatic dicarboxylic acids and imide ring‐containing dicarboxylic acids by means of triphenyl phosphite and pyridine. All the polyamides and poly(amide‐imide)s were readily soluble in polar solvents such as DMAc, and tough and flexible films could be cast from their DMAc solutions. These polymers had glass transition temperatures in the range of 137–228°C and 10% weight loss temperatures in the range of 419–443°C in air and 404–436°C in nitrogen, respectively. © 1997 John Wiley & Sons, Inc. J Polym Sci A: Polym Chem 35: 1487–1497, 1997

show abstract

Synthesis and properties of poly(arylene ether phenyl‐s‐triazine)s

Cited by 23 publications

References 15 publications

Structural properties of γ‐irradiated poly(vinyl alcohol)/poly(ethylene glycol) polymer blends

Structural properties of γ‐irradiated poly(vinyl alcohol)/poly(ethylene glycol) polymer blends

Effects of phenyl-s-triazine moieties on thermal stability and degradation behavior of aromatic polyether sulfones

Synthesis and properties of polyimides, polyamides and poly(amide-imide)s from ether diamine having the spirobichroman structure

Contact Info

Product

Resources

About