Presence Of Anhydrous Aluminum Chloride Research Articles

Rheological Modification for Asphaltic Materials Using a Mixture (Poly carbonate: Poly Methyl Methacrylate) and Microwave Radiation

Obtaining asphalt that suits the nature of the countries it is used in, is of great importance. Asphalt constitutes an important component in the paving of roads, mastic and flattening substance. This study was included the modification of the asphaltic material by the use of a mixture of polycarbonate and polymethyl methacrylate after crushed to obtain low molecular weight. The study included two paths: In the first asphaltic materials was treated with different percentages of a mixture in the presence of anhydrous aluminium chloride (0.06%of weight) as a catalyst for this reaction. The mixture was heated at 150° for 30 minutes. In the second path, the process of mixing was performed with the existence of a 360 watt microwave radiation for 15 minutes. The process of mixing was repeated in the presence of sulphur (1% of weight) instead of anhydrous aluminium chloride and under the same conditions. Properties of the original and modified asphalts were determined, and this included the measurement of ductility, penetration, softening point, penetration index and calculating the percentage of separated asphaltenes. Additionally, Marshal test, chemical Immersion test and aging were measured for some of the samples. Good samples that can suit Iraq's climate were obtained from this study.

The rheological properties of asphalt modified by commercial adhesive (Ethylene-vinyl acetate) and air blowing process

In this study, we modify the rheolgical prioperties of asphaltic materials by addative and air blowing. For this process, asphaltic materials have been oxidized by air blowing in the presence of anhydrous aluminum chloride as a catalyst for this process . Air blowing was conducted in different condtions of temperature and times using 0.5%(by weight) from catalyst, after determining the optimal conditions for air blowing, we changged the percentage of catalyst to get the optimal perecentage which can be using in modified process, then the asphalt was treated with the commercial adhesive (EVA) in two phaths: The first path was included addtion of different percentages from commercial adhesive under the optimal condition from air blowing and perecentage of alaminum chloride. The second path was included dissolved the commercial adhesive in the toluene and then the modified process was conducted at same conditions in the first path, ( toluene was added to the commercial adhesive by ratio (1:6) (weight of commercial adhesive: ml of toluene). The results showe rheological properties that are compeletly differentj from the original asphaltic materials . The study was gave modified asphaltic materials that can be using in different fields, some samples can be using in paving as in samples (AS19, AS24, AS25) and other as mastic or as flattening as in samples (AS15, AS16, AS17, AS21, AS22). The usage of asphalitic materials in various fields depends on the measurments of different properties such as (ductility, penetration, softining point ,asphaltens percentage, penetration index ,aging test, marshall test).

Conjugated microporous polymers for near-infrared photothermal control of shape change

Herein, a facile and highly efficient synthetic method to prepare organic photothermal materials with high photo-stability and outstanding photothermal performance is reported. Through direct polymerization of commercial aromatic monomers in the presence of anhydrous aluminium chloride and dichloromethane, four kinds of conjugated microporous polymers (CMPs) were obtained. Detailed structural analysis confirmed that the resultant CMPs possessed abundant micropores with an extended π-conjugated skeleton. Under near-infrared (NIR) light irradiation (808 nm, 1.0 W cm−2), all the CMPs showed fast heating-up behavior with their maximum temperatures higher than 150°C. Moreover, the efficiency of photothermal conversion ( η ) of the CMPs was found to increase linearly with the increase in the number of conjugated benzene rings within the monomer. Poly-TPE from tetraphenylethylene (TPE) and Poly-TP from o -terphenyl (TP) showed high η values of over 47%. Poly-TPE was additionally used as a photothermal filler to remotely and spatially control the shape recovery of thermal-sensitive shape memory polymers (SMPs), while its introduction (1 wt%) had little influence on the thermal and mechanical properties of the polymer matrixes. Owing to their excellent NIR photothermal performance as well as a one-step synthetic preparation, these CMPs may be promising photothermal materials for practical applications.

Synthesis, characterization and Cytotoxicity Evaluation of New Compounds from Oxazol-5(4H)-ones and Oxazoles Class Containing 4-(4-Bromophenylsulfonyl)phenyl Moiety

Steiger N-acylation of a-alanine with 4-(4-bromophenylsulfonyl)benzoyl chloride led to 2-[4-(4-bromophenylsulfonyl)benzamido]propanoic acid. This compound underwent intramolecular cyclization in the presence of N-methylmorpholine and ethyl chloroformate or acetic anhydride to the corresponding saturated azlactone. Then acylaminoacylation of dry aromatic hydrocarbons with 2-[4-(4-bromophenylsulfonyl)phenyl]-4-methyloxazol-5(4H)-one or 2-[4-(4-bromophenylsulfonyl) benzamido ]propanoyl chloride in the presence of anhydrous aluminum chloride led to corresponding a-acylamino ketones. These new intermediates were heterocyclized under the action of phosphorus oxychloride or concentrated sulfuric acid in the presence of acetic anhydride to the corresponding oxazoles. The newly synthesized compounds were characterized by spectral studies (FT-IR, UV-Vis, MS, 1H- and 13C-NMR) and elemental analysis. The purity of the new compounds was evaluated by RP-HPLC. The experimental research regarding to the in vitro cytotoxic activity of the new compounds were performed using Daphnia magna bioassay.

Synthesis and Characterization of New Isatin Nucleosides

In this research, a series of new nucleoside analogues 25–36 of substituted isatin as nucleobase were synthesized in three steps. The reaction sequence is started from the condensation of free sugar (D-glucose and L-rhamnose) with different anilines to afford the N-arylglycosylamines 1–12 which subsequently O-acetylated in the presence of acetic anhydride/pyridine. The resulting acetylated N-arylglycosylamines 13–24 were then subjected to an intramolecular cyclization with oxalyl chloride in the presence of anhydrous aluminum chloride to yield the target isatin nucleosides. The synthesized compounds were characterized by the FTIR, 1H-NMR and13 C-NMR spectroscopy. The stereochemistry was established based on the coupling constants observed between vicinal hydrogens of the glycon that confirmed the β-configuration of the synthesized nucleosides with a 4C1 conformation of the glucosides and a 1C4 conformation of the rhamnosides.

Study on In-situ Compatibilized Polyvinyl Chloride/Polystyrene Blends Catalyzed by Anhydrous Aluminum Chloride

In order to improve the compatibility of the blend, the in-situ compatibilization of polyvinyl chloride and polystyrene blends (PVC/PS) were prepared successfully in the presence of anhydrous aluminum chloride. The structure of PVC/PS blends was characterized by FTIR. The peaks of 1943 cm-1and 838 cm-1 in FTIR spectrum revealed that the substitution for para-position of benzene was realized. The properties of PVC/PS blends were characterized by SEM, DSC, and tests of mechanical properties. The results show that adding appropriate amount of PS, anhydrous alluminium chloride and styrene, the interface adhesion of PVC/PS blends increased. The tensile strength increased from 49.35 MPa to 61.03 MPa, the notched impact strength of PVC/PS blends reached 5.3 kJ /m2, compared with 3.9 kJ /m2 of PVC, increased by 35.9%. The glass-transition temperature of PVC/PS blends is 89℃ between 83℃ of PVC and 106℃ of PS. The optimum adding amount of PS, anhydrous aluminum chloride and styrene is 6%, 0.6% and 9%, respectively.

SYNTHESIS, COMPUTER AIDED SCREENING AND PHARMACOLOGICAL EVALUATION OF 2/3-SUBSTITUTED-6(4-METHYLPHENYL)-4,5-DIHYDROPYRIDAZIN3(2H)-ONES, AND PYRIDAZINE SUBSTITUTED TRIAZINE

The present research work involved synthesis of some novel pyridazine derivatives and evaluation of their analgesic and anti-inflammatory activities in experimental animals to obtain safer non-steroidal anti-inflammatory drugs (NSAIDs). Friedal craft acylation reaction of succinic anhydride with toluene in the presence of anhydrous aluminum chloride gave 4-(4-methylphenyl)-4-oxo-butanoic acid ( 1) . The aryl propionic acid 1 on reaction with phenyl hydrazine and hydrazine hydrate yielded the pyridazinone derivative 2 and 3 , respectively. Reaction of the compound 3 with phosphorus oxychloride (POCl 3 ) produced the corresponding chloropyridazine derivative 4 . A 4-hydroxymethyl derivative of dihydropyridazinone ( 5) was synthesized by condensing 3 with methanol and formaldehyde (HCHO). The compound 5 on further treatment with guanidine hydrochloride in ethanol gave the pyridazino-triazine ( 6) . The synthesized compounds were investigated for their analgesic activity in mice and anti-inflammatory activity in Wistar albino rats. The molecular, pharmacokinetic and toxicity properties of the synthesized compounds were calculated by Molinspiration and Osiris property explorer software. The results of in-vivo anti-inflammatory studies revealed that the compound. 4 showed maximum inhibition in paw edema volume followed by compound no. 3 while the compound no. 4 exhibited excellent peripheral analgesic activity ( 74%) followed by the compound no. 5 . Compound no. 4 and 5 also showed good central analgesic effect increased the reaction time to 90 minutes. All the title compounds except compound 5 are predicted to be safe by Osiris online software and are likely to have good oral bioavailability as they obey Lipinski’s rule of five for drug likeness.

UV resistance and dimensional stability of wood modified with isopropenyl acetate

Chemical modification of Rubberwood (Hevea brasiliensis Müll.Arg) with isopropenyl acetate (IPA) in the presence of anhydrous aluminum chloride as a catalyst has been carried out under solvent free conditions. The level of modification was estimated by determining the weight percent gain and modified wood was characterized by FTIR-ATR and CP/MAS 13C NMR spectroscopy. The effect of catalyst concentration on WPG was studied. UV resistance, moisture adsorption and dimensional stability of modified wood were evaluated. UV resistance of modified wood was evaluated by exposing unmodified and modified wood to UV irradiation in a QUV accelerated weathering tester. Unmodified wood showed rapid color changes and degradation of lignin upon exposure to UV light. Chemical modification of wood polymers with IPA was effective in reducing light induced color changes (photo-yellowing) at wood surfaces. In contrast to unmodified wood, modified wood exhibited bleaching. FTIR analysis of modified wood exposed to UV light indicated stabilization of wood polymers against UV degradation. Modified wood showed good dimensional stability and hydrophobicity. Thermogravimetric analysis showed that modification with IPA improved thermal stability of wood. Improved dimensional stability and UV resistance of modified wood indicates IPA as a promising reagent since there is no acid byproduct of reaction as observed in case of other esterification reactions.

Application of plackett-burman design to benzylation of o-cresol with benzyl alcohol

Plackett-Burman design was employed to study the reaction of o-cresol with benzyl alcohol in the presence of anhydrous aluminium chloride as catalyst for screening variables. The variables chosen for the investigation were temperature, molar ratio of o-cresol to benzyl alcohol, amount of anhydrous AlCl3 catalyst (% by wt. of o-cresol), addition time (ta h), stirring time (ts h), stirring speed (rpm). Among these variables temperature, molar ratio of o-cresol to benzyl alcohol and amount of anhydrous AlCl3 were found to be important. A set of trials was planned according to a 3 factor 2-level Yates pattern experimental design with 2 replicates and the center point trial with 4 replicates. The critical response was the yield of benzyl o-cresol. Main effects as well as two- and three- factor interaction effects were statistically significant. A polynomial model was developed and the adequacy of the suggested model was checked up.Bangladesh J. Sci. Ind. Res. 50(3), 169-180, 2015

Synthesis and characterization of novel organosoluble poly(aryl ether ketone)s and poly(aryl ether ketone sulfone)s containing 1,4-naphthylene units

Two monomers containing naphthalene, 4,4′-di(1-naphthoxy)benzophenone (DNOBN) and 4,4′-bis(1-naphthoxy)diphenyl sulfone (BNODPS), were prepared by the condensation reactions of 4,4′-difluorobenzophenone and 4,4′-dichlorodiphenyl sulfone with 1-naphthol, respectively. Novel poly(aryl ether ketone)s (PAEKs) and poly(aryl ether ketone sulfone)s containing 1,4-naphthylene units were synthesized from DNOBN and BNODPS via the electrophilic Friedel–Crafts acylation polycondensation with various aromatic diacid dichlorides, in the presence of anhydrous aluminum chloride and N-methyl-2-pyrrolidone in 1,2-dichloroethane. Because of the incorporation of 1,4-naphthylene units, the resulting PAEKs and poly(aryl ether ketone sulfone)s exhibited outstanding thermal stability and improved solubility in common organic solvents. The glass transition temperatures are above 200°C, and the temperatures at a 5% weight loss are above 548°C under nitrogen atmosphere. All these polymers are amorphous and can form strong, transparent, and flexible films with tensile strengths of 89.4–100.6 MPa, Young’s moduli of 2.13–2.65 GPa, and elongations at break of 15.5–25.3%. All these polymers had low dielectric constants of 2.70–2.89 at 1 MHz and low water sorption of 0.51–0.59%.

Synthesis and thermal behavior of gem-dinitro valerylated polystyrene

Commercial polystyrene has been chemically modified with 4,4-dinitro valeryl chloride by use of Friedel–Crafts acylation reaction in the presence of anhydrous aluminum chloride in a mixture of 1,2-dichloroethane and nitrobenzene. The modified polystyrene containing –COCH2CH2C(NO2)2CH3 fragments in side phenyl rings, named gem-dinitro valerylated polystyrene (GDN-PS), was characterized by an Ubbelohde’s viscometer, FTIR, and 1H NMR spectroscopy. Simultaneous thermogravimetry–differential thermal analysis and differential scanning calorimetry (DSC) have been used to study thermal behavior of the polymer. The results of TG analysis revealed that the main thermal degradation for the GDN-PS occurs during two temperature ranges of 200–300 and 300–430 °C. The DTA curve of GDN-PS is showing a visible exothermic peak at 253.8 °C corresponding to the decomposition of gem-dinitro valeryl groups. The decomposition kinetic of the gem-dinitro groups for GDN-PS with degree of substitution (DS) 11 % was studied by non-isothermal DSC under various heating rates. Kinetic parameters such as activation energy and frequency factor for thermal decomposition of GDN-PS with DS 11 % were evaluated via the ASTM E698 and two isoconversional methods.

Synthesis of New Pyrazoline - Phenoxathiin Derivatives

Phenoxathiin was prepared by the reaction of diphenyl ether with sulfur in the presence of anhydrous aluminum chloride. This work comprised the synthesis of new phenoxathiin derivatives containing heterocyclic moieties. These heterocyclic compounds were synthesized in three groups. The first group was made up of 2-(oxoalken-1-yl) phenoxathiin derivatives (3a-3j) obtained from the reaction of 2-acetylphenoxathiin with different aromatic aldehyde in the presence of sodium hydroxide. The other two groups involved compounds produced from the reaction of (3a-3j) with hydrazine hydrate in acetic acid to get 2-(1-acetyl pyrazolin-3-yl) phenoxathiin derivatives (4a-4j), and phenyl hydrazine in the presence of piperidine to afford 2-(1-phenyl pyrazolin-3-yl) phenoxathiin derivatives (5a-5j). All these compounds of two groups above were substituted in position (5) in pyrazoline ring with different aryl groups according to aromatic aldehyde used in the preparation of the first group series compounds.

Synthesis of New Pyrazoline - Phenoxathiin Derivatives

Phenoxathiin was prepared by the reaction of diphenyl ether with sulfur in the presence of anhydrous aluminum chloride. This work comprised the synthesis of new phenoxathiin derivatives containing heterocyclic moieties. These heterocyclic compounds were synthesized in three groups. The first group was made up of 2-(oxoalken-1-yl) phenoxathiin derivatives (3a-3j) obtained from the reaction of 2-acetylphenoxathiin with different aromatic aldehyde in the presence of sodium hydroxide. The other two groups involved compounds produced from the reaction of (3a-3j) with hydrazine hydrate in acetic acid to get 2-(1-acetyl pyrazolin-3-yl) phenoxathiin derivatives (4a-4j), and phenyl hydrazine in the presence of piperidine to afford 2-(1-phenyl pyrazolin-3-yl) phenoxathiin derivatives (5a-5j). All these compounds of two groups above were substituted in position (5) in pyrazoline ring with different aryl groups according to aromatic aldehyde used in the preparation of the first group series compounds.

Synthesis and properties of novel random copolymers of poly(ether ketone ether ketone ketone)–poly(ether ketone sulfone imide)

The monomer containing sulfone and imide linkages, namely bis[4-( p-phenoxybenzoyl)-1,2-benzenedioyl]- N, N, N′, N′-4,4′-diaminodiphenyl sulfone (BPBDADPS), was prepared by the Friedel–Crafts reaction of bis(4-chloroformyl-1,2-benzenedioyl)- N, N, N′, N′-4,4′-diaminodiphenyl sulfone with diphenyl ether. Novel random copolymers of poly(ether ketone ether ketone ketone)–poly(ether ketone sulfone imide) were synthesized by the electrophilic Friedel–Crafts acylation polycondensation of terephthaloyl chloride with a mixture of 4,4′-diphenoxybenzophenone and BPBDADPS in the presence of anhydrous aluminum chloride and N-methylpyrrolidone in 1,2-dichloroethane. The random copolymers with 10–35 mol% BPBDADPS are semicrystalline and had remarkably increased glass transition temperatures ( Tgs) over the conventional poly(ether ether ketone) and poly(ether ketone ketone) due to the incorporation of polar sulfone and imide linkages in the main chains. The copolymers IV and V with 30–35 mol% BPBDADPS had not only high Tgs of 184–186°C but also moderate melting temperatures ( Tms) of 336–340°C, having good potential for melt processing. The copolymers IV and V had tensile strengths of 100.8–103.6 MPa, Young’s moduli of 2.31–2.48 GPa, and elongations at break of 10.9–12.4% and exhibited high thermal stability and good resistance to organic solvents.

Synthesis and properties of novel random copolymers of poly(ether ketone ether ketone ketone)–poly(ether ketone imide)

Bis[4-(p-phenoxybenzoyl)-1,2-benzenedioyl]-N,N,N',N'-4,4'-diaminodiphenyl ether (BPBDADPE) was prepared by the Friedel-Crafts acylation reaction of diphenyl ether (DPE) with bis(4-chloroformyl-1,2-benzenedioyl)-N,N,N',N'-4,4'-diaminodiphenyl ether (BCBDADPE). Novel random copolymers of poly(ether ketone ether ketone ketone)(PEKEKK)–poly(ether ketone imide)(PEKI) were synthesized by the modified electrophilic Friedel-Crafts copolycondensation of terephthaloyl chloride (TPC) with a mixture of 4,4'-diphenoxybenzophenone (DPOBPN) and BPBDADPE, over a wide range of DPOBPN/BPBDADPE molar ratios, in the presence of anhydrous aluminum chloride and N-methylpyrrolidone (NMP) in 1,2-dichloroethane (DCE). The random copolymers with 10–40 mol% BPBDADPE are semicrystalline and had much higher T gs than those of the conventional PEEK and PEKK due to the incorporation of imide linkages in the main chains. The copolymers IV and V with 30–40 mol% BPBDADPE had not only high T gs of 185–188 °C, but also moderate T ms of 338–340 °C, having good potential for melt processing. The copolymers IV and V had tensile strengths of 102.1–105.3 MPa, Young’s moduli of 2.22–2.43 GPa, and elongations at break of 14.1–15.9 % and exhibited high thermal stability and good resistance to organic solvents.

Facile synthesis of dihydrochalcones via the AlCl3-promoted tandem Friedel–Crafts acylation and alkylation of arenes with 2-alkenoyl chlorides

Tandem Friedel–Crafts acylation and alkylation of arenes with 2-alkenoyl chlorides were investigated under the catalysis of Lewis acids. The cascade reaction affords dihydrochalcones in good yields accompanying 1-indanone derivatives in some cases, in the presence of anhydrous aluminum chloride. The scope, limitation, and mechanism of the tandem reaction were also explored. The intermolecular Friedel–Crafts alkylation for the formation of dihydrochalcones is more favorable than the intramolecular one for the generation of 1-indanones in the tandem reaction due to a stable six-membered ring transition state. The sequent process was further studied by the DFT computations at the M06-2X/6-31G(d) level, which are in great agreement with the experimental observation and support the proposed mechanism. The current method provides a convenient and economic method to synthesis of dihydrochalcones.

Alkylation of Ethylbenzene with Cyclohexylchloride: A Statistical Study

A mathematical model was developed for the alkylation of ethylbenzene with cyclohexyl chloride in the presence of anhydrous aluminium chloride as a catalyst using the Yates Pattern experimental design. The variables chosen for the study were temperature, molar ratio of ethylbenzene to cyclohexyl choloride and amount of anhydrous aluminium chloride. The critical response was the yield of cyclohexylethylbenzene. Main effects as well as interaction effect of molar ratio of ethylbenzene to cyclohexyl chloride and amount of catalyst were statistically significant. The adequacy of the suggested model was checked.DOI: http://dx.doi.org/10.3329/dujs.v60i1.10340 Dhaka Univ. J. Sci. 60(1): 71-76 2012 (January)

Synthesis of aromatic poly(ether amide amide ether ketone ketone)s by electrophilic Friedel–Crafts solution polycondensation

AbstractA new monomer, N,N′‐bis(4‐phenoxybenzoyl)‐p‐phenylenediamine (BPBPPD), was prepared by the condensation of p‐phenylenediamine with 4‐phenoxybenzoyl chloride in N,N‐dimethylacetamide (DMAc). Novel aromatic poly(ether amide amide ether ketone ketone)s (PEAAEKKs) were synthesized by electrophilic Friedel–Crafts solution copolycondensation of BPBPPD with a mixture of terephthaloyl chloride (TPC) and isophthaloyl chloride (IPC), over a wide range of TPC/IPC molar ratios, in the presence of anhydrous aluminum chloride and N‐methylpyrrolidone (NMP) in 1,2‐dichloroethane (DCE). The influences of reaction conditions on the preparation of polymers were examined. The polymers obtained were characterized by different physico–chemical techniques such as FT‐IR, Differential scanning calorimetry (DSC), Thermogravimetric analysis (TGA), and wide angle X‐ray diffraction (WAXD). The polymers with 70–100 mol% IPC are semicrystalline and have remarkably increased Tgs over commercially available poly(ether ether ketone) (PEEK) and poly(ether ketone ketone) (PEKK) due to the incorporation of amide groups in the main chain. The polymers with 70–80 mol% IPC had not only high Tgs of 209–213°C, but also moderate Tms of 339–348°C, which are suitable for melt processing. The polymers with 70–80 mol% IPC had tensile strengths of 107.5–109.8 MPa, Young's moduli of 2.53–2.69 GPa, and elongations at break of 9–11% and exhibited high thermal stability and good resistance to organic solvents. Copyright © 2009 John Wiley & Sons, Ltd.

Novel soluble aromatic poly(ether amide sulfone amide ether ketone ketone)s by electrophilic solution polycondensation

A new monomer, N,N '-bis(4-phenoxybenzoyl)-4,4'-diaminodiphenyl sulfone (BPBDAS), was prepared by the condensation of 4,4'-diaminodiphenyl sulfone with 4-phenoxybenzoyl chloride in N,N-dimethylacetamide. Novel soluble aromatic poly(ether amide sulfone amide ether ketone ketone)s (PEASAEKKs) were synthesized by electrophilic solution copolycondensation of BPBDAS with a mixture of terephthaloyl chloride and isophthaloyl chloride in the presence of anhydrous aluminum chloride and N-methylpyrrolidone in 1,2-dichloroethane. The influences of reaction conditions on the preparation of polymers were examined. All these polymers are amorphous and soluble in aprotic polar solvents due to the incorporation of 4,4'-dibenzoylaminodiphenyl sulfone moieties in the main chain. Thermal analyses showed that the polymers had high Tg values of 236—259 °C and exhibited high thermal stability. All the polymers formed transparent, strong, and flexible films, with tensile strengths of 97.6—103.7 MPa, Young’s moduli of 2.12—2.45 GPa, and elongations at break of 10.6—13.8%.

Synthesis of copolymers of poly(ether sulfone ether ketone ketone) and poly(ether ketone diphenyl ketone ether ketone ketone) by electrophilic Friedel-Crafts solution polycondensation

A new monomer, 4,4′-bis(4-phenoxybenzoyl)diphenyl(BPOBDP), was synthesized via a two-step synthetic procedure. A series of novel poly(ether sulfone ether ketone ketone)/poly(ether ketone diphenyl ketone ether ketone ketone) copolymers were prepared by electrophilic Friedel–Crafts solution copolycondensation of isophthaloyl chloride (IPC) with a mixture of 4,4′-diphenoxydiphenylsulfone (DPODPS) and 4,4′-bis(4-phenoxybenzoyl)diphenyl (BPOBDP), in the presence of anhydrous aluminum chloride and N-methylpyrrolidone (NMP) in 1,2-dichloroethane (DCE). The copolymers with 10–50 mol% DPODPS are semicrystalline and have remarkably increased Tgs over commercially available PEEK and PEKK. The copolymers with 40–50 mol% DPODPS had not only high Tgs of 170–172°C, but also moderate Tms of 326–333°C, which are extremely suitable for melt processing. These copolymers have tensile strengths of 96.5–108.1 MPa, Young's moduli of 1.98–3.05 GPa, and elongations at break of 13–26% and exhibit excellent thermal stability and good resistance to acidity, alkali, and common organic solvents. Copyright © 2009 John Wiley & Sons, Ltd.