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  • 1
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: As epoxy curing agents three alkenyl succinic anhydrides (ASA) with varying side chain length (2-octenyl, 2-dodecenyl and 2-hexadecenyl succinic anhydride) were prepared by the ene synthesis and thermal and mechanical properties of a bisphenol A epoxy resin cured with the ASA's were measured. With increase in the side chain length of the ASA the Tg, the tensile strength and the impact strength decreased. All the cured samples exhibited excellent transparency and flexibility.
    Additional Material: 4 Ill.
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 222 (1994), S. 103-109 
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Neue aromatische Polyamidimide (PAI) wurden durch Reaktion von Torlon® 4203L (ein handelsübliches PAI) mit verschiedenen Halogenalkanen (Methyliodid, Ethyliodid, n-Butylbromid) hergestellt. Die Glastemperaturen dieser amorphen PAI liegen zwischen 238 und 276°C, die Grenzviskositäten betragen 51 bis 53 mL/g. Die PAI sind leicht löslich in polaren, aprotischen Lösungsmitteln wie z.B. N-Methylpyrrolidon, Dimethylformamid, Dimethylacetamid u.a. Der Einbau der Alkylsubstituenten in die Amidgruppen der PAI verbesserte die Verarbeitbarkeit aus der Schmelze, verringerte allerdings die thermischen Eigenschaften im Vergleich zu einem konventionellen PAI. Die bei 330°C und einer Frequenz von 0,1 rad/s gemessenen Schmelzviskositäten der hergestellten PAI betragen 103-105 Pa.s. Andererseits sind die Schmelzviskositäten der modifizierten PAI geringer als die von Torlon® 4203L, das mit dem konventionellen Polyetherimid Ultem-1000 vergleichbar ist.
    Notes: New aromatic polyamide-imides (PAI) containing various alkyl substituents were prepared by the substitution reaction of Torlon® 4203L (commercialized PAI resin) with the corresponding alkyl halides such as methyl iodide, ethyl iodide, and n-butyl bromide. The resulting amorphous PAIs with glass transition temperatures ranging from 238 to 276°C had inherent viscosities in the range of 51 to 53 mL/g. These polymers were readily soluble in aprotic polar solvents such as N-methylpyrrolidone, dimethylformamide, dimethyl acetamide, etc. Furthermore, the incorporation of various alkyl substituents into amide groups of the PAI resin increased the melt processability, but slightly decreased the thermal properties compared with conventional PAI resin. The melt viscosities of resulting PAIs determined at 330°C under the frequency of 10-1 rad/sec were in the range of 103-105 Pa.s. On the other hand, the modified PAIs showed significantly lower melt viscosities than Torlon® 4203L, which was almost comparable to the conventional polyetherimide, Ultem-1000.
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 233 (1995), S. 89-101 
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Neuartige Poly(amidimid)e (PAI) mit aliphatischen Diaminen als Comonomersegmente wurden durch Polykondensation von Trimellitsäureanhydridchlorid mit gemischten Aminen hergestellt. Die Ergebnisse von Copolymerisationsversuchen mit verschiedenen alicyclischen Diaminen ließen Isophorondiamin (IPDA) als geeigneteres Comonomeres für Poly(amidimid)e erscheinen. Die erhaltenen Copoly(amidimid)e zeigten, daß die IPDA-Segmente im Vergleich zu aromatischen Diaminen, die in einer vorangehenden Arbeit beschrieben wurden, starrer sind als m-BAPS und 4,4′-Diaminodiphenylether, jedoch weniger starr als m-PDA. Die hergestellten PAIs besitzen gute mechanische Eigenschaften mit Zugfestigkeiten von 105 ∼ 118 mPa. Die Glastemperaturen liegen je nach Molekulargewicht und dem eingesetzten Comonomeren zwischen 232°C und 301°C. Die Löslichkeit konnte durch den aliphatischen Charakter des IPDA erhöht werden. Auch die rheologischen Eigenschaften verbesserten sich im Vergleich zu konventionellem PAI. Die Schmelzviskositäten der Copolymeren lagen zwischen 1.6 · 103 und 2.1 · 103 Pa · s. Die beschriebenen PAIs könnten sich somit zur Herstellung von aus der Schmelze verarbeitbaren Hochleistungspolymeren eignen.
    Notes: New poly(amideimide)s (PAI) containing aliphatic diamines as comonomers were synthesized by polycondensation of trimellitic anhydride chloride with mixed diamines. Preliminary results of copolymerization with various alicyclic diamines suggested that isophoronediamine (IPDA) is more preferable as a comonomer for PAI. The copolyamide imides with IPDA showed that IPDA is more rigid than mbisaminophenoxydiphenylsulfoneSystematic name: 4,4′-Sulfonylbis(1,3-phenylenoxy)dianiline. (m-BAPS) and 4,4′-diaminodiphenyl ether (ODA), but less than m-phenylenediamine (m-PDA). And they showed good mechanical properties with 105 ∼ 118 MPa of tensile strength and Tg's were ranged 232 ∼ 301 °C depending on molecular weight and comonomers. The solubility was improved due to the aliphatic character of IPDA in the copolymers. Rheological properties were also improved compared with conventional PAI. The melt viscosity of the copolymers ranged 1.6 · 103 ∼ 2.1 · 103 Pa · s, thus, the reported PAIs may be considered to be new candidates for melt processable high-performance polymer materials.
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  • 4
    Electronic Resource
    Electronic Resource
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 28 (1990), S. 3179-3184 
    ISSN: 0887-624X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Ill.
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  • 5
    Electronic Resource
    Electronic Resource
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 32 (1994), S. 175-179 
    ISSN: 0887-624X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Ill.
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  • 6
    Electronic Resource
    Electronic Resource
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 26 (1988), S. 1507-1517 
    ISSN: 0887-624X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: In order to study the synthesis and properties of polysulfonamides containing thiophene links, 2,2-bis(5-chlorosulfonyl-2-thienyl)propane [BCTP], 2,2-bis(5-chlorosulfonyl-2-thienyl)butane [BCTB], 1,1-bis(5-chlorosulfonyl-2-thienyl)cyclohexane [BCTC], and 2,4-dichlorosulfonyl thiophene [DCST] were prepared and interfacial polycondensations with various aliphatic diamines were carried out. The resulting polymers had inherent viscosities in the range of 0.13-0.41 dL/g and showed high extent of moisture absorptions. Most of the polysulfonamides were soluble in electron-donating solvents such as pyridine, DMF, DMSO, NMP, etc. These polysulfonamides exhibited relatively good thermal stabilities. The TGA data revealed 5% weight losses at 275-405°C and residual weights at 500°C were 13-40% under nitrogen. It was also found that dithienyldisulfonyl chlorides produced more thermally stable polymers than DCST, which were comparable to common polysulfonamides from aromatic disulfonyl chlorides.
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  • 7
    Electronic Resource
    Electronic Resource
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 27 (1989), S. 2417-2426 
    ISSN: 0887-624X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A series of polyketones containing thiophene links was synthesized by the Friedel-Crafts polymerization of these dithienylalkanes with aromatic diacid chlorides or dicarbonyl chlorides comprising thiophene links with diphenyl compounds. The resulting polymers had inherent viscosities in the range of 0.11-0.27 dL/g and showed poor solubilities to common organic solvents except strong acids. These thiophene-based polyketones exhibited fairly good thermal stabilities. The TGA data revealed 5% weight losses at 375-450°C and residual weights at 500°C were 43-79% under nitorgen. It was found that the thermal stabilities of these polymers were superior to those of polymides or polysulfonamides containing thiophene links and almost comparable to common aromatic polyketones
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  • 8
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Letters Edition 27 (1989), S. 443-449 
    ISSN: 0887-6258
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 5 Ill.
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  • 9
    Electronic Resource
    Electronic Resource
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 25 (1987), S. 1781-1791 
    ISSN: 0887-624X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A novel diisocyanate monomer, thiophene-2,5-diisocyanate (ThDI) was prepared from readily available adipic acid via the intermediate formation of thiophene-2,5-dicarboxylic acid chloride (ThDAC) and thiophene-2,5-dicarboxylic acid azide (ThDAA) which was subjected to a Curtius rearrangement. Polyurethanes and polyureas containing 2,5-thiophenylene linkage were synthesized by the polycondensation of thiophene-2,5-diisocyanate with various diols and diamines, respectively, in N,N-dimethylformamide. Polymerization conditions were optimized and the high yields of polymers were obtained. The identity of ThDI, model compounds, and the resulting polymers was confirmed by elemental analysis and spectroscopic methods. These polyurethanes and polyureas were found to have inherent viscosities in the range of 0.33-0.68 dL/g. Some physical properties of these polymers were also investigated.
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  • 10
    Electronic Resource
    Electronic Resource
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 30 (1992), S. 1575-1581 
    ISSN: 0887-624X
    Keywords: polyarylates ; pendant silyl group ; two-phase polycondensation ; tough films ; good thermal stabilities ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Polyarylates containing pendant silyl group were prepared by the phase-transfer catalyzed, two-phase polycondensations of 2,2-bis (4-hydroxyphenyl) propane with corresponding dicarbonyl chlorides such as 2-trimethylsilylterephthaloyl chloride, 5-trimethylsilylisophthaloyl chloride, 5-dimethylphenylsilylisophthaloyl chloride, and 5-triphenylsilylisophthaloyl chloride. The resulting amorphous polyarylates with glass transition temperatures of 163-214°C had inherent viscosities in the range of 0.41-0.95 dL/g. These polyarylates were readily soluble in common chlorinated hydrocarbons and it was possible to obtain transparent, flexible, and tough films from the polymer solutions. The prepared polyarylates showed fairly good thermal stabilities as well as tensile strengths, i.e., the tensile strengths of the cast films from chloroform solution were 6.0-6.7 kg/mm2. And TGA data revealed 10% weight losses and residual weights at 800°C were 437-495°C and 27-40% under nitrogen atmosphere, respectively. © 1992 John Wiley & Sons, Inc.
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