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  • 1
    Digitale Medien
    Digitale Medien
    Synthesis and properties of novel aromatic polyimides of 2,3-bis(4-aminophenoxy)naphthalene (1993)
    s.l. : American Chemical Society
    Macromolecules 26 (1993), S. 4865-4871 
    Details
    ISSN: 1520-5835
    Quelle: ACS Legacy Archives
    Thema: Chemie und Pharmazie , Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1021/ma00070a022
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  • 2
    Digitale Medien
    Digitale Medien
    Synthesis and properties of aromatic polyamides of 2,3-bis(4-aminophenoxy)naphthalene (1993)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 194 (1993), S. 1595-1605 
    Details
    ISSN: 0025-116X
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Physik
    Notizen: A new polymer-forming diamine, 2,3-bis(4-aminophenoxy)naphthalene, was synthesized in two steps from the condensation of 2,3-naphthalenediol and p-chloronitrobenzene, giving 2,3-bis(4-nitrophenoxy)naphthalene, followed by the reduction with hydrazine/Pd-C system. A series of novel aromatic polyamides (aramids) were synthesized by direct polycondensation of the diamine with various aromatic dicarboxylic acids in N-methyl-2-pyrrolidone (NMP) using triphenyl phosphite and pyridine as condensing agents. These aramids have inherent viscosities of 0,70-1,48 dL/g and were obtained in quantitative yield. The polymers are generally soluble in a wide range of solvents, such as N,N-dimethylacetamide, NMP, dimethyl sulfoxide, pyridine, and tetrahydrofuran, and afford transparent, flexible, and tough films upon casting from their solutions. The glass transition temperatures of these aramids are in the range of 242-267°C, and the 10% weight loss temperatures are above 503°C in nitrogen and above 496°C in air.
    Zusätzliches Material: 4 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/macp.1993.021940607
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  • 3
    Digitale Medien
    Digitale Medien
    Synthesis and properties of polyimides derived from 4,4′-(2,7-naphthylenedioxy)dianiline and aromatic tetracarboxylic dianhydrides (1993)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 194 (1993), S. 3061-3069 
    Details
    ISSN: 0025-116X
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Physik
    Notizen: Novel polyimides containing 2,7-diphenoxynaphthalene moieties were prepared from 4,4′-(2,7-naphthylenedioxy)dianiline (DAPON) and various aromatic tetracarboxylic dianhydrides via a two-stage procedure that includes ring-opening polyaddition in a polar solvent such as N,N-dimethylacetamide to give poly(amic acid)s, followed by cyclodehydration to polyimides. The poly(amic acid)s exhibit inherent viscosities between 0,63 and 1,94 dL/g depending on the tetracarboxylic dianhydrides used. Except for the polyimide 4d, obtained from 3,4 : 3′,4′-benzophenonetetracarboxylic dianhydride (2d), all polymides from yellow, flexible, and tough films upon casting from the poly(amic acid) solutions. Polyimide 4ederived from 4,4′-sulfonyldiphthalic anhydride (2e) exhibits better solubility than the other polymides. The polyimides synthesized from and 2d are semicrystalline polymers, whereas the other polyimides are amorphous due to their X-ray diffractograms. Tensile strength and elongation of the DAPON-based polyimide films from 86-107 MPa and 6-25% respectively. These polyimides have glass transition temperature 223 and 285°C. Thermal analyses indicated that these polymers are fairly stable, and the 10% weight loss temperatures were recorded in the ranges 568-581 °C in nitrogen and 557-570°C in air.
    Zusätzliches Material: 1 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/macp.1993.021941110
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  • 4
    Digitale Medien
    Digitale Medien
    New poly(amide-imide)s syntheses, 6.Part 5: cf. ref.14 Preparation and properties of poly(amide-imide)s derived from 2,7-bis(4-aminophenoxy)naphthalene, trimellitic anhydride and various aromatic diamines (1993)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 194 (1993), S. 3071-3080 
    Details
    ISSN: 0025-116X
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Physik
    Notizen: An imide ring-containing dicarboxylic acid, 2,7-bis[4-(N-trimellitoyl)phenoxy]naphthalene (1,1′,3,3′-tetraoxo-2,2′-[2,7-naphthylenedioxybis(1,4-phenylene)]di-1H, 3H-isoindole-5-carboxylic acid (3)), was prepared by condensation of 2,7-bis(4-aminophenoxy)naphthalene (4,4′-(2,7-naphthylenedioxy)dianiline) and trimellitic anhydride (1,2,4-benzenetricarboxylic acid 1,2-anhydride). A series of new aromatic poly(amide-imide)s 5 containing bis(phenoxy)naphthalene moieties having inherent viscosities of 0,8-1,57 dL/g were prepared by direct polycondensation of this diimide-diacid 3 with various aromatic diamines using triphenyl phosphite and pyridine as condensing agents in 1-methyl-2-pyrrolidone (NMP) in the presence of calcium dichloride. Polymers 5 show excellent solubility in polar solvents such as NMP, and most of them could be cast into transparent and tough films. Measurements of wide-angle X-ray diffraction revealed that those polymer containing p-phenylene or oxyphenylene groups are partially crystalline. Amorphous members exhibit glass transition temperature in the range of 250-311°C. Thermal analyses indicated that these polymers are fairly stable, and the 10% weight loss temperature were recorded in the ranges of 526-575°C in nitrogen and 481-556°C in air.
    Zusätzliches Material: 5 Tab.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/macp.1993.021941111
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  • 5
    Digitale Medien
    Digitale Medien
    Synthesis and properties of aromatic polyamides derived from 2,7-bis(4-aminophenoxy)napthalene and aromatic dicarboxylic acids (1992)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 193 (1992), S. 2323-2331 
    Details
    ISSN: 0025-116X
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Physik
    Notizen: 2,7-Bis(4-aminophenoxy)naphthalene, a new polymer-forming diamine, was synthesized in two steps by the preparation of 2,7-bis(4-nitrophenoxy)naphthalene from 2,7-dihydroxynaphthalene and p-chloronitrobenzene and subsequent reduction with a 10% Pd-C catalys and hydrazine hydrate. Aromatic polyamides and copolyamides having an inherent viscosity in the range of 0,76-1,16 dL/g were prepared by the direct polycondensation of the diamine with various aromatic dicarboxylic acids or with mixed dicarboxylic acids in 1-methyl-2-pyrrolidone (NMP) using triphenyl phosphite and pyridine as condensing agents. Most of the polymers were soluble in aprotic solvents such as NMP and N,N-dimethylacetamide (DMAc), and afforded transparent, flexible and tough films upon casting from DMAc solutions. Glass transition temperatures of the polymers were in the range of 246-327°C, and 10% weight loss temperatures were above 501°C in nitrogen and 476°C in air, respectively.
    Zusätzliches Material: 6 Tab.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/macp.1992.021930916
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  • 6
    Digitale Medien
    Digitale Medien
    Effects of brominated flame retardants and crosslinking agents on the flame retardancy of rubbers (1988)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 36 (1988), S. 963-978 
    Details
    ISSN: 0021-8995
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Maschinenbau , Physik
    Notizen: Tetrabromo-p-cresol (TBPC), pentabromophenol (PBP), and their allyl ether derivatives - tetrabromo-p-cresol allyl ether (TBPC-AE) and pentabromophenol allyl ether (PBP-AE) - were used in the study of flame retardancy of ethylene-vinyl acetate (EVA) copolymer and styrene-butadiene rubber (SBR), which were cured by dicumyl peroxide (DCP) and sulfur, respectively. The dependence of the flammability of crosslinking polymers on the polymer matrix, its additives, and the degree of crosslinking was investigated. The empirical equations of flame retardancy were established for these rubbers and compared with the measured values. It was found that the oxygen index of SBR-S system was in accordance with the empirical equations, while the EVA-DCP system, affected by the decomposed residue of DCP, showed a slight deviation. The brominated phenolic compounds of allyl ether (BPs-AE) showed a greater deviation than their precursors. This may be due to the fact that allyl group could react with DCP and lose its excellent flame resistance characteristic, which may be caused by the modified Claisen rearrangement produced in the thermal processing or burning. The phenolic brominated compounds containing the allyl group and a higher bromine content showed better flammability.
    Zusätzliches Material: 17 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/app.1988.070360418
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  • 7
    Digitale Medien
    Digitale Medien
    Synthesis and properties of novel aromatic polyamides derived from 1,5-bis(4-aminophenoxy)naphthalene and aromatic dicarboxylic acids (1993)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 31 (1993), S. 1571-1578 
    Details
    ISSN: 0887-624X
    Schlagwort(e): 1,5-bis(4-aminophenoxy)naphthalene ; direct polycondensation ; polyamides ; Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: A new bis(phenoxy)naphthalene-containing diamine, 1,5-bis(4-aminophenoxy)naphthalene, was synthesized in two steps from the condensation of 1,5-dihydroxy-naphthalene with p-chloronitrobenzene in the presence of potassium carbonate, giving 1,5-bis(4-nitrophenoxy)naphthalene, followed by hydrazine hydrate/Pd—C reduction. A series of polyamides and copolyamides were synthesized by the direct polycondensation of the diamine with various aromatic dicarboxylic acids or with mixed dicarboxylic acids in N-methyl-2-pyrrolidone (NMP) using triphenyl phosphite and pyridine as condensing agents. The polymers having inherent viscosity of 0.81-1.25 dL/g were obtained in quantitative yield. Most of the polymers were generally soluble in aprotic solvent such as N,N-dimethylacetamide, N-methyl-2-pyrrolidone, etc. The polymers derived from rigid dicarboxylic acids such as terephthalic acid, naphthalene dicarboxylic acid, and 4,4′-biphenyldicarboxylic acid exhibited crystalline patterns. Glass transition temperatures of polymers were in the range of 230-360°C, and 10% weight loss temperatures in nitrogen and air were above 492 and 470°C, respectively. © 1993 John Wiley & Sons, Inc.
    Zusätzliches Material: 2 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/pola.1993.080310627
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  • 8
    Digitale Medien
    Digitale Medien
    Synthesis and properties of new polyimides derived from 1,5-bis(4-aminophenoxy)naphthalene and aromatic tetracarboxylic dianhydrides (1993)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 31 (1993), S. 2799-2807 
    Details
    ISSN: 0887-624X
    Schlagwort(e): 1,5-bis(4-aminophenoxy)naphthalene ; poly(amic acid) ; properties of polyimide ; Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: Novel aromatic polyimides containing bis(phenoxy)naphthalene units were synthesized from 1,5-bis(4-aminophenoxy)naphthalene (APN) and various aromatic tetracarboxylic dianhydrides by the usual two-step procedure that included ring-opening polyaddition in a polar solvent such as N,N-dimethylacetamide (DMAc) to give poly(amic acid)s, followed by cyclodehydration to polyimides. The poly(amic acid)s had inherent viscosities between 0.72 and 1.94 dL/g, depending on the tetracarboxylic dianhydrides used. Excepting the polyimide IVb obtained from 3,3′,4,4′-biphenyltetracarboxylic dianhydride (BPDA), all other polyimides formed brown, flexible, and tough films by casting from the poly(amic acid) solutions. The polyimide synthesized from BPDA was characterized as semicrystalline, whereas the other polyimides showed amorphous patterns as shown by the x-ray diffraction studies. Tensile strength, initial moduli, and elongation at break of the APN-based polyimide films ranged from 105-135 MPa, 1.92-2.50 GPa, and 6-7%, respectively. These polyimides had glass transition temperatures between 228 and 317°C. Thermal analyses indicated that these polymers were fairly stable, and the 10% weight loss temperatures by TGA were recorded in the range of 543-574°C in nitrogen and 540-566°C in air atmosphere, respectively. © 1993 John Wiley & Sons, Inc.
    Zusätzliches Material: 6 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/pola.1993.080311117
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  • 9
    Digitale Medien
    Digitale Medien
    New poly(amide-imide)s syntheses. VII. Preparation and properties of poly(amide-imide)s derived from 1,5-bis(4-aminophenoxy) naphthalene, trimellitic anhydride, and various aromatic diamines (1993)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 31 (1993), S. 3081-3091 
    Details
    ISSN: 0887-624X
    Schlagwort(e): poly(amide-imide)s ; direct polycondensation ; 1,5-bis(4-aminophenoxy) naphthalene ; 1,5-bis(4-trimellitimidophenoxy) naphthalene ; Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: New bis(phenoxy)naphthalene-containing poly(amide-imide)s having an inherent viscosity in the range of 0.62-1.09 dL/g were prepared by the direct polycondensation of 1,5-bis(4-trimellitimidophenoxy) naphthalene (I) and various aromatic diamines using triphenyl phosphite and pyridine as condensing agents in N-methyl-2-pyrrolidone (NMP) in the presence of calcium chloride. The diimide-diacid (I) was prepared by the condensation of 1,5-bis(4-aminophenoxy) naphthalene and trimellitic anhydride. Most of the polymers were soluble in aprotic solvents such as NMP and N,N-dimethylacetamide (DMAc), and afforded transparent, flexible and tough films upon casting from DMAc solutions. Measurements of wide-angle X-ray diffraction revealed that those polymers containing p-phenylene or oxyphenylene groups were characterized as crystalline polymers. Tensile strength and initial moduli of the polymer films ranged from 61-86 MPa and 1.83-2.21 GPa, respectively. Glass transition temperatures of the polymers were in the range of 231-340°C. The melting points of the crystalline polymers ranged from 375-430°C. The 10% weight loss temperatures were above 512°C in nitrogen and 481°C in air. © 1993 John Wiley & Sons, Inc.
    Zusätzliches Material: 3 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/pola.1993.080311224
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  • 10
    Digitale Medien
    Digitale Medien
    New poly(amide-imide)s syntheses. VIII. Preparation and properties of poly (amide-imide)s derived from 2,3-bis(4-aminophenoxy)naphthalene, trimellitic anhydride, and various aromatic diamines (1994)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 32 (1994), S. 435-444 
    Details
    ISSN: 0887-624X
    Schlagwort(e): poly(amide-imide)s ; direct polycondensation ; 2,3-bis (4-aminophenoxy) naphthalene ; 2,3-bis (4-trimellitimidophenoxy) naphthalene ; Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: The new polymer-forming diimide-diacid, 2,3-bis(4-trimellitimidophenoxy) naphthalene (I), was readily obtained by the condensation reaction of 2,3-bis (4-aminophenoxy) naphthalene with trimellitic anhydride. A series of novel aromatic poly (amide-imide)s were prepared by the direct polycondensation of diimide-diacid I with various aromatic diamines using triphenyl phosphite in N-methyl-2-pyrrolidone (NMP)/pyridine solution containing dissolved calcium chloride. The resultant polymers have inherent viscosities in the range of 0.65-1.02 dL/g at 30°C in N, N-dimethylacetamide. These polymers were readily soluble in various organic solvents and could be cast into transparent, tough, and flexible films. Their casting films showed tensile strength at break up to 86 MPa, elongation to break of 5-9%, and initial moduli up to 2.35 GPa. The wide-angle X-ray diffraction revealed that those polymers containing p-phenylene or p-oxyphenylene group are partially crystalline, and the other polymers are evidenced as amorphous patterns. These polymers show a glass transition in the range of 213-290°C in their differential scanning calorimetry (DSC) traces. The thermal stability of the polymers was evaluated by thermogravimetry analysis, which showed the 10% weight-loss temperatures in the range of 508-565°C in nitrogen and 480-529°C in air atmosphere. © 1994 John Wiley & Sons, Inc.
    Zusätzliches Material: 3 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/pola.1994.080320304
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