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  • 1
    Electronic Resource
    Electronic Resource
    Synthesis of a poly(terephthaloylphosphine) (1992)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 199 (1992), S. 1-6 
    Details
    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: Poly(phenylphosphindiylterephthaloyl), ein neues phosphorhaltiges Polymeres, wurde durch Lösungspolykondensation von Dilithium(phenyl)phosphin mit Terephthaloylchlorid bei niedriger Temperatur hergestellt. Es ist in polaren aprotischen Lösungsmitteln löslich; die inhärente Viskosität in DMF bei 30°C beträgt 19 ml/g. Das Polymere wurde mittels Elementaranalyse sowie IR- und 1H-NMR-Spektroskopie charakterisiert. TGA-Messungen ergeben, daß das Polymere in Luft bis 250°C stabil ist; es ist selbstverlöschend.
    Notes: Poly(phenylphosphinediylterephthaloyl), a novel phosphorus-containing polymer, was synthesized by low-temperature solution polycondensation of dilithio(phenyl)-phosphine with terephthaloyl chloride. The resulting polymer is soluble in polar aprotic solvents, having inherent viscosity of 19 ml/g in DMF at 30°C. The polymer was characterized by elemental analysis, IR and 1H-NMR spectroscopy. TGA data show that the polymer is stable up to 250°C in air. The polymer was found to be self-extinguishing.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1992.051990101
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  • 2
    Electronic Resource
    Electronic Resource
    Synthesis and characterization of a new bismaleimide resin matrix for composites (1991)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 189 (1991), S. 51-61 
    Details
    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: Durch Kondensation von 3-Nitrophthalsäureanhydrid mit 4,4′-Diaminodiphenylether und anschließende Reaktion mit Bisphenol-A wurde ein Diamin erhalten, das mit Maleinsäure zu einem Ethergruppen enthaltenden Bismaleimid-Monomeren umgesetzt wurde; dieses wurde mittels Elementaranalyse, IR-und NMR-Spektroskopie charakterisiert. Es ist in niedrigsiedenden Lösemitteln sehr gut löslich und vernetzt bei Temperaturen oberhalb 200°C. Das ausgehärtete Produkt ist in allen Lösemitteln unlöslich, einschließlich konz. H2SO4. Das thermische Verhalten des Bismaleimids wurde durch TGA, DTA und isotherme Alterung untersucht; das Polymere ist stabil bis 300°C.
    Notes: A bismaleimide monomer containing etherimide linkages was synthesized from 3-nitrophthalic anhydride, diamino diphenyl ether and bisphenol-A by the principle of activated nucleophilic displacement reaction and finally reacting the produced diamine with maleic anhydride. The monomer was characterized by elemental analysis, IR and NMR spectroscopy. It is highly soluble in low boiling solvents such as chloroform, tetrahydrofuran, etc. It forms a cross-linked polymer on heating to 200°C and higher. The cured product is completely insoluble in usual solvents including conc. H2SO4. The thermal behaviour of the bismaleimide was studied by TGA, DTA and isothermal aging. The polymer is stable up to 300°C. Laminates prepared with this resin and carbon fiber are almost void-free and possess good mechanical and thermal properties. These properties are compared with earlier reported bismaleimide imide prepolymer based composite.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1991.051890105
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  • 3
    Electronic Resource
    Electronic Resource
    Thermal properties of nickel powder filled polypropylene composites (1990)
    Brookfield, Conn. : Wiley-Blackwell
    Polymer Composites 11 (1990), S. 223-228 
    Details
    ISSN: 0272-8397
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The thermal properties of nickel powder filled polypropylene composites were measured over a range of filler concentrations. The thermal conductivities increased with filler concentration. Data were compared with predictions by theoretical models for two phase systems. The equation of Cheng-Vachon gave reasonable agreement with measurements. A TGA (thermogravimetric) study of the composites showed that the presence of nickel powder increases the thermal stability of polymer through an increase in activation energy to a maximum at a critical filler concentration, beyond which the stability decreased. The Vicat softening point of the composites was also increased in the presence of Ni powder.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pc.750110405
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  • 4
    Electronic Resource
    Electronic Resource
    Melt rheological properties of nickel powder filled polypropylene composites (1988)
    Brookfield, Conn. : Wiley-Blackwell
    Polymer Composites 9 (1988), S. 291-296 
    Details
    ISSN: 0272-8397
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The melt rheological properties of nickel powder filled polypropylene composites were investigated. The effect of filler concentration on shear stress-shear rate data, melt viscosity and melt elasticity parameters were determined by using a capillary rheometer. The study shows that the materials follow a power law in viscous behavior over the entire range of shear rates investigated and that the viscosity increases and elasticity decreases as filler concentration is increased up to a critical value. However, beyond the critical filler content melt viscosity decreases while melt elasticity increases. The effect of temperature on the viscoelastic properties of filled polypropylene was also investigated.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pc.750090408
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  • 5
    Electronic Resource
    Electronic Resource
    Tribological properties of polyesterimide and its composites (1982)
    Brookfield, Conn. : Wiley-Blackwell
    Polymer Composites 3 (1982), S. 170-173 
    Details
    ISSN: 0272-8397
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Polyesterimide (PEI) and phenol formaldehyde (PF) samples were synthesized, and composites of the two polymers, as well as composites with carbon, were prepared. Using a pinon-disc machine, the friction and wear properties of the following samples were studied in the load range of two to eight bars:Phenolformaldehyde vs. steelPhenol formaldehyde cured with hexamethylenetetramine vs. steelPolyesterimide vs steelPolyesterimide and carbon composite vs steelPhenol formaldehyde vs polyesterimidePhenol formaldehyde and polyesterimide composite vs. phenol formaldehydePhenol formaldehyde and polyesterimide composite vs. steel. The data obtained from these experiments were compared with literature data on poly(tetrafluoroethylene) and nylon, conventionally used for tribological applications. It is seen that, in terms of thermal stability, friction, and wear, PEI and PF are promising for tribological applications.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pc.750030311
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  • 6
    Electronic Resource
    Electronic Resource
    Influence of fiber length, fiber orientation, and interfacial adhesion on poly (butylene terephthalate)/polyethylene alloys reinforced with short glass fibers (1994)
    Brookfield, Conn. : Wiley-Blackwell
    Polymer Composites 15 (1994), S. 349-358 
    Details
    ISSN: 0272-8397
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Blends of poly(butylene terephthalate) and high density polyethylene at a ratio of 80:20 wt% were reinforced with short glass fibers varying from 10 to 30 wt% to enhance mechanical properties. Considerable fiber damage occurred during injection molding, reducing the number average fiber length from the starting value of 4.5 mm to 〈 1 mm. This value decreased with increasing fiber content, which is also responsible for lowering the reinforcement efficiency. The variation in mechanical properties has been explained on the basis of fiber concertration. The effect of an ionomer, which was used to compatibilize the blends, on properties of corresponding composites has also been studied.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pc.750150505
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  • 7
    Electronic Resource
    Electronic Resource
    Mechanical properties of nickel-powder-filled polypropylene composites (1992)
    Brookfield, Conn. : Wiley-Blackwell
    Polymer Composites 13 (1992), S. 47-52 
    Details
    ISSN: 0272-8397
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Mechanical properties such as tensile and flexural properties as well as impact behavior of nickel-powder-filled isotactic polypropylene composites were investigated in the composite composition range 0-3.5 volume % Ni. Tensile modulus, strength, and elongation-at-break decreased with increase in Ni content, which is attributed to the introduction of discontinuity in the structure. Analysis of tensile strength data indicated the introduction of stress concentration consequent upon addition of Ni into polypropylene. Izod impact strength at first increased up to a critical Ni content beyond which the value decreased inappreciably while flexural modulus and strength increased with filler concentration.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pc.750130107
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  • 8
    Electronic Resource
    Electronic Resource
    Mechanical properties of i-PP/CaCO3 composites (1991)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 42 (1991), S. 3101-3110 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Tensile and impact behavior of CaCO3-filled polypropylene was studied in the composition range 0-60 wt % filler. Tensile modulus increased while tensile strength and breaking elongation decreased with increase in CaCO3 content. The modulus increase and elongation decrease were attributed to increased filler-polymer interaction resulting in reduction in molecular mobility, while increased amorphization and obstruction to stress transfer accounted for the tensile strength decrease. Analysis of tensile strength data showed introduction of stress concentration in the composites. Izod impact strength at first increased up to a critical CaCO3 content, beyond which the value decreased. Surface treatment of CaCO3 with a titanate coupling agent LICA 12 enhances the adhesion of the filler and polymer, which further modifies the strength properties. Scanning electron microscopic studies indicated better dispersion of CaCO3 particles upon surface treatment, which effected the changes in the strength properties of the composites.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1991.070421204
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  • 9
    Electronic Resource
    Electronic Resource
    Influence of wood flour on the mechanical properties of polyethylene (1986)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 32 (1986), S. 4285-4289 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1986.070320341
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  • 10
    Electronic Resource
    Electronic Resource
    Crystallization of PP in PP/Ni composites and its correlation with tensile properties (1989)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 37 (1989), S. 1889-1899 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: The effect of nickel (Ni) powder on crystallization of polypropylene (PP) in PP/Ni composites is studied through differential scanning calorimetry (DSC) and wide-angle X-ray diffraction techniques. Interpretation of crystallization exotherm peaks in terms of nucleation and growth rates of crystallization, crystallite size distribution, and crystallinity indicated differences in the morphology of PP in all the composites. Crystallinity and tensile behavior decreased on nickel addition. There is a good qualitative agreement in the crystallinity determined by X-ray diffraction and DSC exotherms, and the variation in both cases, with the volume percent of filler is similar. An attempt has been made to correlate the various tensile properties with the crystallization parameters such as the crystallinity and crystallite size distribution.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1989.070370712
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