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  • 1990-1994  (9)
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  • 1
    Electronic Resource
    Electronic Resource
    Modification of nylon-6 with semi-rigid and wholly-rigid aromatic polyamides (1994)
    Springer
    Journal of materials science 29 (1994), S. 2040-2052 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Nylon-6 was reinforced by two semi-rigid aromatic polyamides, poly(p-diphenylmethyl terephthalamide) (PMA), and poly(p-diphenyloxide terephthalamide) (POA), and also one wholly-rigid aromatic polyamide, poly(m-phenylene isophthalamide) (PmlA) by physical blending and chemical copolymerization usingp-amino phenyl acetic acid (P-APA) as a coupling agent. From the results of differential scanning-calorimetry, it was shown that both the polyblends with semi-rigid and wholly-rigid polyamides exhibited a glass transition temperature,Tg, higher than that of nylon-6 homopolymer. It also showed that theT gs of wholly-rigid polyblends were higher than those of semi-rigid polyblends. Nevertheless, the multiblock copolyamides appeared to have even higherT g andT m, and better thermal stability. Morphological observations revealed that all the polymer alloys (polyblends and copolymers) were a dispersed phase structure, although the multiblock copolyamides were more homogeneous and compatible. Based on wide-angle X-ray diffraction, it was found that the polyblends had two diffraction peaks, i.e. 2θ = 20.5 ° and 24 °. However, the multiblock copolyamides had only one peak at 2θ = 20 °, evidently indicating a new crystal structure of the multiblock copolyamides formed. For the mechanical properties, it was found that the multiblock copolyamides had a more significant reinforcing effect than those of polyblends, especially those copolymerizing with wholly aromatic polyamides.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01154678
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  • 2
    Electronic Resource
    Electronic Resource
    Thermal and dynamic mechanical properties of polyurethane modified with poly(m-phenylene isophthalamide) (1993)
    Springer
    Journal of materials science 12 (1993), S. 1781-1785 
    Details
    ISSN: 1573-4811
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00517609
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  • 3
    Electronic Resource
    Electronic Resource
    Modification of nylon-6 with poly (m-phenylene isophthalamide) via MDI as a chain extender (1993)
    Springer
    Journal of materials science 28 (1993), S. 4862-4867 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Reinforcement of flexible nylon-6 by using poly (m-phenylene isophthalamide) PmIA (Nomex) using (MDI) 4,4′-diphenylene methane diisocyanate as a chain extender was studied. Observation by scanning electron microscopy showed that the multiblock copolymer had a homogeneous texture. From the differential scanning calorimetry measurements, the multiblock copolymers were shown to have only one melting point, T m, which is higher than that of nylon-6. The wide-angle X-ray diffraction pattern shows that nylon-6 has two diffraction peaks at 2θ=20° and 23.8°. However, the multiblock copolymer has only one peak at 2θ=20°, indicating a different crystal structure of multiblock copolymers. The copolymers appear to have a significant reinforcing effect on the mechanical properties.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00361148
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  • 4
    Electronic Resource
    Electronic Resource
    The block copolymer of nylon-6 with semi-rigid poly(p-diphenylmethyl terephthalamide) (1994)
    Springer
    Journal of materials science 29 (1994), S. 1179-1184 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract In this study, the flexible nylon-6 was reinforced by the semi-rigid aromatic polyamide poly(p-diphenylmethyl terephthalamide) through chemical copolymerization using p-aminophenylacetic acid as a coupling agent. From differential scanning calorimetry it was discovered that theT g andT m of multiblock copolyamides were higher than those of triblock copolyamides. From observation by scanning electron microscopy the multiblock copolyamides exhibited a homogeneous texture rather than an aggregated one. We found that in wide-angle X-ray diffraction patterns the triblock copolyamides had two diffraction peaks, i.e. 2θ=20 and 24
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00975061
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  • 5
    Electronic Resource
    Electronic Resource
    Modification of nylon-6 with semirigid poly(p-diphenylmethyl terephthalamide) (1993)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 47 (1993), S. 1801-1812 
    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: In this research, flexible nylon-6 was reinforced by semirigid aromatic polyamide poly(p-diphenylmethyl terephthalamide) (PMA) through physical polyblending and chemical copolymerization using p-aminophenylacetic acid (P-APA) as a coupling agent. From the DSC measurement, it was shown that the Tg of the polyblends was increased with the increase of PMA content. It was discovered that the Tg and Tm of multiblock copolyamides would be higher than those of polyblends and triblock copolyamides. The multiblock copolyamides exhibited a homogeneous texture rather than an aggregated one. Scanning electron microscopy revealed that the polyblends were a dispersed-phase structure. We found that from the wide-angle X-ray diffraction pattern the triblock copolyamides and polyblends had two diffraction peaks, i.e., 2θ = 20° and 24°. However, the multiblock had only one at 2θ = 20°, which evidently indicates that a new crystal structure of multiblock copolyamides was formed. As for the mechanical properties, the multiblock copolyamides were found to have more significant reinforcing effects than those of polyblends and triblock copolyamides. © 1993 John Wiley & Sons, Inc.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1993.070471011
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  • 6
    Electronic Resource
    Electronic Resource
    Modification of nylon-6 with semi-rigid poly(p-diphenylmethyl terephthalamide) using MDI as a chain extender (1994)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 53 (1994), S. 51-58 
    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 purpose of this study is to reinforce the flexible nylon-6 by using Poly(p-diphenylmethyl terephthalamide) (PMA) using MDI as a chain extender. Observation by scanning election microscopy showed that the multiblock copolymer had a homogeneous texture. From the differential scanning calorimetry measurements, the multiblock copolymers were shown to have only one melting point, Tm, which is higher than that of nylon-6. The wide-angle X-ray diffraction pattern shows that nylon-6 has two diffraction peaks at 2θ = 20° and 23.8°. However, the multiblock copolymer has only one peak at 2θ = 20°, indicating a different crystal structure of multiblock copolymers. The copolymers appears to have a significant reinforcing effect on the mechanical properties. © 1994 John Wiley & Sons, Inc.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1994.070530106
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  • 7
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    Modification of nylon-6 with poly (m-phenylene isophthalamide) via MDI as a chain extender (1993)
    Springer
    Details
    Publication Date: 1993-09-01
    Print ISSN: 0022-2461
    Electronic ISSN: 1573-4803
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Published by Springer
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  • 8
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    The block copolymer of nylon-6 with semi-rigid poly(p-diphenylmethyl terephthalamide) (1994)
    Springer
    Details
    Publication Date: 1994-01-01
    Print ISSN: 0022-2461
    Electronic ISSN: 1573-4803
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Published by Springer
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  • 9
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    Modification of nylon-6 with semi-rigid and wholly-rigid aromatic polyamides (1994)
    Springer
    Details
    Publication Date: 1994-04-01
    Print ISSN: 0022-2461
    Electronic ISSN: 1573-4803
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Published by Springer
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