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  • 1
    Electronic Resource
    Electronic Resource
    Induzierte optische Aktivität in Copolymeren von (−)-Menthylacrylat mit Styrol (1978)
    Springer
    Colloid & polymer science 256 (1978), S. 618-618 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , 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/BF01639350
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Stabilization of high-impact polystyrene/ polyethylene blends (1992)
    Springer
    Journal of materials science 27 (1992), S. 499-503 
    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 Commercial poly(styrene-b-butadiene) copolymers (SBS) can act as effective compatibilizers in blends between high-impact polystyrene (HIPS) and polyethylene (PE), allowing a fine dispersion of PE in the polystyrene matrix, with a good balance of stiffness and impact strength. However, when processed under more severe conditions (e.g. in multiple extrusions, which simulate customer's product scrap recovery), the above blends show rather poor stability and their useful properties are rapidly lost. That undesirable effect is mainly due to cross-linking of SBS, which thus looses its compatibilizing activity. A correlation has been found between the time-to-cross-linking of SBS rubber in a Brabender mixer and the rapid decay of mechanical properties. The analysis of the mixing process and the morphology examinations of the final blend sample by TEM seem to support the above hypothesis. A significant reduction of block copolymer degradation has been achieved by means of a suitable stabilization.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00543943
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    A study on compatibilization of AES/PA6 blends (1993)
    Springer
    Journal of materials science 28 (1993), S. 4119-4128 
    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 Polyblends of Nylon 6 and AES were prepared and their mechanical properties and phase morphology examined. Two compatibilization techniques were evaluated: addition of a suitable block copolymer: poly(styrene-co-maleic anhydride) (SMA); AES functionalization with maleic anhydride (MA) through reactive extrusion. As a preliminary test for the compatibilizing efficiency, SMAs and PA6 were compounded in a Brabender mixer, recording the torque during the operations and evaluating, by solvent extraction, the amount of SMA grafted to PA6. However, when moving to the ternary blends AES/SMA/PA6, the highest value of notched lzod impact strength (290 J m−1 versus 20 J m−1) was found for an SMA sample containing 24% MA, which did not show the highest reactivity with PA6 in the preliminary test run. This finding suggests that not only the reactivity towards PA6, but also the miscibility with AES phase (the highest for the SMA product with 24% MA) must be taken into account when designing the best performing compatibilizer. On the other hand, AES functionalization with MA and DCP proved to be more successful and the resulting 50/50 blend with PA6 exhibited an outstanding value of notched Izod impact strength (1050 J m−1)
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00351242
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  • 4
    Electronic Resource
    Electronic Resource
    Compatibilizing PPE and PA6 with nitro-phthalimide derivatives (1996)
    Springer
    Journal of materials science 31 (1996), S. 95-101 
    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 Compatibilization of poly(2,6-dimethyl (PPE) with 1,4 phenylene-ether) PA6 has been achieved in two steps: first, (PPE) was functionalized with N-methyl-4-nitro-phthalimide; then, functionalized PPE was allowed to react, by melt blending, with the amine end group of PA6, giving a trans-imidation product. The reaction path was followed by torque measurements in a Brabender apparatus and the products characterized by infrared (i.r.) and nuclear magnetic resonance (NMR) spectroscopy. The above PPE/PA6 blends, modified with a suitable rubbery component (Kraton G), showed a remarkable Izod impact strength value, compared to the uncompatibilized mixture (170 versus 30 Jm−1). The maximum impact values were obtained with 1.65% functionalized PPE.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00355132
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    Paper (German National Licenses)
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