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  • 1
    Electronic Resource
    Electronic Resource
    Influence of the level of interchange reactions on the mechanical behaviour of polycarbonate/phenoxy blends (1987)
    Springer
    Journal of materials science 6 (1987), S. 698-700 
    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/BF01770930
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  • 2
    Electronic Resource
    Electronic Resource
    Influence of interchange reactions on the nature and properties of miscible 50/50 poly(butylene terephthalate)/phenoxy blends (1990)
    Springer
    Journal of materials science 25 (1990), S. 1522-1528 
    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 The combined influence of miscibility and interchange reactions on the thermal and mechanical properties of 50/50 blends of poly(butylene terephthalate) (PBT) and phenoxy, and the nature of the reactions, have been studied. It has been proved by means of Fourier transform infrared spectroscopy and solubility tests that the reaction occurs through the hydroxyl of the phenoxy. Evidence is presented for the additivity of the beneficial effects of miscibility and interchange reactions on the mechanical properties of the quenched, not-fully-crystalline material.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01045345
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  • 3
    Electronic Resource
    Electronic Resource
    The effects of solvent sorption on the properties of poly(ether ether ketone) (1993)
    Springer
    Journal of materials science 28 (1993), S. 3272-3276 
    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 A study has been carried out on the sorption of ortho-dichlorobenzene, N,N-dimethylformamide and water by poly(ether ether ketone) (PEEK). Two types of PEEK samples have been analysed; the first in the amorphous state and the second with a high crystallinity level. The sorption and desorption curves have been determined and the effect of the solvent presence on the mechanical properties has been analysed by means of the tensile test. PEEK is affected to a different extent by the solvents studied and also by the crystallinity of the polymer. Sorption takes place only in the case of amorphous PEEK. Its effect on the mechanical properties of PEEK is explained on the basis of the two concomitant processes that are the consequence of sorption, these are: plasticization and induced crystallization.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00354246
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  • 4
    Electronic Resource
    Electronic Resource
    Phase behaviour and mechanical properties of poly(ether ether ketone)-poly(ether sulphone) blends (1991)
    Springer
    Journal of materials science 26 (1991), S. 5939-5944 
    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 The phase behaviour and the mechanical properties of binary blends composed of poly(ether ether ketone) and poly(ether sulphone) have been studied both in the amorphous state and after crystallization of poly(ether ether ketone). Differential scanning calorimetry and dynamical mechanical analysis clearly show the existence of phase separation in the blends. Density measurements confirm the absence of strong interactions between the blend components, as well as the slight effect of PES on the crystallization of PEEK. The mechanical properties of the quenched, amorphous blends remain surprisingly good in spite of the observed immiscibility, however, slowly cooled, crystalline blends appear as brittle materials.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01130138
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  • 5
    Electronic Resource
    Electronic Resource
    Structure and properties of injection molded blends of poly(ether imide) and a thermotropic copolyester (2000)
    Springer
    Journal of materials science 35 (2000), S. 153-158 
    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 The phase structure and mechanical properties of blends composed of poly(ether imide) and a thermotropic liquid-crystalline copolyester, Rodrun LC-5000, processed by injection molding were studied in the PEI-rich region. The addition of Rodrun to PEI produces fully immiscible blends and strongly improves the processability of PEI. Injection molding gave rise in very poor LCP blends to fine dispersed phases; in the rest of compositions it gave rise to coarse structures. This was probably due to the very large viscosity difference between the components of the blends. An increase in the melt temperature led to a smaller viscosity difference and as a consequence dispersed phase dispersion improved. The Young's modulus clearly increased with the Rodrun content. The tensile strength was maintained up to a LCP content of 5% but decreased at higher contents because of the coarse morphologies obtained. The overall mechanical behavior was a main consequence of the lack of fibrillation and of the LCP dispersion level in the matrix.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1004765204827
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  • 6
    Electronic Resource
    Electronic Resource
    Acrylonitrile–butadiene–styrene-toughened polysulphone of bisphenol A blends: influence of processing temperature and composition (1997)
    Springer
    Journal of materials science 32 (1997), S. 971-977 
    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 Polysulphone of bisphenol A (PSU)/acrylonitrile–butadiene–styrene (ABS) blends have been obtained by direct injection moulding at different temperatures and for compositions in the PSU-rich range. Direct injection moulding provided a mixing level similar to that of kneading. The blends were almost fully immiscible with the exception of the polybutadiene (PBD) phase where some PSU appeared to be present. Only a very small amount of ABS was required to greatly improve the tracking index of PSU. The mechanical properties, however, were those of a compatible material, and did not depend on the injection temperature. Moreover, with the exception of the ductility, they were in fairly good proportion to the blend composition, and provided the most balanced set of properties at an ABS content near 5%.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1018566019772
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  • 7
    Electronic Resource
    Electronic Resource
    Influence of migration of plasticizer during melt mixing on the transitions and properties of PC/CAB blends (1990)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part B: Polymer Physics 28 (1990), S. 1015-1031 
    Details
    ISSN: 0887-6266
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Static and dynamic mechanical properties, morphology, and thermal behavior of polycarbonate (PC)/plasticized cellulose acetobutyrate (CAB) blends were investigated to determine whether the plasticizer of the CAB modifies the miscibility of the blend and the mechanical properties of this essentially incompatible blend. In spite of the lack of transparency of the blends, both dynamic mechanical and thermal analysis results show the presence, at all blend compositions studied, of a single glass transition temperature which varies with the composition of the blend. Considering the ternary nature of the blends, we propose that plasticizer migration and the difficulty of discerning the presence of one or two peaks in a narrow temperature range may account for the observed behavior. Scanning electron microscopy confirms the immiscibility of the blends. The blends show large positive deviations of the tensile moduli from linearity and very low ductility. The reported tensile strength data are discussed in terms of several different equations for composites. This mechanical behavior is explained as a consequence of the migration of the plasticizer and of its subsequent antiplasticizing effect on the properties of the blend.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/polb.1990.090280703
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  • 8
    Electronic Resource
    Electronic Resource
    Development of interchange reactions in ternary PBT-PC/phenoxy blends (1991)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 42 (1991), S. 1639-1645 
    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: Ternary PBT-PC/phenoxy blends were melt mixed for periods of time up to 110 min to determine the development of interchange reactions among the blend components. This development was evaluated by means of solvent extraction and DSC measurements on blends obtained after characteristic blending times shown in the torque vs. blending time curve. PBT reacts, after very short blending times and, probably due to residual catalyst, mainly with phenoxy. Although at high phenoxy contents a single torque peak is observed, at low phenoxy contents two peaks are observed that correspond to the two stages in which the reaction takes place: at the beginning in the phenoxy-rich phase and later in the overall blend.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1991.070420618
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  • 9
    Electronic Resource
    Electronic Resource
    Effects of injection temperature on the mixing level and properties of injection-mixed PMMA-phenoxy blends (1992)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 45 (1992), S. 339-348 
    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: Polymethyl methacrylate-phenoxy blends have been obtained in an injection machine at different injection temperatures in order to determine the possibility of direct blending in these processing machines and also the effect that different blending levels have in the mechanical properties of these miscible blends. High injection temperatures, but in the range used in production of the components, provided fairly well homogenized blends comparable both in transparency and mechanical properties to those obtained by kneading and subsequent compression molding. Very good mechanical properties, although less transparent, were obtained when processing at low injection temperatures.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1992.070450216
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  • 10
    Electronic Resource
    Electronic Resource
    Phase behavior of ternary PBT-PC/phenoxy blends (1991)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 42 (1991), S. 1475-1483 
    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: Ternary polymer blends were obtained by melt mixing, mixing up to 30% poly(butylene terephthalate) (PBT) with polycarbonate (PC) and phenoxy in an attempt to improve the miscibility of the PC/phenoxy binary blend. Although most of the blends with a PBT content higher than 10% appear as transparent, two Tg's appeared at all the blend compositions. These Tg's correspond to PC-rich and phenoxy-rich phases where a low amount of the main component of the other phase and all PBT are dissolved in amounts that are a function of the PC/phenoxy ratio of the blend. Increasing the PBT contents in the blends closes to linearity the torque versus composition plot, so that a relationship between miscibility level and viscosity exists in these blends.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1991.070420533
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