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  • 11
    Electronic Resource
    Electronic Resource
    Thermodynamics of the mixture poly(ethylene oxide)/ toluene (1981)
    Springer
    Polymer bulletin 4 (1981), S. 25-32 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary Excess volumes at 60°C for concentrated mixtures of poly (ethylene oxide) and toluene have been determined.The volume change of mixing is negative, amounting to −0.59% of the total volume at the segment fraction φ2 = 0.5. This result has been used in adjusting the energy parameter X12 = 1.8 cal cm−3, from which theoretical values of the residual chemical potential parameter X, partial molar enthalpies and entropies at different concentrations can be evaluated through the Flory-Prigogine-Patterson theory. Solvent activities for moderately concentrated solutions have been measured by vapour pressure osmometry at 42°and 70°C. Inverse gas chromatography was also used in order to obtain the X value at φ2 = 1. The reduced partial molar excess enthalpy K was calculated from the experimental viscosity-temperature coefficient. Experimental and theoretical values have been compared.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01045236
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  • 12
    Electronic Resource
    Electronic Resource
    Chromatographic determination of polymer solubility parameters (1985)
    Springer
    Polymer bulletin 13 (1985), S. 463-467 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary Weight fraction activity coefficients (Ω1)∞ and interaction parameters x have been determined for seven different solvents in Polyarylate at three temperatures by the gas chromatographic method (inverse gas chromatography). Data have been used to calculate infinite dilution solubility parameters according to the method proposed by DiPaola-Baranyi and Guillet. The validity of the plots involved in the above mentioned method is also discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01033346
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  • 13
    Electronic Resource
    Electronic Resource
    Thermal decomposition of miscible phenoxy/poly(ethylene oxide) blends (1989)
    Springer
    Journal of materials science 24 (1989), S. 1021-1024 
    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 thermal decomposition of miscible blends composed by the poly(hydroxy ether of bis-phenol A) (phenoxy) and poly(ethylene oxide) (PEO) has been investigated by dynamic thermogravimetric analysis. The results obtained indicate that the blend composition affects the thermal decomposition processes. In general it can be seen that phenoxy causes a negative effect on the thermal stability of the blends.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01148793
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  • 14
    Electronic Resource
    Electronic Resource
    Glass transition temperatures of plasticized polyarylate (1987)
    Springer
    Polymer bulletin 18 (1987), S. 149-154 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary Glass transition temperatures of different Polyarylate/plasticizer systems with plasticizer concentrations limited to 30 wt.% have been determined by Differential Scanning Calorimetry. Experimental results have been compared to the predictions of three different expressions: the logarithmic rule of mixtures, the Fox equation and the Couchman-Karasz equation. The degree of homogeneity of the different systems has been related to the width of the simple Tg. The data for the different PAr/plasticizer mixtures seem to fit the Fox equation more closely than the other equations tested.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00261893
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  • 15
    Electronic Resource
    Electronic Resource
    Polyarylate/polyamide 6 blends: A calorimetric study (1990)
    Springer
    Polymer bulletin 24 (1990), S. 641-647 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary A calorimetric study has been done of the miscibility of blends composed of polyarylate (PAr) and poly(ε-caprolactam) (polyamide 6, nylon 6). The thermal transitions of blends subjected to two different thermal treatments have been determined. Two glass transitions have been observed in the blends irrespective of the thermal history. These glass transitions indicate the existence of two amorphous phases in the blends, a practically pure nylon phase and a mixed PAr/nylon 6 phase. The variation of the melting temperature of nylon with the blend composition is in good agreement with the existence of phase separation in the blends. However, the melting heat shows a slightly positive deviation from linearity when it is represented against the blend composition.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00300161
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  • 16
    Electronic Resource
    Electronic Resource
    Crystallization and melting behaviour of poly(butylene terephthalate) in poly(butylene terephthalate)/polyarylate blends (1992)
    Springer
    Polymer bulletin 29 (1992), S. 415-422 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary The crystallization and melting behaviour of poly(butylene terephthalate) has been studied in the pure state and in its blends with a polyarylate of bisphenol A and isophthalic/terephthalic acids. Differential scanning calorimetry has been used as experimental technique and the effects of different thermal treatments have been analyzed. Results show the hindrance for the crystallization of poly(butylene terephthalate) imposed by the presence of polyarylate, as well as the existence of multiple melting after isothermal crystallization. Explanations are given for the observed behaviours.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00944839
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  • 17
    Electronic Resource
    Electronic Resource
    Determination of poly(ethylene oxide) crystallinity by inverse gas chromatography (1983)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 184 (1983), S. 605-611 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Specific retention volumes Vg for acetone, 1-propanol, ethyl acetate, hexane, and tetrahydrofuran were obtained by inverse gas chromatography using poly(ethylene oxide) as stationary phase. Measurements were done at different flow rates, different injected sample amounts, and with three columns of different packing. Retention volumes were measured above and below the melting temperature of the polymer. The shape of the flow diagram and the variation of retention time tr with the sample amount depend on the temperature, flow rate, and the nature of the probe. Moreover, and due to the polymer polarity, the retention volume is a linear function of the column coating. All these factors must be controlled in order to obtain an accurate value of Vg which allows the determination of the crystallinity of the stationary phase. Above Tm, Vg is independent of flow, packing, and amount of the injected sample.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1983.021840315
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  • 18
    Electronic Resource
    Electronic Resource
    An extension of the Painter-Coleman miscibility guide to ternary polymer blends (1994)
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 34 (1994), S. 1314-1318 
    Details
    ISSN: 0032-3888
    Keywords: Chemistry ; Chemical Engineering
    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 idea of separating the free energy of mixing into two contributions (corresponding to the “physical” or “nonspecific” and to the “specific” interactions, respectively) proposed by Painter and Coleman has been extended to ternary polymer/polymer/polymer blends. In this paper experimental phase diagrams of three ternary blends have been reproduced by estimating both contributions for the interaction energy density (Bij) which characterizes each polymer pair. In contrast to the Painter-Coleman Miscibility Guide rules, we have found that, in some cases, “specific” contributions positive and unfavorable to the mixing, due to the self-association of one of the components, can describe more adequately the experimental trends.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pen.760341703
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  • 19
    Electronic Resource
    Electronic Resource
    Glass transition temperatures in blends of polyarylate and a styrene/acrylonitrile copolymer (1989)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part B: Polymer Physics 27 (1989), S. 1951-1953 
    Details
    ISSN: 0887-6266
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/polb.1989.090270912
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  • 20
    Electronic Resource
    Electronic Resource
    Gas chromatographic determination of the interaction parameter of poly(ethylene oxide)/poly(methyl methacrylate) blends (1984)
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 24 (1984), S. 287-290 
    Details
    ISSN: 0032-3888
    Keywords: Chemistry ; Chemical Engineering
    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: Inverse gas chromatography (IGC) has been used to investigate thermodynamic miscibility of a molten poly(ethylene oxide) (PEO)/poly(methyl methacrylate) (PMMA) blend. Toluene, benzene, and chloroform have been employed as probes in pure and mixed stationary phases of these polymers. Experimental measurements have been taken over a narrow range of temperatures because of the high PMMA glass transition temperature as well as the degradation of the PEO. The interaction parameter χ23 determined at 150°C is slightly negative and dependent on the interacting probe, as has been also noted in previous chromatographic studies on polymer-polymer miscibility. The last section is devoted to a model calculation, using Flory's equation of state theory. Different χ23-concentration curves have been simulated, with the interaction energy parameter X23 as an adjustable parameter.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pen.760240410
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