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  • Articles  (38)
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  • Articles  (38)
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  • Springer  (38)
  • American Meteorological Society
  • American Physical Society (APS)
  • Blackwell Publishing Ltd
  • De Gruyter
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  • 2000-2004
  • 1995-1999  (36)
  • 1980-1984  (2)
  • 1955-1959
  • 1935-1939
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  • 1
    Electronic Resource
    Electronic Resource
    CPS 758 Untersuchung des Mischungsgleichgewichts binärer Polymermischungen (1984)
    Springer
    Colloid & polymer science 262 (1984), S. 557-565 
    Details
    ISSN: 1435-1536
    Keywords: Polystyrene ; Tetramethyl-bisphenol A-polycarbonate ; blends ; phase diagramm ; DSC ; cloud point ; phase separation kinetics ; electron microscopy ; crystallization
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The phase diagram of a binary polymer blend can be derived from the glass temperaturesT g of the demixed phases under the following conditions: 1. The Tg's of the pure components are sufficiently different from one another. 2. TheT g 's of the one-phase homogeneous mixtures can be determined and vary monotonically with composition. 3. The equilibrium state of the mixture is attained after sufficient long annealing at temperatureT. 4. The equilibrium state at the temperatureT can be frozen by quenching. These conditions are examined for mixtures of polystyrene (PS) and tetra methyl-bis-phenol A-polycarbonate (TMPC). The phase separation kinetics is investigated with respect to size and composition of the co-existing phases. The co-existance curves (binodal with lower critical point) are determined for mixtures with various molar masses of the PS component. The problems concerning the cloud point curves are shortly discussed. BetweenT g and the binodal the one-phase mixtures exist in a hindered thermodynamic state, because the crystallization of the TMPC component is a very slow process which requires very long annealing. With increasing amounts of PS in the mixture the crystallization half time of TMPC is lowered.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01451519
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  • 2
    Electronic Resource
    Electronic Resource
    Isothermal crystallization and melting behavior of short carbon fiber reinforced poly(ether ether ketone) composites (1998)
    Springer
    Journal of polymer research 5 (1998), S. 221-226 
    Details
    ISSN: 1572-8935
    Keywords: PEEK ; Composites ; DSC ; Crystallinity ; Melting
    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: Abstract Films of short carbon fiber reinforced poly(ether ether ketone) (PEEK) composite were formed by compression molding pellets for 10 min at 380 °C under air. A heating stage was used to prepare isothermally treated PEEK composites before DSC scan. The dependence of degree of crystallinity on the heating rate (10–80 °C/min) was investigated for specimens crystallized at different temperatures. The results indicated that 50 °C/min was an optimum heating rate to suppress the reorganization and to avoid the superheating of high crystallinity specimens with the sample weight of 10 mg. The upper peak temperature of double-melting peaks continued to increase with crystallization temperature. This peak temperature was related to the transition from regime II to III. The phenomenon of lower crystallinity and higher melting temperature supports the interpretation that the upper melting peak corresponded to crystals growing during the earlier stage of isothermal crystallization.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s10965-006-0060-9
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  • 3
    Electronic Resource
    Electronic Resource
    A Modified Method for T-CR-T Diagram Construction Application to Polyethylene Glycol (1998)
    Springer
    Journal of thermal analysis and calorimetry 52 (1998), S. 765-772 
    Details
    ISSN: 1572-8943
    Keywords: DSC ; isoconversional method ; polyethylene glycol ; T-CR-T diagrams
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The analysis of DSC experimental data from solidification is improved, thanks to a modified isoconversional method. The validity of the proposed method is tested for a polyethylene glycol with a mean molecular weight of 6000. The temperature-cooling rate-transformation diagrams reveal good agreement between the experimental and calculated data.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1010158406598
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  • 4
    Electronic Resource
    Electronic Resource
    Kinetics of Isothermal Crystallization of the Thermotropic Polyester Poly(ethylethylene-4,4-diphenoxyterephthalate) (1998)
    Springer
    Journal of thermal analysis and calorimetry 53 (1998), S. 35-47 
    Details
    ISSN: 1572-8943
    Keywords: DSC ; isothermal crystallization ; thermotropic polyester
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Differential scanning calorimetry was used to study the isothermal kinetics of three-dimensional ordering formation from the mesophase of the thermotropic polyester poly(ethylethylene-4,4-diphenoxyterephthalate). An Avrami exponent of 4 was found and the measured rates of transformation were related with the efficiency of packing. A nucleation and growth process was assumed in the determination of the temperature coefficient, and the interfacial free energies are discussed in terms of the chain flexibility.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1010149705901
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  • 5
    Electronic Resource
    Electronic Resource
    Thermoanalytical and Spectral Study of Efaroxan Hydrochloride (1998)
    Springer
    Journal of thermal analysis and calorimetry 53 (1998), S. 71-85 
    Details
    ISSN: 1572-8943
    Keywords: DSC ; enantiomer ; IR ; powder X-ray diffractometry ; racemate ; TG ; thermomicroscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The physicochemical characterization of the solid-state enantiomers and racemate of efaroxan hydrochloride (C13H17N2O+Cl-, M=252.5 g mol-1) was performed by thermoanalytical methods (differential scanning calorimetry, thermogravimetry and thermomicroscopy) and spectral methods (infrared spectrometry and X-ray diffractometry). The efaroxan enantiomers and racemate were shown to be unstable near the melting point. At the beginning of the decomposition, a loss of hydrogen chloride was observed. However when sealed pans were used, the compounds decomposed at higher temperature, allowing a precise evaluation of the melting enthalpies by means of differential scanning calorimetry. The nature of the racemate and its thermal stability were assessed by evaluating its free formation enthalpy. An enantiotropic solid-solid transformation (II→I) was noted for the racemate; the reverse process (I→II) follows zero-order kinetics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1010105923648
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  • 6
    Electronic Resource
    Electronic Resource
    On the Oximine Complexes of Transition Metals 106. Spectroscopic and DSC Study of Some Complexes of the Types [Cu(DioxH)2] and [CuX2·DioxH2] (1998)
    Springer
    Journal of thermal analysis and calorimetry 53 (1998), S. 421-429 
    Details
    ISSN: 1572-8943
    Keywords: copper(II)-oxime complexes ; DSC ; kinetic parameters
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Several new complexes of the types [Cu(DioxH)2] and [CuX2·DioxH2] (DioxH2: aliphatic or alicyclic α-dioxime) were obtained and characterized by means of near and far Fourier transformation IR spectroscopy. The thermal decompositions of seven complexes of these types were studied by using DSC measurement data. For several decomposition stages, apparent kinetic parameters were derived by means of the nomogram method.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1010129022837
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  • 7
    Electronic Resource
    Electronic Resource
    Derivation of Temperature-Modulated DSC Thermal Conductivity Equations (1998)
    Springer
    Journal of thermal analysis and calorimetry 54 (1998), S. 467-476 
    Details
    ISSN: 1572-8943
    Keywords: DSC ; TMDSC ; thermal conductivity ; thermal diffusivity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract One of the benefits of temperature-modulated DSC (TMDSC) is its ability to measure thermal conductivity and thermal diffusivity without DSC cell modifications or additional accessories. Thermal conductivity of solid materials from 0.1 to about 1 W m-1 K-1 measured. Applications of this approach have been discussed in the literature but no description is yet available concerning the derivation of the working equations. This presentation provides a detailed derivation of the working equations used to obtain thermal conductivity and thermal diffusivity from TMDSC data.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1010178022559
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  • 8
    Electronic Resource
    Electronic Resource
    Calorimetric study of Diepoxide Chain-Extended Poly(Ethylene Terephthalate) (1998)
    Springer
    Journal of thermal analysis and calorimetry 54 (1998), S. 721-729 
    Details
    ISSN: 1572-8943
    Keywords: branching ; chain extension ; cross-linking ; diepoxides or bis-epoxides ; DSC ; PET ; poly(ethylene terephthalate)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract A series of chain-extended PET samples were obtained by the use of different amounts of a diepoxide as chain extender, which was prepared for this purpose. These samples exhibited different intrinsic viscosities and degrees of branching or cross-linking. The effects of this differentiation on the thermal properties were studied by differential scanning calorimetry. The thermal parameters studied were the glass transition temperature (Tg), the cold-crystallization temperature (Tcc), the melting temperature (Tm), the enthalpy (ΔHm) and the degree of crystallinity. The data revealed that, the higher the quantity of chain extender or the chain extension time, the higher Tgand Tcc, but the lower Tmand ΔHm, i.e. the more amorphous the chain-extended samples, as also shown by density measurements.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1010127500694
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  • 9
    Electronic Resource
    Electronic Resource
    The Glass Transition of Water and Aqueous Systems (1998)
    Springer
    Journal of thermal analysis and calorimetry 52 (1998), S. 109-113 
    Details
    ISSN: 1572-8943
    Keywords: amorphous solid water ; aqueous systems ; DSC ; glass transition ; supercooling
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract After a brief introduction of the terms supercooling, amorphous solid state, glass transition and devitrification, the known ways of production of amorphous solid water are discussed. DSC experiments with quench cooled aqueous solutions show the phenomenon of glass transition and devitrification.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1010166307917
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  • 10
    Electronic Resource
    Electronic Resource
    Investigation of the Plasticizing Effect of Dicarboxylic Acid Diesters on Starch Acetate (1998)
    Springer
    Journal of thermal analysis and calorimetry 52 (1998), S. 157-164 
    Details
    ISSN: 1572-8943
    Keywords: dicarboxylic acid ; DSC ; glass transition temperature ; mechanical parameters ; plasticizer
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract A study was made of the applicability of dicarboxylic acid diesters for the plasticization of starch acetate. The ratio of the carboxyl and methylene groups was found to be the most important criterion for the use of this group of substances. This ratio should have values between 0.45 and 0.66. From the available dicarboxylic acid diesters, the diethyl esters and dibutyl esters were investigated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1010174509734
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