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  • 1
    Electronic Resource
    Electronic Resource
    A capacitive detector to test the principle of equivalence in a free fall experiment (1992)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 63 (1992), S. 3112-3119 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: We describe a system of capacitive transducers applied to two free falling objects with the aim of detecting differential accelerations due to nonNewtonian components. The two objects have a cylindrical shape to minimize the systematic errors and they fall in a microgravity condition inside a vacuum tube released by a stratospheric balloon at an altitude of 40 km. The calibration of the capacitive transducers performed in laboratory has shown that it is possible to detect differential accelerations Δa (approximately-less-than) 1.4 × 10−10 m s−2.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1142563
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  • 2
    Electronic Resource
    Electronic Resource
    A new class of aromatic poly-ether-aroyl-oxadiazoles. II. Studies on the cyclization reaction, infrared, structural, and morphological characterization (1994)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part B: Polymer Physics 32 (1994), S. 1249-1256 
    Details
    ISSN: 0887-6266
    Keywords: polyoxadiazoles ; IR ; structure ; morphology ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Poly-ether-aroyl-oxadiazoles (PEODZ) of general formula: are reported.Thermal cyclization of the starting polyhydrazides, infrared, thermal, and structural characterization are discussed as function of the number of methylene spacers in the range 2-12.It is found that the position of melting is strongly dependent upon the number of—CH2—, and that moldable polyoxadiazoles are obtained at × values 〉 7. The spherulitic nature of PEODZ is clearly revealed by thermal-optical microscopy which, together with isothermal crystallizations at the differential scanning calorimeter, gives a close insight into the crystalline organization of such polymers. © 1994 John Wiley & Sons, Inc.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/polb.1994.090320712
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  • 3
    Electronic Resource
    Electronic Resource
    Thermal and structural analysis and crystallization behavior of new poly(ether-alkyl) oxadiazoles (1994)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part B: Polymer Physics 32 (1994), S. 1643-1651 
    Details
    ISSN: 0887-6266
    Keywords: polyoxadiazoles ; structural analysis ; cristallinity behavior ; cyclodehydration reaction ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: A new series of poly(ether-alkyl)oxadiazoles of general formula: with m = 3, 4, and 5 has been obtained from the corresponding polyhydrazides through thermal cyclization reaction. The polymers were characterized by infrared spectroscopy, differential scanning calorimetry, wide-angle x-ray analysis, and optical microscopy. The polymers were crystalline, with a crystalline texture and structural parameters strongly dependent on the value of m. The Tm's and Tg's value decreased with increasing number of CH2. © 1994 John Wiley & Sons, Inc.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/polb.1994.090320907
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  • 4
    Electronic Resource
    Electronic Resource
    High density polyethylene/hydrogenated oligo(cyclopentadiene) blends: Phase structure, thermal and mechanical properties (1994)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part B: Polymer Physics 32 (1994), S. 2025-2035 
    Details
    ISSN: 0887-6266
    Keywords: high density polyethylene ; hydrogenated oligo (cyclopentadiene) ; miscibility ; blends ; phase structure ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The article discusses the influence of an oligomeric resin, hydrogenated oligo (cyclopentadiene) (HOCP), on the morphology and properties of its blends with high density polyethylene (HDPE). HDPE/HOCP blends after solidification contain three phases: the crystalline phase of HDPE and two amorphous phases, one rich in amorphous HDPE and the other in HOCP. DSC thermograms and the loss modulus behaviors show that the γ transition is influenced by HOCP molecules and, in addition to the αc transition of HDPE, there is another transition that is attributed to the HOCP-rich phase. The hypothesis of the two amorphous phases is confirmed by the optical microscopy observations performed on isothermally crystallized blend films. © 1994 John Wiley & Sons, Inc.
    Additional Material: 13 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/polb.1994.090321209
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