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  • Polymer and Materials Science  (3)
  • Analytical Chemistry and Spectroscopy  (1)
  • Wiley-Blackwell  (4)
  • American Chemical Society (ACS)
  • American Institute of Physics (AIP)
  • Oxford University Press
  • 2005-2009
  • 1990-1994  (4)
  • 1980-1984
  • 1955-1959
  • 1992  (4)
Collection
Keywords
Publisher
  • Wiley-Blackwell  (4)
  • American Chemical Society (ACS)
  • American Institute of Physics (AIP)
  • Oxford University Press
Years
  • 2005-2009
  • 1990-1994  (4)
  • 1980-1984
  • 1955-1959
Year
  • 1
    Electronic Resource
    Electronic Resource
    Planar deformation of amorphous poly(ethylene terephthalate) by stretching and forging (1992)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part B: Polymer Physics 30 (1992), S. 687-691 
    Details
    ISSN: 0887-6266
    Keywords: poly(ethylene terephthalate), amorphous, planar deformation of ; deformation of PET by stretching and forging ; drawing techniques and deformation of PET ; crystallization in drawn PET ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The planar deformation of amorphous poly(ethylene terephthalate) (PET) was performed by stretching and by forging under comparable conditions at a series of constant temperatures, 80, 90, 100, and 110°C. The highest planar draw ratios of 4.5 × 4.5 and 3.5 × 3.5 were obtained by forging and stretching, respectively. Samples were studied before and after deformation by wide angle x-ray scattering (WAXS), differential scanning calorimetry (DSC), density measurements, and elastic recovery at 100°C. A distinct difference in efficiency of draw between these two techniques is found, as judged mainly by the straininduced crystallization. The forging is more effective than stretching in achieving stabilized planar draw under comparable process conditions.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/polb.1992.090300705
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  • 2
    Electronic Resource
    Electronic Resource
    Polyester adhesion to chromium-coated steel for poly(ethylene terepthalate) and an isophthalate copolymer (1992)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 44 (1992), S. 1679-1683 
    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: The performance of PET [poly(ethylene terephthalate)] and a copolymer of PET has been tested as an adhesive for chromium-coated steel. Crystallinity in the polyesters is found to limit adhesion, probably by restricting chain mobility. Lamination temperatures above the melting point of each polyester give the best adhesion. Degradation of the polyesters at yet higher temperature resulted in both reduced polymer cohesion and adhesion.Optimum bonding to steel was obtained at lamination temperatures between 230 and 275°C for the copolyester and between 280 and 300°C for PET. The standard laminate compression time was 15 min at 50 kg/cm2. Adhesion was evaluated by the ASTM T-peel test. Assessments were made by both the peel energy and the peak load for peel.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1992.070440923
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  • 3
    Electronic Resource
    Electronic Resource
    Molecular geometry and chain entanglement: parameters for the tube model (1992)
    Basel : Wiley-Blackwell
    Die Makromolekulare Chemie, Theory and Simulations 1 (1992), S. 119-128 
    Details
    ISSN: 1018-5054
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The tube diameter in the reptation model is the distance between a given chain segment and its nearest segment in adjacent chains. This dimention is thus related to the cross-sectional area of polymer chains and the nearest approach among chains, without effects of thermal fluctuation and steric repulsion. Prior calculated tube diameters are much larger, about 5 times, than the actual chain cross-sectional areas. This is ascribed to the local freedom required for mutual rearrangement among neighboring chain segments. This tube diameter concept seems to us to infer a relationship to the corresponding entanglement spacing. Indeed, we report here that the critical molecular weight, Mc, for the onset of entanglements is found to be Mc = 28 A/(〈R2〉0/M), where A is the chain cross-sectional area and 〈R2〉0 the mean-square end-to-end distance of a freely jointed chain of molecular weight M. The new, computed relationship between the critical number of backbone atoms for entanglement and the chain cross-sectional area of polymers, Nc = A0,44, is concordant with the cross-sectional area of polymer chains being the parameter controlling the critical entanglement number of backbone atoms of flexible polymers.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mats.1992.040010302
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  • 4
    Electronic Resource
    Electronic Resource
    Capillary column gas chromatography/tandem mass spectrometry verification of chemical warfare agents (1992)
    New York, NY : Wiley-Blackwell
    Rapid Communications in Mass Spectrometry 6 (1992), S. 717-718 
    Details
    ISSN: 0951-4198
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: Chemical weapons use, although prohibited by the 1925 Geneva Protocol, has been reported in several armed conflicts including the Iran/Iraq war. The use of these weapons during this conflict and the concern over possible use of chemical warfare (CW) agents during the Persian Gulf war has heightened international awareness and prompted many nations to pursue with incresed vigour the signature of a new Chemical Weapons Convention. The most recent draft of the Chemical Weapons Convention contains a number of provisions aimed at developing a treaty that will enable nations to ensure compliance by all signatory nations. Compliance monitoring will be required in a number of scenarios, including the verification of alleged use, the storage and destruction of chemical weapons stocks and ensuring that industrial sites are not illegally producing CW agents. It follows from this draft treaty that compliance monitoring will require a high level of sophisticated analytical support to ensure the establishment of an enforceable treaty. The United Nations Conference on Disarmament therefore formed a multi-national Technical Group on Instrumentation to address the analytical challenges confronting signatory nations.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/rcm.1290061117
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