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  • 1
    Electronic Resource
    Electronic Resource
    High-pressure hydrogenation of nitrile rubber: thermodynamics and kinetics (1991)
    s.l. : American Chemical Society
    Industrial & engineering chemistry research 30 (1991), S. 1086-1092 
    Details
    ISSN: 1520-5045
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ie00054a003
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  • 2
    Electronic Resource
    Electronic Resource
    Studies on crosslinking of EPDM-PE blends by thermoanalytical techniques (1991)
    Springer
    Journal of thermal analysis and calorimetry 37 (1991), S. 19-38 
    Details
    ISSN: 1572-8943
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Mittels DSC, Brabender Plasticorder und Rheometer wurde der Einfluß von Mischungsverhältnis und Peroxidkonzentration auf den Vernetzungsverlauf von EPDM-PE-Gemischen untersucht. Die Vernetzung von EPDM-PE-Gemischen verläuft nach einer Reaktion erster Ordnung. Je höher der Anteil von EPDM im Gemisch, um so exothermer ist die Vernetzung und um so kleiner ist die dazugehörige Aktivierungsenergie. Mit dem Anwachsen der DCP-Konzentration bis zu einem gewissen Niveau wächst der exotherme Charakter, während die Aktivierungsenergie fast unabhängig von der Peroxidkonzentration ist. Mit dem Anstieg des EPDM/PE-Verhältnisses wächst die vernetzungsgeschwindigkeit, während die optimale Vernetzungszeit und der Energieverbrauch für die Vernetzung sinken. Es wurde ein Verfahren zur Bestimmung der Vernetzungseffizienz bei Mischsystemen entwickelt, um Eigenschaften und Vernetzungsverhalten von Gemischen voraussagen zu können.
    Notes: Abstract The effect of blend ratio and peroxide concentration on crosslinking characteristics of EPDM-PE blends were studied by Differential Scanning Calorimetry, Brabender plasticorder and Rheometer. Crosslinking of EPDM-PE blends follows first order reaction kinetics. The curing exotherm increases but activation energy decreases with increase in EPDM content in the blends. The same however increases with the increase in concentration of DCP upto a certain level, while the activation energy is almost independent of peroxide concentration. The cure rate increases whereas optimum cure time and energy consumption for curing decrease with increase in the EPDM-PE ratio. A method for determination of crosslinking efficiency in the case of blend systems was developed from high temperature modulus to predict the properties and the curing behaviour of the blends.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01913078
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Fractographic investigation of tensile and fatigue fracture surfaces of rubber containing inhomogeneous inclusions (1986)
    Springer
    Journal of materials science 5 (1986), S. 1042-1044 
    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/BF01730277
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  • 4
    Electronic Resource
    Electronic Resource
    An investigation on the failure envelopes of carbon black-filled natural rubber and styrene-butadiene rubber vulcanizates (1990)
    Springer
    Journal of materials science 9 (1990), S. 1379-1382 
    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/BF00721589
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  • 5
    Electronic Resource
    Electronic Resource
    Quantitative measurement of roughness of fractured rubber surfaces by an image processing technique (1996)
    Springer
    Journal of materials science 31 (1996), S. 3043-3050 
    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 In this paper, an image processing technique has been employed to quantitatively analyse various fractured surfaces of rubber and measure roughness. The image surfaces are represented in terms of a closed set of orthogonal polynomials. The significant orthogonal effects are measured and combined to represent the local texture, called pronum. The frequency of occurrence of the pronums is the prospectrum, a global descriptor. A few statistical parameters have been calculated from the prospectrum and correlated to the roughness of the fractured surfaces. Using the image processing technique, the laborious procedure involved in quantification, especially of irregular microfeatures, has been shown to be overcome.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00356020
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  • 6
    Electronic Resource
    Electronic Resource
    Scanning electron microscopy studies of abraded rubber surfaces (1981)
    Springer
    Journal of materials science 16 (1981), S. 1654-1660 
    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 surfaces of polybutadiene rubber (BR) and styrene-butadiene rubber (SBR) subjected to different degrees of abrasion have been studied by scanning electron microscopy (SEM). In the case of SBR it has been shown that abrasion begins with marks in the direction of rotation which are followed by fine ribbing and then by the formation of coarse, angular and prominent ridges. Prolonged abrasion produces folding and cavities on the surface. This change in abrasion mechanism has been explained as a result of heat build-up and high crack growth rate in SBR which occur beyond a certain stage. These help in softening the matrix and removing the surface. On the other hand, fractured surfaces of BR show that ridges begin to form at about 250 revolutions and there is no characteristic difference between the abraded surfaces at lower or higher degrees of abrasion.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02396884
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  • 7
    Electronic Resource
    Electronic Resource
    Micromechanism of failure of thermoplastic rubber (1990)
    Springer
    Journal of materials science 25 (1990), S. 2985-2989 
    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 fracture surface morphology of various thermoplastic rubber and rubber vulcanizates based on natural rubber (NR), ethylene propylene diene rubber (EPDM), nitrile rubber (NBR), polyethylene (PE) and polypropylene (PP), namely NR-PE, NR-PP, EPDM-PE, EPDM-PP and NBR-PP, has been studied over a range of blend ratios, levels of interaction, rates, temperatures and modes of testing. The fracture surface changes with changes in blend ratio. Incorporation of a third component like EPDM or chlorinated polyethylene (CPE) to a certain percentage does not change the fracture morphology. Sulphur curing in the NR-PE blend generates a ductile matrix like rubber whereas large fissures are observed for peroxide-cured systems. Modification of both rubber and plastic also changes the surface morphology. The samples tested at various temperatures, rates and modes show similar features on the fracture surface.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00584915
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  • 8
    Electronic Resource
    Electronic Resource
    Scanning electron microscopy studies of abraded rubber surfaces (1981)
    Springer
    Journal of materials science 16 (1981), S. 1654-1660 
    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 surfaces of polybutadiene rubber (BR) and styrene-butadiene rubber (SBR) subjected to different degrees of abrasion have been studied by scanning electron microscopy (SEM). In the case of SBR it has been shown that abrasion begins with marks in the direction of rotation which are followed by fine ribbing and then by the formation of coarse, angular and prominent ridges. Prolonged abrasion produces folding and cavities on the surface. This change in abrasion mechanism has been explained as a result of heat build-up and high crack growth rate in SBR which occur beyond a certain stage. These help in softening the matrix and removing the surface. On the other hand, fractured surfaces of BR show that ridges begin to form at about 250 revolutions and there is no characteristic difference between the abraded surfaces at lower or higher degrees of abrasion.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00553979
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  • 9
    Electronic Resource
    Electronic Resource
    Influence of interaction promoter on the properties of thermoplastic elastomeric blends of natural rubber and polyethylene (1988)
    Springer
    Journal of materials science 23 (1988), S. 2187-2194 
    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 influence of a third component as interaction promoter on the properties of natural rubber-polyethylene thermoplastic blends, both uncured and cured, has been studied. The third component chosen has some structural similarity with polyethylene and is amorphous in nature. Ethylene propylene diene (EPDM) rubber, chlorinated polyethylene and chlorosulphonated polyethylene have been used as the third component. All the third components have better adhesion with the plastic phase and the rubber phase. The adhesive strength is highest with EPDM. The properties are improved by using the above third components both for cured and uncured blends. In comparing the properties, the strength of the composite is divided by the modulus of the composite to take care of the hard-phase contribution. The size of the dispersed domain is reduced by using the third component and is approximately 1.2 μm. All the properties could be explained in terms of the strengths of the individual phases, the morphology and the adhesion between components.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01115787
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  • 10
    Electronic Resource
    Electronic Resource
    Threshold tensile strength and modulus of carbon-black-filled rubber vulcanizates (1990)
    Springer
    Journal of materials science 25 (1990), S. 3524-3530 
    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 threshold tensile strength and modulus of carbon-black-filled natural rubber and styrenebutadeine rubber vulcanizates have been determined. N-220, N-330, N-375, N-550 and N-660 carbon blacks at various loadings have been used. The threshold strength varies between 0.4 MPa for gum vulcanizate to ∼3 Mpa for 50 phr loaded samples. Both the threshold strength and modulus are dependent on the nature and loading of the filler. The theoretical and experimental values of threshold strength and modulus are in good agreement.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00575382
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