ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    facet.materialart.
    Unknown
    A Rheodilatometer for Molten Polymers (1985)
    American Institute of Physics
    Details
    Publication Date: 1985-10-01
    Print ISSN: 0148-6055
    Electronic ISSN: 1520-8516
    Topics: Physics
    Published by American Institute of Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 2
    Electronic Resource
    Electronic Resource
    Measurements of the first normal-stress difference in a new Rheo-dilatometer for molten polymers: Triple-step-shear-strain tests for all K-BKZ constitutive equations (1986)
    Springer
    Rheologica acta 25 (1986), S. 501-506 
    Details
    ISSN: 1435-1528
    Keywords: First normal-stress difference ; K-BKZ model ; network-rupture ; flow-reversal ; Rheo-dilatometer
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Abstract Following the 3rd of a triple-step-shear-strain sequence, the relaxation of the first normal-stress difference,N 1 (t), has been measured for a sample (IUPAC “A”) of low-density polyethylene at 150 °C over a range of shear-strain magnitudes up to 28 shear units. A new cone-plate “Rheodilatometer” was used, giving sample volume change data as well as thrust and torque data during cone rotation. At 130 °C, prior measurements (described elsewhere) gave an upper limit of 0.001% for the volume change with IUPAC A; this gave an estimated error of only 1.7% in determiningN 1(t) from time-dependent thrust data. Wagner's network-rupture model (based on a postulated strain-induced irreversible network disentanglement process) gave quantitative agreement withN 1(t) data for IUPAC A at 150 °C over some of the ranges of time and shear-strain investigated. Wagner's earlier constitutive equation (of K-BKZ type) gave no quantitative agreement. Using a special choice of strain magnitudes in which the 3rd is half that of the 1st and 2nd, it is shown that a critical test of all K-BKZ equations can be made on the basis ofN 1 (t) data only. This test excludes all K-BKZ equations for IUPAC A under the conditions here used. In all the present investigations, the 1st and 3rd shears had the same sign while the 2nd had the opposite sign.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01774400
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Migration of polymer blend components during melt compounding (1990)
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 30 (1990), S. 1628-1632 
    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: In this paper it is shown that a core-shell impact modifier which is predispersed in one phase of a complex blend may migrate to another phase during melt compounding. The migration process appears to be driven by differences in the spreading behavior of the individual blend components. The details of the migration are analyzed by electron microscopy studies of partially compounded samples which were quenched, extracted, and separated from the extruder screw.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pen.760302412
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Melt homogeneity in injection molding: Application of a ring-bar device (1989)
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 29 (1989), S. 202-208 
    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: A thermocouple ring-bar device located between the nozzle and screw-tip was used to study the thermal homogeneity of a shot formed during injection molding. Axial and radial melt temperature profiles thus observed under various processing conditions illustrated the importance of screw channel volume-to-short-size ratio on melt homogeneity, Several methods of improving melt quality, as measured by this device, are demonstrated.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pen.760290308
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Numerical analysis of the temperature profile in the melt conveying section of a single screw extruder: Comparison with experimental data (1987)
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 27 (1987), S. 504-509 
    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 prediction and measurement off the developing radial temperature profile in a single-screw extruder is essential since excessive extrudate temperature and poor temperature uniformity at the die affect the quality of coextrusion and film/sheet extrusion processes. A finite-difference scheme is used to predict the development of the radial temperature profile in the metering section of a single-screw extruder for power-law fluids. A finite-element analysis of the flow around the screw-tip transposes this temperature profile onto an on-line temperature measuring device consisting of 10 thermocouples for a comparison of numerical results with experimental data on polycarbonates.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pen.760270705
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...