Zobrazeno 1 - 10 of 483 pro vyhledávání: '"Roger S. Porter"'
3
Temperature dependence of polymer viscosity. The influence of shear rate and stress
Autor: Roger S. Porter, Julian F. Johnson
Publikováno v: Journal of Polymer Science Part C: Polymer Symposia. 15:365-371
Apparent flow activation energies evaluated from viscosity changes with temperature can be calculated in the non-Newtonian region at either constant shear rate, E, or at constant shear stress, E. For many linear, amorphous polymere, it can be shown t
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d64bde51b13f4b2c3e04bdee4ce408d6
https://doi.org/10.1002/polc.5070150132
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4
Formation properties of solid-state extruded high density polyethylene fibers
Autor: Roger S. Porter, W. T. Mead
Publikováno v: Journal of Polymer Science: Polymer Symposia. 63:289-312
Extrusion rates have been measured for high density polyethylene fibers prepared by solid-state extrusion through a conical die with maximum draw ratio of 52, using constant pressure and temperatures ranging from 0.12 to 0.49 GPa and 60° to 140°C a
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::fb907d5166b5706caab379bc8a3b95e4
https://doi.org/10.1002/polc.5070630125
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5
Rheology of concentrated solutions of poly(γ-benzyl-glutamate)
Autor: Roger S. Porter, Gabor Kiss
Publikováno v: Journal of Polymer Science: Polymer Symposia. 65:193-211
Steady shear viscosity, dynamic viscosity, dynamic modulus, and normal force were measured via rotational rheometry for concentrated solutions of racemic mixtures of poly(benzyl-L-glutamate) and poly(benzyl-D-glutamate) in m-cresol. A transition from
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::546ee00f04acbd61b70cca3a87948a3d
https://doi.org/10.1002/polc.5070650117
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6
Extrusion degradation of a high molecular weight polystyrene
Autor: K. Peter Goetze, Roger S. Porter
Publikováno v: Journal of Polymer Science Part C: Polymer Symposia. 35:189-200
Mechanochemical research has been extended to the study of the magnitude and mechanism for the capillary shear degradation of a narrow distribution and high molecular weight polystyrene (Mw 1,800,000). An Instron Capillary Rheometer was used to perfo
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::be6ef2ed65203ca8d124f29404ba42f7
https://doi.org/10.1002/polc.5070350115
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8
Polyisobutene Degradation in Laminar Flow: The Effect on Molecular Weight Distribution
Autor: Manfred J. R. Cantow, Roger S. Porter, Julian F. Johnson
Publikováno v: Journal of Polymer Science Part C: Polymer Symposia. 16:1-12
Polyisobntene solutions in n-hexadecane and 1,2,4-trichlorobenzene have been mechanically degraded in laminar flow under known and homogeneous stresses up to 105 dyne/cm.2 and at several temperatures in a thin-film, rotational concentric cylinder vis
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1865ad7d5f66934fdb9b53f4e5ae1426
https://doi.org/10.1002/polc.5070160102
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10
Elektronická kniha
Analytical Calorimetry : Volume 3
Autor: Roger S. Porter, Julian F. Johnson
The research reported in the third volume of Analytical Calorimetry covers a wide variety of topics. The variety indicates the sophistication which thermal analysis is reaching and addition­ ally the ever widening applications that are being develop
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