Zobrazeno 1 - 10
of 46
pro vyhledávání: '"J. J. AKLONIS"'
Autor:
V. B. Rele, J. J. Aklonis
Publikováno v:
Journal of Polymer Science: Polymer Symposia. 46:127-138
A brief review of the literature concerning damped Debye lattices as models for viscoelastic relaxation in the primary transition region is presented. We have observed that polystyrene plasticized with dioctylsebacate behaves in a fashion which is in
Autor:
J. J. Aklonis, J. Moacanin
Publikováno v:
Journal of Polymer Science Part C: Polymer Symposia. 35:71-76
Previously a method was developed for predicting the viscoelastic response of polymers undergoing scission reactions. These results are now extended to include crosslinking reactions. As for scission, at any given time the character of the network ch
Publikováno v:
Scopus-Elsevier
A multiordering parameter model for glass-transition phenomena has been developed on the basis of nonequilibrium thermodynamics. In this treatment the state of the glass is determined by the values of N ordering parameters in addition to T and P; the
Publikováno v:
Polymer Engineering and Science. 33:1308-1319
Steady shear vxiscosity, dynamic moduli and the appearance of fracture surfaces of model composites, consisting of monodisperse crosslinked polymeric spheres of varied composition in a polymethyl-methacrylate matrix, depend on the compatibility of fi
Autor:
J. J. Aklonis, Abel Espinoza
Publikováno v:
Polymer Engineering and Science. 33:486-496
The generalization of a multiordering parameter model to treat physical aging in polymeric glasses is more fully explored. In the past, this model has successfully rationalized most aspects of time dependent volume and enthalpy behavior; however, onl
Publikováno v:
Polymer Engineering and Science. 32:1418-1425
The rheological properties of polystyrene (PS) and poly(methyl methacrylate) (PMMA) composites filled with monodisperse sized crosslinked polymeric particles are sensitive to processing history and chemical composition. Particles compatible with the
Publikováno v:
Journal of Polymer Science Part B: Polymer Physics. 30:1189-1194
Monodisperse sized crosslinked polystyrene (PS) beads prepared by reaction of styrene (S) and divinylbenzene (DVB), in batch emulsion copolymerization in the absence of emulsifiers, are not uniformly crosslinked, because DVB is more reactive than S.
Publikováno v:
Journal of Polymer Science Part A: Polymer Chemistry. 30:2443-2449
Monodisperse polymethacrylonitrile beads of varied size and crosslink density are prepared by emulsion copolymerization of methacrylonitrile and allylmethacrylate in the absence of emulsifier. The particle size is very sensitive to polymerization tem
Publikováno v:
Journal of Applied Polymer Science. 45:1355-1360
Boron, aluminum, and gallium tristriflate are new effective catalysts for the polymerization of tetrahydrofuran (THF). High-molecular-weight polytetrahydrofuran (PTHF) obtained in excellent yield in the bulk polymerization of THF at ambient temperatu
Publikováno v:
Polymer Engineering and Science. 32:777-785
Steady shear viscosities and dynamic moduli of polymer composites, consisting of combinations of crosslinked beads and matrices of polystyrene (PS) and polymethacrylates (PMA), are measured in a cone and plate rheometer. Viscosities and moduli were v