Zobrazeno 91 - 100
of 156
pro vyhledávání: ''
Publikováno v:
Polymer Engineering & Science. 45:1639-1644
In this article, experimental results on the effect of CO2 sorption and desorption on the creep response of polycarbonate (PC) are presented. Tensile specimens machined from PC sheets were exposed to CO2 and the absorbed gas mass fraction ranged from
Publikováno v:
Polymer Engineering & Science. 46:160-171
Well-defined nano-topographies were prepared by electron-beam lithography and electroplated to form nickel-shims. The surface pattern consisted of square pillars repeated equidistantly within the plane of the surface in a perpendicular arrangement. T
Publikováno v:
Polymer Engineering & Science. 44:1351-1359
The effect of mechanical milling on free volume was studied by means of positron annihilation lifetime spectroscopy (PALS) in polystyrene (PS) as a typical brittle polymer and in polycarbonate (PC) as a tough representative. Long-time milling increas
Publikováno v:
Polymer Engineering & Science. 45:103-113
The experimental results presented in Part I of this study were used to evaluate the predictive capabilities of two viscoelastic constitutive models. One of the models, developed by Xia and Ellyin, is in a differential form. The other, which is a mod
Autor:
Richard Gendron, Louis E. Daigneault
Publikováno v:
Polymer Engineering & Science. 43:1361-1377
Extruded microcellular foams have been obtained from mixtures of polycarbonate (PC) and n-pentane. Cell diameters were in the range of 2 to 5 μm and the foam densities varied between 400 and 700 kg/m 3 . Although two types of PC have been investigat
Publikováno v:
Polymer Engineering & Science. 43:1011-1017
Supported zirconocene catalysts on a new support, MgO, were prepared and tested in ethylene polymerization. Three types of impregnation methods were employed to find an optimum supporting method for MgO. The direct impregnation of Cp 2 ZrCl 2 on MgO
Novel ultrasonic process forin-situ copolymer formation and compatibilization of immiscible polymers
Autor:
Chang Kook Hong, Avraam I. Isayev
Publikováno v:
Polymer Engineering & Science. 43:91-101
In-situ copolymer formation and compatibilization of immiscible polymers in blends were discovered to occur during ultrasonic-assisted extrusion in the melt state under high pressures. Residence times were of the order of seconds. The mechanical perf
Publikováno v:
ResearcherID
High performance epoxy-layered silicate nanocomposites based on tetra-glycidyl 4,4'-diamino-diphenyl methane (TGDDM) resin cured with 4,4'-diaminodiphenyl sulfone (DDS) have been successfully synthesized. Fluorohectorites modified by means of interla
Interpenetrating polymer networks based on carboxylated nitrile rubber and poly(alkyl methacrylate)s
Autor:
N. R. Manoj, B. C. Chakraborty, Debdatta Ratna, L. Chandrasekhar, V. Dalvi, P. C. Deb, M. Patri
Publikováno v:
Polymer Engineering & Science. 42:1748-1755
A series of interpenetrating polymer networks (IPNs) based on carboxylated nitrile rubber (XNBR) and poly(alkyl methacrylate)s such as poly(methyl methacrylate) (PMMA), poly(ethyl methacrylate) (PEMA) and poly(butyl methacrylate) (PBuMA) were synthes
Autor:
Joni Hietala, Timo Jaaskelainen, Tuula T. Pakkanen, Kari Mönkkönen, Esko J. Pääkkönen, Terho Kaikuranta, Pertti Pääkkönen
Publikováno v:
Polymer Engineering & Science. 42:1600-1608
A comprehensive experimental study was carried out to replicate sub-micron features using the injection molding technique. For the experiments, five different plastic materials were selected according to their flow properties. The materials were poly