Jens Kjær Jørgensen
Seniorforsker
Jens Kjær Jørgensen
Seniorforsker
Publikasjoner og ansvarsområder
The Effect of Fiber Concentration on Fiber Orientation in Injection Molded Film Gated Rectangular Plates
Fiber orientation in film gated injection-molded rectangular plates was characterized using micro computed tomography. Polyamide 12 materials with 15, 30, and 50 wt% glass fibers were used in this study. For all three materials, the typical core-shell layer structure of fiber orientation was observe...
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Fatigue performance of glass fibre – vinyl ester composite at ambient and subzero temperature.
Measuring deformation and mechanical properties of weld lines in short fibre reinforced thermoplastics using digital image correlation
Weld lines in injection moulded short fibre reinforced thermoplastics can significantly reduce the mechanical strength of a product. However, knowledge about the mechanical properties in the weld line region is limited. A reason for this is the difficulty in measuring strains at small scales. In thi...
Study on LLDPE molecular structure characterization by preparative and analytical cross-fractionation
Two grades of LLDPE were analysed by a number of methods for fractionation and molecular structure determination (molecular weight, branching density). Methods used were: preparative fractionation according to comonomer content (TREF) and molecular weight (solvent - non solvent), CRYSTAF, SEC, SEC-F...