Journal
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
Volume 103, Issue 2, Pages 439-445Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s00339-011-6361-9
Keywords
Laser welding; Polyethylene joints; Carbon nanotubes; Structural modification; Shear force
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This paper reports a study of the laser welding of polymeric joints composed by two polyethylene sheets, one pristine and the other filled by carbon nanotubes. In order to know the material modifications occurring during the laser exposure and the phenomena that seal the polymeric sheets, the physical, chemical and mechanical features of the welded area were analysed. The mechanical resistance of the welded joint and the structural changes of the polymer were checked by mechanical shear tests, absorption coefficient measurements, calorimetric analyses, mass quadrupole spectrometry and electron microscopy. The welding effectiveness was investigated as a function of the filler concentration.
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