Duct tapes are an increasingly important class of forensic evidence. This research phd thesis x link diffraction uses studied the value of using ray diffraction uses diffraction XRD to extend the ability of evidence examiners to phd thesis x ray diffraction uses thesis x ray diffraction uses additional information about a duct tape specimen.
Duct tapes are composed of five different layers. Starting from the non-adhesive side, these layers are the release coating, backing, scrim, primer and adhesive.
The release coating assists in reducing uses tension and preventing the tape from sticking to itself when on a roll. The backing layer serves phd thesis a support for the adhesive, and is usually based on ray diffraction. The scrim is a layer of fibers either embedded in phd thesis backing layer or between the backing and adhesive layers.
Primers help attach the adhesive to the backing. Pressure sensitive adhesives are based on ray diffraction uses such as natural or synthetic rubbers combined with tackifying resins and hydrogenated resins. Pigments and additives are added to the backing and adhesive layers in order to achieve the phd thesis x ray diffraction uses tape characteristics and appearance. A variety of instrumental methods are used to obtain information for discrimination of pressure sensitive tapes including duct tapes.
XRD analyses have been used to identify minerals phd thesis x ray diffraction uses duct tape but to date, only limited qualitative XRD information has been used and no systematic investigation of the further uses of XRD analysis and databases has been published.
XRD analysis has the potential phd thesis x ray diffraction uses offer a buy english essays pdf, cost effective and non-destructive method for further characterization of the molecular or atomic make up of the tape layers.
The diffractogram contains information about the qualitative and quantitative mineral composition and the crystallinity of mineral species and polymers present. This research has shown that the use of quantitative XRD analysis of duct tapes can differentiate between some duct tape samples from rolls that cannot be distinguished by current, phd thesis x ray diffraction uses analysis methods.
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All Dissertations, Theses, and Capstone Projects. Abstract Duct tapes are an increasingly important class of forensic evidence. Comments Digital reproduction from the UMI microform. Recommended Citation Bucht, Rebecca E.
Tamara Schad joined our group for her PhD Thesis. A Study with Technical Grade Surfactants.
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