High-Performance Transparent Laminates Based on Highly Oriented Polyethylene Films

Advanced composite materials reinforced with high-performance fibers like carbon, glass, aramid, or ultra-high-molecular-weight polyethylene are widely used as lightweight materials in the fields of automotive, aerospace, sports, and protection. However, nearly always these composites are opaque and/or absorb light, which greatly limits their application in areas where high optical transparency is desired such as impact-resistant windows and visors. In this work, composite laminates that combine high optical clarity with high mechanical properties are reported for the first time using highly oriented high-density polyethylene (HDPE) films as the reinforcing phase. A high optical transparency with a far-field light transmittance of around 85% was achieved for four-layer HDPE-reinforced laminates sandwiched between glass or polycarbonate (PC) sheets with either unidirectional (UD) or bidirectional (BD) orientations. In combination with outer layers of glass or PC, the fabricated transparent composite laminates show high tensile strength and also high penetration energy absorption, outperforming existing transparent materials like glass, laminated glass, or PC. These transparent composites combine both high mechanical performance and high optical clarity, providing great potential for future applications in structural glazing, automotive glazing, safety shields, visors, and displays for portable electronics

High mass photon pairs in lepton+ lepton-gamma gamma events at LEP

High mass photon pairs in lepton+ lepton-gamma gamma events at LEP Adriani, O.; Aguilar-Benitez, M.; Ahlen, S.P.; Alcaraz, J.; Aloisio, A.; Alverson, G.; Alviggi, M.G.; Ambrosi, G.; Linde, F.L. Published in: Physics Letters B DOI: 10.1016/0370-2693(92)91576-U Link to publication Citation for published version (APA): Adriani, O., Aguilar-Benitez, M., Ahlen, S. P., Alcaraz, J., Aloisio, A., Alverson, G., ... Linde, F. L. (1992). High mass photon pairs in lepton+ lepton-gamma gamma events at LEP. Physics Letters B, 295,[337][338][339][340][341][342][343][344][345][346] https://doi.org/10.1016/0370-2693(92)91576-U General rights It is not permitted to download or to forward/distribute the text or part of it without the consent of the author(s) and/or copyright holder(s), other than for strictly personal, individual use, unless the work is under an open content license (like Creative Commons). Disclaimer/Complaints regulations If you believe that digital publication of certain material infringes any of your rights or (privacy) interests, please let the Library know, stating your reasons. In case of a legitimate complaint, the Library will make the material inaccessible and/or remove it from the website. Please Ask the Library: https://uba.uva.nl/en/contact, or a letter to: Library of the University of Amsterdam, Secretariat, Singel 425, 1012 WP Amsterdam, The Netherlands. You will be contacted as soon as possible. Download date: 28 Jun 2019 Physics Letters B 295 (1992) From the analysis of the reactions e + e-~ g + g-(n?) (g = e, #, ~) we observe four events, one e+e -~'7 and three #+ ~-??, with the invariant mass of the photon pairs close to 60 GeV. These events were selected from a data sample collected in the L3 detector corresponding to 950000 produced Z°'s. More data are necessary to ascertain the origin of these events