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Synthesis and Properties of UV-Curable Polyurethane Acrylates Based on Pcdl Diols

Jingcheng Liu, Jiangnan University

Abstract: UV-curable polyurethane (UV-PUA) was synthesized based on polycarbonate diols (PCDL) with different molecular weight and end-capping groups. Methylacrylate-β-hydroxyethyl methacrylate (HEMA) and pentaerythritol triacrylate (PET3A) was used to impart mono-methacrylate, and tri-acrylate functionality to the end-capping group, respectively. FTIR, GPC, UV spectroscopy and tensile test were used to characterize the UV-PUA. The results showed that: with the increasing of the molecular weight of PCDL, the molecular weight and viscosity of the UV-PUA was increasing, Young's modulus of the UV-curable film becomes smaller but the elongation at break becomes larger in the tensile test; The molecular weight and viscosity of the UV-PUA end-capped by PET3A was larger than those end-capped by HEMA, Young's modulus of the UV-curable film of the former was larger than the latter, but the elongation at break was smaller. All the films of UV-PUA showed excellent chemical resistance.

The Importance of Controlling Coating Temperature in UV Application Processes

Michael R. Bonner, Saint Clair Systems, Inc.

Abstract: In this presentation, we examine the temperature vs. viscosity characteristics of UV cure coatings and demonstrate how variations in viscosity caused by changes in coating temperature at the point of application produce significant variations in the outcome of the coating process.  While directly applicable to the end-user, this information is also extremely important for the formulator to understand as they are trying to develop coatings for specific applications.

Comparison a Blue Diode Laser with a Mercury Arc Lamp in the Curing of a Water-Soluble Resin by Pho

Pamela Shapiro, Netzsch Instruments, LLC

Abstract: Photo-differential scanning calorimetry (Photo-DSC) and photo-dielectric analysis (Photo-DEA) are powerful analytical tools for examining the dependence of UV-curing kinetics on different light sources, resin formulations, and process conditions.  In this presentation, the efficiencies of two different radiation sources, a Hg arc lamp with a broad band filter (320 nm to 500 nm) and a 447 nm blue laser will be compared in the curing of blue-curing adhesives used for stereolithography.

Photo-Rheology Coupled With Real Time Ftir

Branislav Husar, Vienna University of Technology

Abstract: A commercial prototype of a rheometer coupled with a light source and a fast responding MCT detector is presented. The setup allows monitoring of changes of viscoelastic properties as well as changes in chemical structure by means of near and mid infrared spectroscopy in the course of photopolymerization.

RadTech 2014 News

Technology Awards for Innovation: Fungi, Heart Patches, Cell Phone Displays, Carbon Steel, and a Geriatric ER
Users from Packaging to Metal to Plastics to Additive to Medical & Beyond To Speak at RadTech 2014, including:
  • Nestle, Printing and Packaging
  • Conforming Matrix and Helios at our new UV+PVD Session: Chrome Alternative for Home, Cosmetic and Auto Applications
  • Harvard University Medical, Emerging Technology Award for their UV cure heart adhesive. (Please join us to honor our customers at the event awards dinner, all winners will be announced shortly)
  • JMC Steel Group, Pipe+Tube
  • The Boeing Company, High Performance Coatings
  • Motorola and American Trim, Plastics Decorating
  • BJS Group AB and American Trim, UV LED: The Global Roundtable
  • Stratasys, Design Enabled by UV+EB
  • Made Boards, Additive Manufacturing/3D Printing
  • Guardian, Advanced Materials
  • Corning Inc., Equipment
  • Idex and IPRS, Customer Perspectives: UV High Performance Coatings
  • Carestream, New Product Debut
And don't forget to sign up for: Our "Undergrad", "Grad", Design of Experiments and/or Click Chemistry short courses!


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