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You searched on: Topic Area: Polymers

Displaying records 1 to 10 of 417 records.
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1. Infrared thermography of welding zones produced by polymer extrusion additive manufacturing
Topic: Polymers
Published: 7/2/2016
Authors: Jonathan Edward Seppala, Kalman D Migler
Abstract: In common thermoplastic additive manufacturing (AM) processes, a solid polymer filament is melted, extruded though a rastering nozzle, welded onto neighboring layers and solidified. The temperature of the polymer at each of these stages is the ke ...

2. Thermography and Weld Strength Characterization of Thermoplastic Extrusion 3D Printing
Topic: Polymers
Published: 5/23/2016
Authors: Jonathan Edward Seppala, Kaitlyn E Hillgartner, Chelsea Simone Davis, Kalman D Migler
Abstract: In fused filament fabrication (FFF), a material extrusion additive manufacturing (AM) method, thermoplastic filament is extruded though a rastering nozzle on prior layers building a 3 dimensional object. The resulting strength of the FFF produced ...

3. Pattern-Directed Phase Separation of Polymer-Grafted Nanoparticles in a Homopolymer Matrix
Topic: Polymers
Published: 5/12/2016
Authors: Ren Zhang, Bongjoon Lee, Michael R. Bockstaller, Sanat K. Kumar, Christopher M Stafford, Jack F Douglas, Dharmaraj Raghavan, Alamgir Karim
Abstract: The controlled organization of nanoparticle (NP) constituents into superstructures of well- defined shape, composition and connectivity represents a continuing challenge in the development of novel hybrid materials for many technological applicati ...

4. On the role of experimental imperfections in constructing 1H spin diffusion NMR plots for domain size measurements
Topic: Polymers
Published: 3/24/2016
Author: Ryan C Nieuwendaal
Abstract: We discuss the precision of 1D chemical-shift-based 1H spin diffusion NMR experiments as well as straightforward experimental protocols for reducing errors. The 1H spin diffusion NMR experiments described herein are useful on samples that contain com ...

5. Coupling of isotropic and directional interactions and its effect on phase separation and self-assembly
Topic: Polymers
Published: 2/16/2016
Authors: Debra Jean Audus, Francis W Starr, Jack F Douglas
Abstract: The interactions of molecules and particles in solution often involve an interplay between isotropic and highly directional interactions that lead to a mutual coupling of phase separation and self-assembly. This situation arises, for example, in prot ...

6. ASTM Workshop on Standards & Measurements for Tissue Engineering Scaffolds
Topic: Polymers
Published: 1/1/2016
Authors: Carl George Simon Jr., John Test, Michael Yaszemski, Reto Luginbuehl, Anthony Ratcliffe, Paul Tomlins
Abstract: A ,Workshop on Standards & Measurements for Tissue Engineering ScaffoldsŠ was held on May 21, 2013 and was sponsored by the American Society of Testing and Materials International (ASTM International) in Indianapolis, IN. The purpose of the work ...

Topic: Polymers
Published: 8/28/2015
Authors: Fan Zhang, Ivan Javni, Olivera Bili?, Nikola Bili? , Zoran S Petrovic, Jan Ilavsky
Abstract: Isosorbide, a renewable diol derived from starch, was used in combination with butane diol or alone as the chain extender in two series of thermoplastic polyurethanes with 50 and 70% soft segment concentration (SSC). Polyurethanes with 50% SSC based ...

8. Classification of Semiconducting Polymeric Mesophases to Optimize Device Post-Processing
Topic: Polymers
Published: 8/17/2015
Authors: Chad R Snyder, Regis J Kline, Dean M DeLongchamp, Ryan C Nieuwendaal, Lee J Richter, Martin Heeney, Iain McCulloch
Abstract: Semiconducting polymers form a variety of phases and mesophases that respond differently to post-deposition solvent or thermal treatments. Here it is shown that classification of these materials into their appropriate mesophases can be a useful tool ...

Topic: Polymers
Published: 6/22/2015
Authors: Fan Zhang, Ivan Javni, Olivera Bili?, Nikola Bili? , Zoran S Petrovic, Jan Ilavsky
Abstract: Isosorbide, a cyclic, rigid and renewable diol was used as a chain extender in two series of thermoplastic polyurethanes. Isosorbide was used in combination with butane diol or alone to examine the effects on polyurethane morphology. Two series of ma ...

10. Materials Testing Standards for Additive Manufacturing of Polymer Materials: State of the Art and Standards Applicability
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 8059
Topic: Polymers
Published: 5/15/2015
Author: Aaron M Forster
Abstract: Additive manufacturing (AM) continues to grow as an advanced manufacturing technique. The most recent industry report from Wohlers and Associates indicates AM represented $1.6Bin revenue from parts, systems, and other supporting industries in 201 ...

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