The SPE Library contains thousands of papers, presentations, journal briefs and recorded webinars from the best minds in the Plastics Industry. Spanning almost two decades, this collection of published research and development work in polymer science and plastics technology is a wealth of knowledge and information for anyone involved in plastics.
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Various topics related to sustainability in plastics, including bio-related, environmental issues, green, recycling, renewal, re-use and sustainability.
Michael Snowdon, Manjusri Misra, Amar Mohanty, May 2015
Bioethanol lignin based carbonaceous powder was prepared using carbonization and ball milling optimization to provide a material that may be used as a substitute to carbon black. The resulting carbon powder showed greater surface area and thermal conductivity to carbon black with particle sizes around 1 micrometer. The carbonized ball milled lignin was then compared against commercial carbon black as filler in the formation of thermoplastic composites. The lignin based carbon filler was able to perform similarly to carbon black by increasing the thermal conductivity but no enhancement in the electrical conductivity was evident for the biobased filler.
It is well established that the addition of solid particles that absorb light across ultra-violet (UV) wavelengths can improve the environmental durability of plastics. Thermoplastic polyester elastomers are sensitive to UV degradation in both exterior and interior applications. This paper describes an experimental evaluation of the improvement in UV performance of a polyester elastomer, Hytrel?, with the incorporation of a conventional chemical UV stabilizer along with different UV absorbing or scattering solid fillers. A rapid screening method is described that measures mechanical elongational properties as a function of UV exposure time. The results show that the particle type and size, the dispersion quality and melt compounding conditions affect UV durability.
Polylactic acid (PLA) was blended with corn zein and various compatibilizers in order to study a composite with potentially improved barrier and thermal properties. Thermogravimetric analysis (TGA) was used to characterize the thermal stability of the composites in comparison to pure PLA, and it was determined that the thermal properties, specifically the onset degradation temperature and rate of degradation of PLA and its composites are extremely dependant on the test method utilized. In this study pure Natureworks 2002D PLA displayed onset degradation temperatures ranging from 306øC to 360øC, depending on whether or not an isothermal hold was incorporated into the TGA method. Rather than improving the thermal stability of the PLA, the addition of corn zein catalyzed the reaction, increasing the rate of degradation, and decreasing the onset degradation temperature.
Kendra Allen, David Grewell, Eric Cochran, May 2015
Biobased plastics are becoming viable alternatives to petroleum-based plastics because they decrease dependence on petroleum derivatives and tend to be more environmentally friendly. Raw materials such as soy flour are widely available, low cost, lightweight, and can have high strength. In this study, soy flour was utilized as a filler in thermoplastic elastomer composites. Because weak interfacial adhesion between the soy flour and the elastomer and low water resistance pose challenges, a surface pretreatment, acetylation, was investigated for composites with soy flour concentrations of 10 wt%, 15 wt% and 20 wt%. Previous studies of the mechanical properties of these composites at 10 wt% determined that acetylation resulted in ultimate strength comparable to that of the pure elastomer. In this study, the chemical pathways of the reaction were verified and the thermo-mechanical properties characterized. Interfacial adhesion was characterized through scanning electron microscopy (SEM); the study determined that the acetylation reaction increased interfacial adhesion as indicated by smaller particle sizes and less agglomeration. Thermal properties were determined though thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). Acetylation reduced the intake of water by the soy flour, thus increasing the thermal stability of the composites. Increased thermal stability was indicated by a rise in decomposition temperature.
Miguel A. Hidalgo, Jos‚ H. Mina, Tim A. Osswald, May 2015
In order to design and manufacture natural fiber-polymer composites as structural components in existing and novel technological applications, the long term viscoelastic behavior of the materials must be understood. In order to do that, the time?temperature superposition principle (TTSP), is used to predict long-term viscoelastic behavior from short-term experimental data. Dynamic?mechanical analysis (DMA), was used to study the viscoelastic properties of composites made from fique mats and low-density polyethylene?aluminium (LDPE?Al) obtained from recycled long-life Tetra Pak packages. This paper reviews the effect in using Chemical treatments such as alkalinization with NaOH, silanization, and polyethylene impregnation treatments for composites, understanding the interaction mechanisms between natural fibers and the LDPE-Al; and presents the effects of treatments on the viscoelastic behavior. Fractographic evaluations in the scanning electron microscope (SEM) confirm the quantitative characterization obtained from DMA.
Antistatic/dust and ESD management demands are increasing at electronics relevant use plastics especially semiconductor handling area. Transparent performance also needed at specific area because confirm able inside without opening box to minimize contamination from outside. Electrical conductive carbon filler is one option, but it?s tough to achieve both these performance. On the other hand, primary antistatic agents like a surfactant type are questioned for their duration of the antistatic performance. This paper discusses refractive index matched transparent antistatic polycarbonate and polyester blends that offer transparency, sustainable antistatic performance, and cleanliness (lower out gassing, leachable ions).
Nylon is widely used in many applications. At the 2013 ANTEC in Cincinnati, our paper covered the results obtained with compounding primarily recycled nylon with the addition of small quantities of alternating ethylene and maleic anhydride ZeMac? copolymers and specific property improvements for applications in injection molded compounds. The resulting compounds have performance that can match or exceed prime virgin nylon at 30-50% cost savings. At the 2014 ANTEC in Las Vegas, our paper covered the performance enhancements to provide several advantages for upgrading virgin nylon such as increasing relative viscosity for improved melt strength and the unique improvements obtained in impact-modified nylon-6 and nylon-6,6 by reducing the negative impact of traditional impact modifiers by offering synergistic set of properties. This current paper will cover how using the unique chemistry of these copolymer products can reduce costs in nylon compounds and still meet performance specifications.
The intent of this paper is to demonstrate the truly permanent nature of a new patent protected heat fusion process for the transfer of graphics to polyethylene, polypropylene and other olefin products. As stated in Wikipedia, ?Heat fusion (sometimes called heat welding or simply fusion) is a welding process used to join two different pieces of a thermoplastic. This process involves heating both pieces simultaneously and pressing them together. The two pieces then cool together and form a permanent bond. When done properly, the two pieces become indistinguishable from each other. Dissimilar plastics can result in improper bonding.?
This paper will: Explain the difference between the new Polyfuze Graphic and other labeling processes such as In-Mold Labels (IML), Hot Stamp (Foil), Screen/Pad Printing and adhesive backed stickers. Define the environmental significance of each of these decorating methods vs. heat fused graphics.
Microstructure development during polymer processing is of interest for manufacturers in engineering the final properties. Injection molding advancements have facilitated molding components with complex geometries. With industry moving towards minimizing the polymer waste while retaining the component properties, it is necessary to understand the microstructure formation in detail. Progresses in the field of X-ray imaging techniques have made it possible to characterize polymers with sub-micron resolution. In the current work, we show the applicability of X-ray nanotomography in quantifying the skin-core morphology resulting from injection molding.
Costas Panayiotou, Ioannis Zuburtikudis , Apostolos Baklavaridis, January 2015
Reinforcing multiphase porous biopolymer composites with clay platelets increases their mechanical strength, making them a promising candidate for future tissue engineering applications.
Branden Lewandowski, Steven Ott, Louis Reifschneider, Victoria Finkenstadt, Zengshe Liu, Brent Tisserat, January 2015
Poor interfacial binding reduces the mechanical properties of 3D printed tensile bars prepared from filaments of blends of biomaterials with polylactic acid.
Charalabos Doumanidis, James Seferis , Vasileios Drakonakis, December 2014
Layered carbon-fiber-reinforced composites with a fractal-structured interlayer of carbon-nanotube-reinforced nanofibers show a high strength/weight ratio.
A smaller extrusion screw produces a recycled product with adequate mechanical and thermal properties for reuse in electronic and electrical applications.
Antonio A. Vicente, Ricardo Pereira, Loïc Hilliou , Marie-Alix Berthet, Jose A. Covas , Mara Cunha, September 2014
Beer spent grain fibers are a biodegradable waste resource that forms breathable thin films by conventional extrusion film blowing under processing conditions scalable to industrial production.
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Any article that is cited in another manuscript or other work is required to use the correct reference style. Below is an example of the reference style for SPE articles:
Brown, H. L. and Jones, D. H. 2016, May.
"Insert title of paper here in quotes,"
ANTEC 2016 - Indianapolis, Indiana, USA May 23-25, 2016. [On-line].
Society of Plastics Engineers
Available: www.4spe.org.
Note: if there are more than three authors you may use the first author's name and et al. EG Brown, H. L. et al.
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