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.
Thickness Measurement Methods Aiding Lightweighting of PET Bottles
The aim of lightweighting PET bottles is to reduce waste in material use by optimizing the design and manufacture process. Efficient lightweighting development requires adapting robust techniques for thickness measurements. Knowledge of the final thickness distribution at different locations of the bottle is essential for identifying critical locations that could be modified in the preform or mold. X-ray tomography, IR-based thickness measurements, and Hall Effect techniques have been demonstrated as nondestructive tools for thickness measurement. Some methods are slow or expensive. Here, a low cost method for thickness measurement of PET bottles based on cross section measurement also was demonstrated using an optical scanner.
Trends in Failure of Synthetic Polymers and Human Biopolymers
Some trends in failure are due to errors of design or bad judgment (plastics) or unwise life conditions (human biopolymers). An encouraging trend for human biopolymers is synthetic polymers designed as replacements for damaged biopolymers (electrical polymers for nerves, and targeted drug delivery). Environmental, recycling and health effects on failure are a strong recent trend in polymer failure. Examples are bisphenol A (BPA) and phthalate plasticizers, both limited by bans for health reasons. PVC is also attacked for health reasons. Even if a plastic is very worthy, inexpensive and was accepted for years, it may be considered for banning (PE thin bags).
Using Zemac® Copolymers to Upgrade Virgin Nylon Performance
Nylon is widely used in many applications. At the 2013 ANTEC, our paper covered the results obtained with compounding primarily recycled nylon with the addition of small quantities of alternating copolymers of ethylene and maleic anhydride 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. This current paper will cover the unique chemistry of alternating copolymers of ethylene and maleic anhydride to provide several advantages for upgrading prime or virgin nylon. For example, this paper will cover results of increasing relative viscosity and the advantages that brings to various applications. Another set of results will cover 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.
Why You Should Consider a Contour Printed Package
Contour Print aka distortion printing or preprint is nothing new to the thermoforming industry. We believe every innovative thermoformer has tried registering print at one time or another. What’s different about Contour Print is how it came about and why we think it will become a preferred package for brands, consumers and recyclers. Contour print was developed after attending PackEx, Sustainability/LCA, Product Design & other packaging conferences. Contour print takes into consideration the needs of all parties involved in consumer packaging: brand owners, retailers, consumers, recyclers and converters. By taking prominent recycled material like RPET, standard roll fed thermoforming equipment and adding the distorted printing you get a consumer friendly pack that’s easy to recycle. With public concerns for recycling and consumer confusion, using one material for the entire package greatly reduces this problem. Contour Print also reduces weight by replacing flat printed components with printing that is applied directly to the formed plastic package.
High-performance compostable polymer biocomposites
Blending modified polylactic acid with hemp or jute fibers using hot melt extrusion improves its mechanical properties and compostability.
SPE Bioplastic and Renewable Technologies Division Summer 2014 Newsletter
Read the latest issue of the SPE Bioplastic and Renewable Technologies Division newsletter.
Antibiotic wound dressings
Incorporating ampicillin into electrospun polyurethane makes bandages that control common infections.
Enhanced cold crystallization of glassy poly(L-lactic acid)
Glassy PLA samples prepared by rapid compression possess lower onset crystallization temperature, higher crystallization rate, and larger final crystallinity than samples prepared by other methods.
Bioplasticized poly(vinyl chloride)
Treatment with epoxidized soybean oil and bis(2-ethylhexyl) succinate for wire and cable applications softens the polymer but preserves tensile elongation properties after heat aging.
Enhancing properties and value of recycled plastics
Adding graphene nanoflakes to recycled high-density polyethylene drastically improves its performance.
Post-industrial waste nylon for automotive applications
Although slightly lower in tensile and fatigue strength, glass-fiber-reinforced waste nylon can be a viable substitute for reinforced prime nylon in cyclically loaded under-hood automotive applications.
Biopolyesters filled with date seed powder
Using date seed powder to reinforce the biodegradable polyesters poly-L-lactide and poly(butylene adipate-co-terephthalate) improves their properties.
Green technology for modification of poly(vinyl chloride)
Biodegradable poly(hydroxybutyrate) copolymers plasticize, toughen, improve processing, and reduce UV discoloration.
New biodegradable composites for food packaging
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.
Upcycling leather waste
Incorporating contaminated leather waste into natural rubber improves the rubber's mechanical properties and avoids improper disposal of toxins.
Choice of extrusion screw for recycling glass-fiber-reinforced liquid crystal polymer
A smaller extrusion screw produces a recycled product with adequate mechanical and thermal properties for reuse in electronic and electrical applications.
Green composites based on poly(butylene) succinate
Reinforcing poly(butylene succinate) with hemp fibers and shives enhances the biodegradation rate.
Electrically conductive nanocomposite
Adding graphene nanosheets to polymer blend polyamide 6/acrylonitrile butadiene styrene blends leads to electrically conductive nanocomposite materials at smaller threshold percolation.
Feather-inspired strong, light layered composites
Layered carbon-fiber-reinforced composites with a fractal-structured interlayer of carbon-nanotube-reinforced nanofibers show a high strength/weight ratio.
Autoclaved aerated concrete waste composites as a filler for natural rubber
Filling natural rubber with autoclaved aerated concrete waste enhances the processability and tensile and thermal properties of the composites.
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