SPE Library


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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Conference Proceedings

3D Characterization And Mechanical Analysis Of Polyethylene Foams Processed In Rapid Rotational Foam Molding
P. Karimipour-Fard | W. Y. Pao | R. Pop-Iliev | G. Rizvi, May 2018

Rapid Rotational Foam Molding (RRFM) products are integral cellular composites that consist of a solid skin which encapsulates a foamed core. This paper focuses on characterizing the morphologies in 3D and identifying the key mechanical properties of respective integral-skin polyethylene (PE) cellular structures produced in RRFM by making use of Micro-CT Scanner. Two types of PE grades were used to produce the foamed core, whereas a PE and a PP grade were used to produce the surrounding solid skin layer. The effects of varying relevant processing parameters such as: foam filling directions, processing temperatures and skin temperatures on the quality of the obtained foams were studied. In addition, the correlations between the resulting cellular structures, cell size distributions, and cell densities have been assessed. Finally, simultaneous stress-strain behavior and 3D structure changes were monitored with in-situ compression testing. The experimental results revealed that foam layers adjacent to the integral skin solid layer demonstrate a higher cell density compared to those located in the core, which affects the compressive strength of the material by 0.2 MPa. It was also observed that higher processing and skin temperatures cause increase in cell size, and conversely, decrease in cell density. Mechanical analysis results indicated that cellular structures near the skin have higher compressive strength, and in general, the manufactured LLDPE foam exhibited higher mechanical properties than the sHDPE foam. Compression tests revealed that foam cell size decreases through compression, while cell density was not specifically affected with increased strain.

3D Printing Feedstock From Recycled Materials
Nicole Zander, May 2018

United States Army warfighters in theater are often faced with the challenge of broken, damaged, or missing parts necessary to maintain the safety and productivity required. Waste plastics can be utilized to improve the self-reliance of warfighters on forward operating bases by cutting costs and decreasing the demand for the frequent resupplying of parts by the supply chain. In addition, the use of waste materials in additive manufacturing in the private sector would reduce cost and increase sustainability, providing a high-value output for used plastics. Experimentation is conducted to turn waste plastics into filament that can be used in fused deposition modeling. The effect of extrusion temperature and number of extrusion cycles on polymer viscosity and crystallinity are explored. The effect of blends and fillers to impart additional functionality are also examined. Tensile specimens were tested and compared to die-cut and injection molded parts. Parts printed from recycled polyethylene terephthalate had the highest tensile strength of all recycled plastics evaluated (35.1 ± 8 MPa), and were comparable to parts printed from commercial polycarbonate-ABS filament. Elongation to failure of all recycled plastics was similar to their injection molded counterpart. In addition, select military parts were printed with recycled filament and compared to original parts. This research demonstrates some of the first work on the feasibility of using recycled plastic in additive manufacturing.

Properties and Applications of Polyolefin Elastomers
Seema Karande, February 2018

Mark Demark Memorial Tutorial Lecture Series

Properties and Applications of Thermoplastic Vulcanizates
Craig Smith, February 2018

Mark Demark Memorial Tutorial Lecture Series

Medical Applications of Polyolefins
Ben Poon, February 2018

Mark Demark Memorial Tutorial Lecture Series

PR Resin for Healthcare Applications
Fabian Galindo, February 2018

Mark Demark Memorial Tutorial Lecture Series

Overview of Stabilization Systems for Gamma Irradiated Polyolefins
Rick King, February 2018

Mark Demark Memorial Tutorial Lecture Series

Stabilization Systems for Enabling Polyolefins in Building & Construction Applications
Joseph Fay, February 2018

Mark Demark Memorial Tutorial Lecture Series

Leveraging Technology to Consistently Deliver Industry Leading Performance
Frank Noeltgen, February 2018

Plenary: Industry Trends

Accelerating Sustainability in Petrochemicals
Larry Gros, February 2018

Plenary: Industry Trends

Global Trends and Drivers for Polyolefins Demand
Richard Sleep, February 2018

Plenary: Industry Trends

Polyolefins: Feast and Famine
Robert Bauman, February 2018

Plenary: Industry Trends

Mainstreaming Sustainable Chemistry
Dominique DeBecker, February 2018

Plenary: Industry Trends

"Managing" Regulatory Evaluations of Plastic Additives
David Horst, February 2018

Recent Advances in Additives

Aspects of UV Stabilization for Thick Section Polyehtylene
JungDu Kim, February 2018

Recent Advances in Additives

DiAlkyl HydroxylAmine(DAHA) Anti-Oxidant as a Long Term Heat Stabilizer
Ching Fan Chiu, February 2018

Recent Advances in Additives

Novel Antioxidant Solutions for Polypropylene with Enhanced Colour Performance
Warren Ebenezer, February 2018

Recent Advances in Additives

The Long-Term Stabilization of Polyolefins Demanding Applications
Niall Marshall, February 2018

Recent Advances in Additives

Unexpected Performance Improvements with a New Class of Liquid Polymeric Phosphites
Jacob Lance, February 2018

Recent Advances in Additives

Influence of Additives on Processing of Cast Films and Tapes
Tad Finnegan, February 2018

Recent Advances in Additives










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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.

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