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.
C.M. Small, G.M. Mc Nally, W.R. Murphy, C-S. Lim, C-Y. Lew, May 2006
Nanocomposite blown films were prepared with blowup ratios from 1.5 to 2.5, by direct compounding with 5% nanoclay and direct let-down of a 25% nanocomposite masterbatch produced by double-stage mixing. Results demonstrated improved clay exfoliation and orientation in films manufactured from masterbatch.
A low cost and practical infrared rapid surface heating system for injection molding is designed and investigated. The temperature increase is verified on the mold plate with a thermal video system. A modified spiral flow mold was used to test the enhancing filling ability of the rapid surface heating system.
The paper describes the possibilities of a new generation of high-speed hotplate welding machines and the first results for the welding of low-viscosity thermoplastics. Possibilities for a new form of quality assurance and also a means of adjusting the optimum process parameters are presented.
Polypropylene (PP) and polysulfone (PSU) have not been previously blended due to viscosity and processing temperature variations. These blends made using an environmentally-friendly process showed structureproperty improvements with the addition of functional polyolefins.
Jiann-Shing Wu, Huan-Chuang Tseng, Rong-Yeu Chang, May 2006
The purpose of this paper is to study the die swell phenomena in a nano-extrudate flow from the molecular dynamics simulation. We have studied a polyethylene (PE) melt extruding into vacuum surrounding through a 4-to-1 nano-extrusion die. The results indicate the extrusion velocity has a strong influence on the stability of extrudate with the die swell. Also, there is a particularly noteworthy surface effect that some molecules are adsorbed on the outer surface of capillary under the lower extrusion velocity.
Effects of surface treatment agent (amino silane, epoxy silane, methacryl silane and vinyl silane) on tensile and bending properties of glass fabric/phenol resin composites were examined. The tensile and bending properties of the composites with epoxy silane treating glass fabrics were higher than that of the other specimens. On the other hand, these properties of the composites with vinyl silane treating glass fabrics were the lowest in all specimens.
Richard J. Farris, Amiya R. Tripathy, William J. MacKnight, May 2006
We have been investigating the synthesis and polymerization of cyclic oligomers of bisphenol A polycarbonates (BPACY), and cyclic ester oligomers (CEO) for a number of different applications. Both the BPACY and the CEO are low viscosity liquids. It is possible to form nanocomposites by liquid-liquid phase separation during polymerization of cyclic oligomers or by adding nanoclay.
Y.W. Leong, S. Yamaguchi, U.S. Ishiaku, H. Hamada, May 2006
Adhesion properties between PC/ABS blend substrate and PC films of various thicknesses, bonded through film insert molding, were investigated. The usage of different Mw of PC and PC-oligomer in the blend has been found to severely affect the adhesion strength and alter the delamination characteristics at the film-substrate interface. Thicker films have also been found to have a profound effect in enhancing the film-substrate adhesion.
P. Dias, A. Hiltner, E. Baer, J. Van Dun, H. Chen, S.P. Chum, May 2006
The solid state structure, mechanical properties, and gas transport of biaxially oriented polypropylenes are investigated. Specifically, the effect of chain architecture on processing conditions and resulting properties of the oriented films is probed. Relationships between the process, solid state structure, and properties are described.
High-temperature high-pressure sintering coupled with thermoforming is a novel process to make shapeable matrix-free polymer composites by consolidating and molding UHMWPE fabric. The process-structure-property relationship was studied to provide a profound understanding of this creative method.
P.E. Poirier, D.J.Y.S. Pagé, N. Cunningham, May 2006
Natural graphite flakes (NGF) were partially oxidized with potassium permanganate (KMnO4) in order to increase their dispersion during melt mixing in polypropylene (PP) grafted maleic anhydride (MA) (PPg- MA). Electrical conductivity of the composite, as well as X-ray diffraction, Fourier transform infrared spectrometry, and rheological properties were assessed against the level of oxidation.
David E. Higbee, Hemina KrishnaBachia, Rajendra K. Krishnaswamy, May 2006
The design and construction of a simple and inexpensive single screw extruder with a transparent quartz barrel is presented. The utility of such an extruder as an effective teaching tool to visually portray the mechanisms of polymer melting and mixing during extrusion is outlined.
The effect of the near-exterior, oriented layer on the mechanical properties and related behavior of plastic injection-molded parts was studied. Standard tensile test specimens were molded from two different melt flow rate variations of Dow Magnum ABS: a 12.0 g/10-min MFR (347EZ), and a 5.0 g/10-min MFR (9555). Four families of specimens were investigated: as molded, as molded then annealed, machined, and machined then annealed. Results showed that very similar reductions in tensile strength occurred when samples were either annealed, or machined.
Aditya Ranade, Anne Hiltner, Eric Baer, Mark Barger, Joseph Dooley, May 2006
Prevention of gas escape during foam sheet extrusion has been a challenge, particularly in the manufacture of elastomer foams. It has been demonstrated for the first time that coextrusion of multiple alternating layers of foam and film is a means to achieve low density elastomer based foam structures. Materials with soft touch and high toughness have been obtained with the appropriate choice of layer structure, constituent materials, and fabrication conditions.
Matthew B. Jackson, Millington Adkins IV, May 2006
The effects of shear induced orientation were studied. IZOD impact tests were performed on a high and low molecular weight Acrylonitrile Butadiene Styrene (ABS) polymer. Oriented samples were compared against unoriented samples to quantify the effects of orientation on impact strength. It was discovered that the outer orientated layers contribute significantly to the impact strength of the molded parts.
A thermal gradient is inherent to the solidification of extruded profiles such as pipes. Depending on the magnitude of the gradient, varying levels of residual stresses are frozen-in during the pipe fabrication step. In this investigation, the residual stress state of a polyethylene (PE) pipe was altered by changing its wall thickness. Creep rupture testing of the subject pipes provided an insight on how residual stresses influences both ductile and brittle fracture processes.
S. Khare, M. Moneke, N. Plachkov, R. Hempelmann, N. Lenz, M. Bureik, May 2006
An approach to develop PE nanocomposite containing Ag nanoparticles to have an antimicrobial effect is presented. PE was compounded with TiO2 decorated with Agnanoparticles. Morphology of the compound, diffusion of Ag ions and antimicrobial properties for different Ag concentrations were investigated.
Kam-Wa D. Lee, Musa R. Kamal, Philip K. Chan, May 2006
A number of studies have considered the effect of temperature on phase separation of polycarbonate (PC)/liquid crystalline polymer (LCP). In this work, the effects of shear on the morphology and phase separation temperatures of the blends at different compositions are studied. A polarized light microscope was used in conjunction with a shear cell to observe the phase separation temperatures and to monitor the development of the phase-separated structures.
B.G. Millar, C. Small, G.M. Mc Nally, W.R. Murphy, May 2006
Cast films were prepared from a range of commercially available conventional and metallocene catalysed linear low-density polyethylenes (LLDPE). Drawdown characteristics were compared to both shear and extensional behaviour of the polymers, which was controlled by molecular characteristics. Minimized neck-in and reduced edge beading can be attributed to polymers with low extensional viscosity and extensional thickening behaviour at low extension rates.
Sungeon Kim, Kazutoshi Umemura, Toshihiro Yoshida, Masaya Kotaki, Hiroyuki Hamada, May 2006
Effect of PC-oligomer content on morphology and mechanical properties including tensile, flexural, izod impact properties of PC/ABS blend injection moldings were investigated. Different content of PC-oligomer up to 20wt% was blended. Strain at break in tensile tests was found to be significantly increased with only 1wt% PC-oligomer.
Kim McLoughlin Senior Research Engineer, Global Materials Science Braskem
A Resin Supplier’s Perspective on Partnerships for the Circular Economy
About the Speaker
Kim drives technology programs at Braskem to develop advanced polyolefins with improved recyclability and sustainability. As Principal Investigator on a REMADE-funded collaboration, Kim leads a diverse industry-academic team that is developing a process to recycle elastomers as secondary feedstock. Kim has a PhD in Chemical Engineering from Cornell. She is an inventor on more than 25 patents and applications for novel polyolefin technologies. Kim is on the Board of Directors of SPE’s Thermoplastic Materials & Foams Division, where she has served as Education Chair and Councilor.
A Resin Supplier’s Perspective on Partnerships for the Circular Economy
About the Speaker
Gamini has a BS and PhD from Purdue University in Materials Engineering and Sustainability. He joined Penn State as a Post Doctorate Scholar in 2020 prior to his professorship appointment. He works closely with PA plastics manufacturers to implement sustainability programs in their plants.
A Resin Supplier’s Perspective on Partnerships for the Circular Economy
About the Speaker
Tom Giovannetti holds a Degree in Mechanical Engineering from The University of Tulsa and for the last 26 years has worked for Chevron Phillips Chemical Company. Tom started his plastics career by designing various injection molded products for the chemical industry including explosion proof plugs and receptacles, panel boards and detonation arrestors for 24 inch pipelines. Tom also holds a patent for design of a polyphenylene sulfide sleeve in a nylon coolant cross-over of an air intake manifold and is a Certified Plastic Technologist through the Society of Plastic Engineers. Tom serves on the Oklahoma Section Board as Councilor, is also the past president of the local Oklahoma SPE Section, and as well serves on the SPE Injection Molding Division board.
Joseph Lawrence, Ph.D. Senior Director and Research Professor University of Toledo
A Resin Supplier’s Perspective on Partnerships for the Circular Economy
About the Speaker
Dr. Joseph Lawrence is a Research Professor and Senior Director of the Polymer Institute and the Center for Materials and Sensor Characterization at the University of Toledo. He is a Chemical Engineer by training and after working in the process industry, he has been engaged in polymers and composites research for 18+ years. In the Polymer Institute he leads research on renewably sourced polymers, plastics recycling, and additive manufacturing. He is also the lead investigator of the Polyesters and Barrier Materials Research Consortium funded by industry. Dr. Lawrence has advised 20 graduate students, mentored 8 staff scientists and several undergraduate students. He is a peer reviewer in several journals, has authored 30+ peer-reviewed publications and serves on the board of the Injection Molding Division of SPE.
Matt Hammernik Northeast Account Manager Hasco America
A Resin Supplier’s Perspective on Partnerships for the Circular Economy
About the Speaker
Matt Hammernik serves as Hasco America’s Northeast Area Account Manager covering the states Michigan, Ohio, Indiana, and Kentucky. He started with Hasco America at the beginning of March 2022. Matt started in the Injection Mold Industry roughly 10 years ago as an estimator quoting injection mold base steel, components and machining. He advanced into outside sales and has been serving molders, mold builders and mold makers for about 7 years.
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How to reference articles from the SPE Library:
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, ISBN: 123-0-1234567-8-9, pp. 000-000.
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.
