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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Anson Wong , Siu N. Leung , Mohammad M. Hasan , Chul B. Park, May 2010
Due to environmental concerns research has been carried out to investigate the feasibility of using inert gases as blowing agents in plastic foaming processes.However the foamability of polypropylene copolymer blown with argon nitrogen and helium has not been reported previously. This paper investigates the nucleating powers of these gases to foam polypropylene copolymer by studying the polymeric foaming processes in situ.
Husein Dibaei Asl , Seyed Ali Monemian , Shahrouz Taranejoo , Mahmood Torabi Angaji, May 2010
Compatibilized polypropylene (PP)/organically modified montmorillonite (OMMT) nanocomposites were prepared via melt intercalation. OMMTs with different gallery spacing were chosen. The effect of OMMT structure on scratch deformation behavior was investigated.Correlations between scratch deformation parameters with mechanical, thermal and melt flow behavior of the nanocomposites were established and discussed.
The effect of annealing on the deformation and fracture behavior of injection molded Poly (lactic acid) (PLA) was investigated. The behavior of as-molded amorphous PLA was changed from brittle to ductile by annealing above Tg (60?øC) for 5 min. On the other hand, the sample annealed above Tcr (re-crystallization temperature) showed brittle fracture.
Obiageli B. Onovo , Andrey Beyle , Christopher C. Ibeh, May 2010
Syntactic foams on epoxy and on vinyl esters were produced and tested. Different types of glass microballoons were used. Samples were tested on compression tension bending fracture toughness and on impact resistance. The influence of the type of microballoons their concentration and the type of polymer matrix properties was studied. Density and morphology studies were used for the control of technology. Results of experiments are compared with different theoretical models used for the properties prediction.
In structural analysis of the product with glass fiber reinforced material, anisotropic characteristics from fiber orientation have great influences on the analysis results. The fiber orientation results from injection molding CAE software are used to consider the effect, but the expense of the software and lack of knowledge for injection molding prevent structural analysis engineers from considering the anisotropic material properties. To simply apply the effects, new technology was developed. In this study, the process adapted and case studies are introduced.
The Pressure-Volume-Temperature (PVT) data for polymer/gas solutions is an important fundamental property in which accurate measurement has not been reported until recently. This paper presents the measured volume swelling of linear and branchedpolypropylene (PP) with CO2 under hightemperature and pressure conditions by using a new PVT measurement apparatus. Comparisons are made between the measured swelling data the Sanchez and Lacombe (SL) and Simha and Somcynsky (SS) equations-of-state (EOS) predicted values.
Gaurav Mediratta , Todd Loehr , Andre Volkers , Chiel Leenders , Jianbo Di , Srinivas Siripurapu, May 2010
Novel and versatile developments in automotive lighting applications demand new material solutions to meet industry requirements. Color stability of a new transparent high heat polycarbonate copolymer under thermal aging has been investigated. The magnitude and rate of color shift have been used to predict the long-term performance of these materials in automobile lens applications. The end use temperatures can be determined based on specific industry requirements.
S. C. Chen, M. Y. Shih, P. H. Lee, J. S. Huang, S. H. Wang, Y. H. Lin, May 2010
Novel styrenic copolymers containing oligo(oxyethylene) groups are designed, synthesized and characterized using different analytical techniques. While they are used as compatibilizers in engineering polymer blend systems they could potentially impart improved flow and surface properties e.g., antistatic, antidust properties.
Polyphosphonates are a new family of polymeric, flame-resistant oligomers and polymers that can be used in demanding applications both as FR additives and stand-alone plastics. Polyphosphonate plastics have the highest LOI of any of the thermoplastic-processable polymers.
These materials are inherently flame retardant and can be used in a broad variety of polymer systems, including thermoplastic and thermosetting. Being both halogen-free and polymeric, polyphosphonates are unique in the area of flame retardants.
A comprehensive description will be provided for ionic aggregates in ionomers for those cations that are strongly segregated (e.g. ionomers neutralized with transition metals). The fundamental structure of aggregates is planar, and the various morphologies that have been seen in TEM and suggested from SAXS data are due to rolling of the planes (e.g. similar to nanotubes) to reduce the number of edge atoms.
The mechanical properties and morphology of polypropylene/ polyamide-6/organoclay nanocomposites were studied. It was shown that the addition of clay improved impact strength and flexural strength but made little effort on tensile strength. Organoclay had influence on crystalline property of PP and PA6 and improved the compatibility of PP/PA6 blends.
Several failures that occurred to plastic products used at the home of the author were selected for study of their fracture surfaces. The failed parts included a bicycle fender a rack for drying sweaters and a magnetic refrigerator clip. All of the failed parts were fabricated from styrenic-based polymers. This paper will focus on connecting the known service conditions of the failed parts to the unique patterns observed on the fracture surfaces.
Ultrasound assisted twin screw extrusion process was developed to disperse carbon nanofibers (CNFs) in a polymer matrix. CNFs were separately added into the melt stage to reduce the breakage of CNFs and to avoid intense stresses in the feed zone. The effect of ultrasound and CNFs loading on die pressure, rheological, mechanical, electrical and morphological properties of liquid crystalline polymer (LCP) filled with 2-20 wt% CNFs was studied.Ultrasonic treatment caused a reduction in die pressure with decrease in electrical percolation threshold value of treated samples.
Metallized films are used extensively in flexible
packaging to supply light moisture and oxygen barrier.
Generally the film is laminated to a printed web to protect
the metal and to add functionality and product
identification information. It is desired that the lamination
bond strength be high and uniform. This study shows that
metallization conditions have an impact on extrusion
lamination bond strengths and highlights the impact of
lamination conditions on metal crazing.
Metallized films are used extensively in flexible packaging to supply light, moisture and oxygen barrier. Generally the film is laminated to a printed web to protect the metal and to add functionality and product identification information. It is desired that the lamination bond strength be high and uniform. This study shows that metallization conditions have an impact on extrusion lamination bond strengths and highlights the impact of lamination conditions on metal crazing.
An experiment was conducted to measure the energy
consumed during extruder runs with two different
polymers (one crystalline and one amorphous), each
utilizing three different screw designs. Energy
contributions from the individual heating zones on the
extruder were measured and analyzed. Also, the energy
consumed by the motor was measured to provide
comparison of the contributions from the heaters and the
motor. Results show value both in analyzing material
behavior and in evaluating screw performance from an
economic and a productivity standpoint.
Kevin Menard , Andrew Salamon , Witold Brostow , Noah Menard , W. Chonkaew , Carmem Pffiefer , Sherman Newman, May 2010
The application of DSC and DMA to photo-initiated
reactions specifically curing and degradations are
discussed. The influence of the light source its duration
and intensity are investigated in regards to the final
properties of the material. The use of Hyper DSC
techniques as well as simultaneous DMA-NIR in the study
of optically cured materials is discussed.
Kevin Menard , Andrew Salamon , Witold Brostow , Noah Menard , W. Chonkaew , Carmem Pffiefer , Sherman Newman, May 2010
The application of DSC and DMA to photo-initiated reactions, specifically curing and degradations, are discussed. The influence of the light source, its duration and intensity are investigated in regards to the final properties of the material. The use of Hyper DSC techniques as well as simultaneous DMA-NIR in the study of optically cured materials is discussed.
Sandeep Manandhar , Nandika D’Souza , Philippe Zimmern, May 2010
The importance of electrospun fibers as tissue
scaffolds has been an area of significant growth. In this
work, we will utilize electrospinning in conjunction with a
biodegradable polymer, Polycaprolactone (PCL) to make
thin fibers. These PCL fibers can be made into a mesh for
tissue scaffolds. Electrospinning utilizes electrostatic
force to draw fibers from solution.
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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