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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Gowri Dorairaju, Gregory Morose, Daniel F. Schmidt, May 2010
Fiber-reinforced polypropylene (PP) composites represent an attractive solution for industries to produce tailor-made materials. Poly-ethylene terephthalate (PET) fibers are chosen in this work. PET fibers are cable-wired by using a PP matrix and the final composites show good balance between high impact properties, even at very low temperatures, improved stiffness and fracture strain. The effects of fiber concentration, types of PP matrices, types and concentrations of dispersing agents are investigated.
The affects on the mechanical and rheological properties of blends of recycled blown film (BM) and injection moulded milk containers (IM) were studied. Tensile, flexural and thermal properties remained unchanged with resultant increasing MFI. Anomalous results appear to occur between the 80/20% w/w (BM/IM) and 60/40% w/w (BM/IM) blends as confirmed by GPC, MFI and density.
M. Zatloukal , K. Chaloupkova , M. Martyn , P. Coates, May 2010
In this work the relationship between die exit geometry and die drool phenomenon for metallocene based LLDPE has been investigated experimentally by using laboratory extrusion line equipped by specially designed capillary die and flow visualization cell as well as theoretically by using viscoelastic Finite Element Method.
The factor of safety (FOS) is a key design parameter for
any part subjected to stress. FOS is of special interest
when a plastic part is designed because of the highly
variable plastic properties. Several experimental tests were
conducted to end-user parts manufactured with HDPE PP
and PVC which were exposed to different kind of loads
until part failure. Mechanical simulations considering a
linear material behavior were performed under the same
loads and restraints conditions employed in the
experimental tests in order to determine the proper FOS
to be considered.
The factor of safety (FOS) is a key design parameter for any part subjected to stress. FOS is of special interest when a plastic part is designed because of the highly variable plastic properties. Several experimental tests were conducted to end-user parts, manufactured with HDPE, PP and PVC, which were exposed to different kind of loads until part failure. Mechanical simulations considering a linear material behavior were performed under the same loads and restraints conditions employed in the experimental tests, in order to determine the proper FOS to be considered.
S.B. Tan , P.R. Hornsby , M. McAfee , M.P. Kearns , M. McCourt , P.R. Hanna, May 2010
Internal cooling is an attractive way to reduce the cycle times and enhance the product properties in rotational moulding. A review on the different internal cooling approaches undertaken by various researchers in the past is presented. Internal water spray cooling is considered as an alternative cooling technique and the important process parameters for this technique are highlighted. These parameters are believed to affect the cooling efficiency and product quality when internal water spray cooling is applied.
Andrew W. Salamon , Peng Ye , Kevin Menard, May 2010
Ethernet instrument communications with an
intuitive user interface easily manages an academic
laboratory environment. Controlling a thermal
analytical instrument whether it is a DSC TGA or a
STA is simply a one touch interaction. Students quickly
learn method setup and data analysis. A rainbow of
colors and line types makes it is easy to compare and
contrast curves. Polymer glass transitions and
endothermic and exothermic graphical events are easily
included in reports.
Andrew W. Salamon , Peng Ye , Kevin Menard, May 2010
Ethernet instrument communications with an intuitive user interface easily manages an academic laboratory environment. Controlling a thermal analytical instrument, whether it is a DSC, TGA, or a STA, is simply a one touch interaction. Students quickly learn method setup and data analysis. A rainbow of colors and line types makes it is easy to compare and contrast curves. Polymer glass transitions and endothermic and exothermic graphical events are easily included in reports.
Ashish Batra , Lisa Madenjian , Wenbin Liang , Gary Marchand , Dan Moldovan , Jacob Jones, May 2010
INFUSE' Olefin Block Copolymers (OBCs) are a family of new materials which are finding increasing utility in soft compounds that have traditionally been dominated by Styrenic Block Copolymers (SBCs). In this paper we will elucidate the fundamental differences in processing OBCs and SBCs to achieve low Shore A products. Comparisons of similar Shore A compounds show that OBC soft compounds can achieve the performance of traditional SBC-based compounds based on mechanical property comparisons.
Sean T. Flowers, Avraham Benatar, George W. Ritter, May 2010
A cyclic olefin copolymer (COC) was investigated as a superior water vapor barrier material for possible use in multilayer, high barrier packaging structures for military rations. The COC was processed via cast film extrusion, while chill roll temperatures and take-off speeds were varied, to determine the effects on the barrier properties and transmittance of the films. Characterization of the cast films included, water vapor permeation testing, ultraviolet-visible spectroscopy and differential scanning calorimetry (DSC).
Sean T. Flowers , Avraham Benatar , George W. Ritter, May 2010
The ultrasonic weldability of high-density polyethylene (HDPE) nanocomposites was investigated using four different energy director butt joint designs with loadings of 0 3 and 6 wt% nanoclay. Patterned surfaces were incorporated in an attempt to allow nanoclay platelet alignment on multiple planes inside the weld region.Samples were welded using a one-factor-at-a-time approach varying weld time weld amplitude and weld force. Weld tensile strengths were compared for the different clay contents and joint patterns.
Charlie Y. Lin, Bruce A. Harrington, David B. Dunaway, May 2010
A polyetherimide (PEI, ULTEM* 1000 resin) and polyetheretherketone (PEEK) form a miscible blend that has been well studied. Blends of PEEK with other polyetherimides and polyimides were evaluated to determine miscibility. The effect of extent of miscibility on crystallization of PEEK is also assessed. Potential blends with a range of properties are presented.
Amit S. Kulkarni , Parminder Agarwal , Jim DeRudder , Karin van de Wetering , Ying Li , Jenny Zhang, May 2010
The latest applications in automotive and
computer & business equipment markets require a
high modulus resin coupled with superior impact
behavior. It is a challenge to deliver these new
features in products coupled with other desirable
properties such as low thermal expansion and
optimal melt-flow that enables filling of complex
parts. This manuscript details the development of
new PC/ABS blends based on novel filler
technology to deliver these market needs.
Polypropylene (PP)/polysulfone (PSU) membranes were successfully made using an environmentally-friendly process. Flux amongst other mechanical properties were improved with the introduction of functional polyolefins.Understanding the chemistry and location of the functional polyolefins is critical to explaining these improvements.
Polypropylene (PP)/polysulfone (PSU) membranes were
successfully made using an environmentally-friendly
process. Flux amongst other mechanical properties, were
improved with the introduction of functional polyolefins.
Understanding the chemistry and location of the
functional polyolefins is critical to explaining these
improvements.
The optimal tooling and processing methods for a thermoplastic vulcanizate (TPV) have been investigated for a corner mold. Using TPVs has become a cost effective solution to replace thermoset rubber specifically ethylene propylene diene monomer (EPDM) rubber. Due to mold complexity and processing inconsistencies molders have tried varying the number and location of gates to achieve success. Using three-dimensional (3D) simulation software results indicate that one gate should be adequate for corner molding with TPVs.
Recently it has been shown that the morphology of nanotubes plays a critical role in determining their behavior in vivo. The purpose of the current work is to
utilize anodized aluminum oxide (AAO) templates to
fabricate polystyrene nanostructures. The effects of
molecular weight, concentration, template pore size and
solvent on the resulting morphology have been
characterized. Results indicate complete filling of
homemade templates was achieved with 1wt% polymer
solutions of when Mn > Me.
This paper introduces the concept of improving blown
film yield by reducing excess resin being used to cover
chronic gauge problems and manual width control
methods. The term runaway resin is introduced and
quantified for manual width control. A case study is
presented that demonstrates reductions in runaway resin
and yield improvement by adding an easy to install width
control system to a basic 405mm die (without internal
bubble cooling) running commodity products.
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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