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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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.
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.
Huiju Liu , Peng Wang , Marino Xanthos , Linjie Zhu , Costas G. Gogos, May 2010
Applying extrusion technology to drug manufacturing received increasing attention in the last two decades. Extrusion technology has the potential of replacing current pharmaceuticals manufacturing methods due to the advantages such as the elimination of solvent and the continuous and consistent high throughput. This article presents a brief review of Hot Melt Extrusion (HME) from polymer processing perspective, concentrating on mixing, material degradation and process analytical technology.
Simulation results for mixing of two different polymers in a co-rotating twin-screw extruder are presented. Velocity distribution predicted by a threedimensional simulation of the flow is used to predict the change in the spatial distribution of initially segregated particles as well as the reduction in radius due to erosion.The predicted particle distribution is used to estimate the increase in Shannon entropy due to dispersive and distributive mixing along the extruder channel.
Amit K. Chaudhary, Krishnamurthy Jayaraman, May 2010
Thermoplastic foams were produced from two different polypropylene nanocomposites by extrusion with the help of a chemical blowing agent. The strain hardening ratio decreased with increasing strain rate for one of the nanocomposites. For the other nanocomposite melt, the strain hardening ratio was unchanged with strain rate. Smaller cell sizes (less than 40 microns in diameter) were obtained when the nanocomposite melt displayed strain hardening levels in extensional flow that were maintained over a range of strain rates.
A new algorithm for simulation of non-isothermal flow in a twin-screw extruder is introduced. In the new algorithm the finite element mesh of tetrahedral elements is created in the complete barrel including the space occupied by the screws. By partitioning the tetrahedral elements which are intersected by the screw surfaces into two tetrahedral pyramidal or prismatic finite elements the new algorithm allows the flow simulation in twinscrew extruder without regenerating the finite element mesh as the two screws rotate.
Makoto Seino , Manabu Nomura , Masaya Kotaki, May 2010
Flammability of frame retardant polypropylene
(FR-PP) based sandwich injection moldings was
investigated. Flame-retardant and filler were
intentionally incorporated in the skin and the core
parts of sandwich injection moldings. Sandwich
injection moldings showed superior flame
retardancy and mechanical properties when high
contents of flame-retardant and filler were
incorporated in the skin and the core parts
respectively. This trend was remarkable when
phosphorous flame-retardant (Intumescent) was
used compared to bromine flame-retardant.
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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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