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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Various topics related to sustainability in plastics, including bio-related, environmental issues, green, recycling, renewal, re-use and sustainability.
Dow Automotive & Magna/Decoma International, September 2008
There are many formative trends in today’s OEM composite marketplace which are driving the investigation and development of alternative feedstocks from natural or renewable resources in the plastics industry such as environmental sustainability reduced dependence on crude oil and the high cost of petroleum-based derivatives. This paper will describe the development of a novel soy oil based polyol (under the RENUVA™tradename) which has technological advantages in terms of odour physical properties compatibility and processability in polyurethane application over existing soy-based polyol. The paper will further describe the development partnership undertaken by The Dow Chemical Company and Polycon Industries (a division of Magna International) to utilize this “green” polyol to develop a Reaction Injection Moulded (RIM) polyurethane formulation suitable for painted exterior applications. The paper will outline the development aliterations done to accomplish this goal and to maximize the soy-based polyol content in the RIM composite for physical property and processability optimization. The paper’s conclusion will demonstrate the viability of a 50% soy-based polyol solution to meet the processability paintability and physical property specification of a current Original Equipment Manufacturer (OEM) RIM program through direct comparison of extensive trial work done on series production fascia tooling at Polycon. The paper will extend this development work into potential opportunities for the RIM polymer involving exterior composite applications for heavy equipment or agricultural machinery where natural resource feedstocks would have clear market desirability.
This paper describes a plastics education program for middle school girls. The goals of the program were to expose the girls to science and engineering and to educate them about plastics. The program included an overview of plastics and hands-on experimental investigations. Experiments included making a polymer environmental issues and the structure and properties of polymers. In addition to giving detailed descriptions of the program this paper includes recommendations for further improvements of the program.
María del Pilar Noriega , Juan Diego Sierra, May 2008
A prospective study on flexible plastic packaging was carried out in Andean Countries with the participation of two plastic research institutes and 20 companies including raw material manufacturers processors converters and end users.The inputs of this prospective study were a review of the state of the art on flexible packaging a benchmarking study considering the 10 most important companies a study using the Delphi method with national and international experts who identified the key variables to the development and progress of the flexible packaging in the region and workshops.This study generated new projects and products on the field of barrier smart and active packaging biodegradable materials among others; it shows that the Andean region is applying R&D and technological alliances in its industrial processes.
With growing concern regarding our environmental
impact greater focus has been placed on ways we can
reduce our impact by improving our decisions designs
and processes. The use of injection molding simulation
has been shown to reduce material consumption reduce
production scrap assist in recycling existing materials
create better quality products that have a prolonged life
and reduce energy consumption required during the
manufacturing process. This paper will present the
benefits of an additional measure called an Energy Usage
Indicator that can assist part designers using injection
molding simulation to easily identify the processing
requirements of a polymer material.
With growing concern regarding our environmental impact, greater focus has been placed on ways we can reduce our impact by improving our decisions, designs and processes. The use of injection molding simulation has been shown to reduce material consumption, reduce production scrap, assist in recycling existing materials, create better quality products that have a prolonged life and reduce energy consumption required during the manufacturing process. This paper will present the benefits of an additional measure, called an Energy Usage Indicator, that can assist part designers using injection molding simulation to easily identify the processing requirements of a polymer material.
Premature cracks were observed during service in the
slide valve assembly molded from an acrylonitilebutadiene-
styrene resin. The investigation focused on the
determination of nature and cause of the failure. The
results obtained during the evaluation indicated that the
failure was due to environmental stress cracking which
occurred as a consequence of the presence of the residual
stress and the stress cracking agent. This paper will focus
on the testing used to characterize the failure mode and
identify the cause of the cracking of the slide valve
assembly.
Premature cracks were observed during service in the slide valve assembly molded from an acrylonitilebutadiene- styrene resin. The investigation focused on the determination of nature and cause of the failure. The results obtained during the evaluation indicated that the failure was due to environmental stress cracking, which occurred as a consequence of the presence of the residual stress and the stress cracking agent. This paper will focus on the testing used to characterize the failure mode and identify the cause of the cracking of the slide valve assembly.
The effects of a bioactive [Nalidixic Acid - NA] and copolymers [Poly L-Lactic Acid (PLLA) and Polyethylene Glycol (PEG)] on the drug release morphology and mechanical properties of Poly -caprolactone [PCL] were studied. Release of NA increased with the addition of copolymers in the PCL with a maximum release of 55% in a blend containing 5%w/w each of PLLA PEG and NA. The filler effect of the NA was illustrated by an increase in viscosity in the blends. FTIR spectrums showed the blending of the PCL and the NA. The carbonyl bond present in the biodegradable polymers PCL and PEG allowed for some degree of miscibility also confirmed by the decrease in thermal conductivity from 0.26 to 0.2 Wm'C. Mechanical properties were decreased by the copolymers with the Young's Modulus decreasing by 15%.
Blend films of acrylic acid grafted polycaprolactone
(PCLgAA) and chitosan (CS) with different
compositions were prepared from aqueous acetic acid
solution. DSC measurements showed that the melting
temperatures and enthalpies of the blends decreased
with increasing CS content. From FTIR results it can
be seen that the amino groups of CS form covalent
bonds with the carboxylic groups of PCLgAA in
addition to hydrogen bonds between these components
in the blends. Though the crystal structure of the
PCLgAA component was not changed as proved by
WAXD results blending CS suppressed the
crystallinity of the blends. Furthermore the ductility
of CS was increased during tensile testing in
PCLgAA/CS blends due to enhanced affinity between
the two components. However PCLgAA/CS blends
showed greater resistance than PCL/CS blends to
biodegradation in an enzymatic environment.
Blend films of acrylic acid grafted polycaprolactone (PCLgAA) and chitosan (CS) with different compositions were prepared from aqueous acetic acid solution. DSC measurements showed that the melting temperatures and enthalpies of the blends decreased with increasing CS content. From FTIR results it can be seen that the amino groups of CS form covalent bonds with the carboxylic groups of PCLgAA in addition to hydrogen bonds between these components in the blends. Though the crystal structure of the PCLgAA component was not changed, as proved by WAXD results, blending CS suppressed the crystallinity of the blends. Furthermore, the ductility of CS was increased during tensile testing in PCLgAA/CS blends due to enhanced affinity between the two components. However, PCLgAA/CS blends showed greater resistance than PCL/CS blends to biodegradation in an enzymatic environment.
This paper presents the development and characterization
of the antimicrobial activity of a novel family of
commercial food contact compliant silver-modified
nanolayered clays and of their nanobiocomposites with
polylactic acid. The antimicrobial nanolayered clays
showed an antimicrobial effectiveness of 99.99% against
Gram-negative Salmonella spp. In addition the PLA-clay
nanocomposite also showed a significant antimicrobial
activity and a synergistic water vapour permeability
reduction of 32% with respect to neat PLA. The results
indicate that these novel active nanolayered fillers can
potentially exhibit numerous applications in plastic and
bioplastic packaging and coatings where simultaneous
barrier and antimicrobial performance are desirable.
This paper presents the development and characterization of the antimicrobial activity of a novel family of commercial food contact compliant silver-modified nanolayered clays and of their nanobiocomposites with polylactic acid. The antimicrobial nanolayered clays showed an antimicrobial effectiveness of 99.99% against Gram-negative Salmonella spp. In addition, the PLA-clay nanocomposite also showed a significant antimicrobial activity and a synergistic water vapour permeability reduction of 32% with respect to neat PLA. The results indicate that these novel active nanolayered fillers can potentially exhibit numerous applications in plastic and bioplastic packaging and coatings where simultaneous barrier and antimicrobial performance are desirable.
The family of biobased polymers is ever growing in
number and in popularity and the extruder/screw
manufacturing businesses need to keep abreast of the
machinery requirements of these polymers to insure that
efficient processing is understood. This paper will look at
the extrusion parameters and logic that are important to
determining the most efficient screw designs and
extrusion operating conditions for processing
biopolymers. Vented and non-vented operation will be
discussed. PLA data will be used as the basis for the
conclusions.
The family of biobased polymers is ever growing in number and in popularity and the extruder/screw manufacturing businesses need to keep abreast of the machinery requirements of these polymers to insure that efficient processing is understood. This paper will look at the extrusion parameters and logic that are important to determining the most efficient screw designs and extrusion operating conditions for processing biopolymers. Vented and non-vented operation will be discussed. PLA data will be used as the basis for the conclusions.
The effect of concentration of Igepal CO 630 on slow crack propagation in MDPE pipe was investigated. The kinetics and mechanism of crack propagation in fatigue at R=0.1 and creep at 50 ?øC were compared to those in air. The fatigue and creep behavior followed the same stepwise crack growth mechanism as in air at all the concentrations used. As the concentration increased to 0.01 vol. % the creep lifetime decreased significantly whereas the lifetime in fatigue gradually increased. At higher concentrations the lifetime was similar in creep and fatigue.
Andres Garcia , Patricia Alvarado , Maria Sibaja , Guillermo Jimenez , Jose Vega, May 2008
Rigid polyurethane (PU) foams were prepared by a multi- step procedure using a polyol blend of poly(ethylenglycol) PEG-200/pineapple molasses and 4 4'-diisophenylmethane diisocyanate (MDI) with a NCO/OH ratio of 1.2. Such material was reinforced with fibers from banana rachis with a fiber composition ranging from 18% to 40% wt.Thermal and themooxidative degradation properties of these composites were assessed. Thermal degradation of PU60 showed the highest polymer lifetime values.
The importance of three inter-dependent factors, i.e., (1) materials, (2) manufacturing, and (3) design and engineering, is generally recognized. All factors are indispensable and equally important for product development. Manufacturing is often the least structured factor and many designers and materials experts do not consider themselves capable to deal with it. Fortunately, expertise is sufficiently available and the best professionals are able to utilize plastics expertise properly in collaborative product development.
David Grewell , Gowrishankar Srinivasan , Maria Baboi, May 2008
Recently, an increase in the demand for ethanol as
a fuel additive has resulted in a dramatic increase in its coproducts
namely distiller’s dried grains with solubles
(DDGS).
This work studied a composite of DDGS and
conventional petrochemical plastics (polyvinyl chloride)
for applications in windows construction. The goal was to
characterize the composite and its processibility for
“green” plastics. The experiments showed that DDGS can
be effectively extruded with PVC; at low filler levels (5-
10%) of DDGs strengthening of the PVC was seen.
However, higher filler levels (>10%) of DDGS degraded
the mechanical properties of PVC/DDGS composites.
Also, ground DDGS perform better as reinforcement
agents compared to standard DDGS. Caustic pretreatment
was also studied and it was found not to effect the
mechanical properties significantly. Also, the addition of
PVA had little effect on the properties of the composite.
Marina Rogunova , Jim Mason , Robyn Francis, May 2008
Automotive original equipment manufacturers are consistently looking for low-gloss materials for interior applications that can stand up to years of wear and tear and environmental exposure yet maintain aesthetic quality without painting. Bayblend?? LGX 300 resin is specifically developed for automotive interior applications requiring a material that is inherently low in gloss with extra flowability, good weathering and good scratch and mar resistance. Another important attribute of Bayblend LGX 300 is its low-emission characteristic, which is particularly important as automotive manufacturers strive to reduce the levels of VOCs in their automobiles to improve the interior environment and meet federal regulations. Because LGX 300 resin is a low gloss, high-flow polycarbonate (PC) blend with good heat and impact performance; thin-wall part design can be achieved without painting.
Marina Rogunova , Jim Mason , Robyn Francis, May 2008
Automotive original equipment manufacturers are
consistently looking for low-gloss materials for interior
applications that can stand up to years of wear and tear and
environmental exposure yet maintain aesthetic quality
without painting. Bayblend® LGX 300 resin is specifically
developed for automotive interior applications requiring a
material that is inherently low in gloss with extra
flowability good weathering and good scratch and mar
resistance. Another important attribute of Bayblend LGX
300 is its low-emission characteristic which is particularly
important as automotive manufacturers strive to reduce the
levels of VOCs in their automobiles to improve the interior
environment and meet federal regulations. Because LGX
300 resin is a low gloss high-flow polycarbonate (PC)
blend with good heat and impact performance; thin-wall
part design can be achieved without painting.
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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