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.
Various topics related to sustainability in plastics, including bio-related, environmental issues, green, recycling, renewal, re-use and sustainability.
Fiber glass reinforced engineering plastics are increasingly important construction materials in transportation, electrical and other field applications. With the use of fiber glass reinforcements, certain material properties such as stiffness, strength and temperature stability are significantly improved. Combined with the base plastics, attractive material properties are obtained making them suitable for very demanding applications. Traditional performance attributes such as mechanical and environmental properties, reductions in total part cost as well as lightweight benefits allow these materials to provide answers to more complex applications, while meeting lightweight, recyclability, food contact and other requirements. It is essential to use the right fiber glass product with the right sizing specific to the application. Sizing provides a powerful solution for many processes and performance attributes of short fiber compounds and allows the final product to meet a variety of additional requirements. In this paper, the latest developments in glass fiber reinforcement will be reviewed, focusing on some of the most important engineering plastics such as polyamide, polyester and others. It will be demonstrated how very small amounts of glass fiber sizing can be very effective in realizing performance attributes over a wide range of requirements. In addition, examples will show how glass fiber reinforcements can greatly enhance the performance of certain biopolymers.
Moinuddin Sarker, Mohammad Mamunor Rashid, Sadikur Rahman, May 2012
Waste plastics usages are increasing all over the world every day. People are consuming plastics in their daily life for all necessary purposes. After they are used all plastic become garbage and its goes to land fill or incineration facilities. It’s creating environmental problem. Waste plastic can be transform into alternate or renewable energy for electricity or feedstock refinery. The thermal degradation process applied with mixture waste plastics of high density polyethylene (HDPE-2), low density polyethylene (LDPE-4), Polypropylene (PP-5) and Polystyrene (PS-6) using stainless steel reactor has been successful in converting into liquid fuel. The polymer has been selected for the experiment 100% HDPE, LDPE, PP and PS by weight. The temperature used for degradation ranges from 150-400 °C and the experiment takes about was 5 -6 hours. The obtain products are liquid fuel, light gas and black carbon residue. Various techniques such as, (Gas Chromatography and Mass Spectrometer, FT-IR and DSC) are used for obtain the analysis of the fuel purposed. GC/MS result indicates hydrocarbon compound in the produced fuel ranges from C3-C28 and also present C1-C4 light gases. Also further fractional distillation process was used to obtain different 5 (Gasoline, Naphtha, Aviation, Diesel and Fuel Oil) category liquid fuel by using different temperature profiles. All of the fraction fuels have different carbon range and contain long chain hydrocarbon like alkane and alkene and some aromatic compound.
Tahereh Mousavand, Maryam Dini Pierre J. Carreau, Pascal Hubert, Musa R. Kamal, May 2012
Depolymerization of PET to high molecular weight oligomers could introduce opportunities to re-use PET waste via chemical recycling. Hydrolysis of PET in the presence of water/steam was carried out in a twin screw extruder, at barrel temperatures of 265°C and 300°C with screw speeds of 20, 60 and 200 rpm. The extruded products were characterized to determine intrinsic viscosity (IV) of samples as well as thermal properties (DSC) and rheological behavior. Proton nuclear magnetic resonance (HNMR) analysis was used to estimate carboxyl end group content. The results showed that the average molecular weight (Mw) of extruded polymer was reduced to less than 10,000 g/mol
Amar Mohanty, S. Vivekanandhan, Nima Zarrinbakhsh, Manjusri Misra, May 2012
Ever increasing energy demands, instability and uncertainty of petroleum/fossil fuel sources, and concern over global climate change have led to resurgence in the development of alternative energy that can replace fossil transportation fuel. Biomass conversion into biofuels, results a huge amount of residues or downstream products called as co-products such as distillers’ dried grains with solubles (DDGS), protein meals, crude glycerol, hemicellulose and lignin. As the production of biofuel continues to grow, surplus amounts of co-products become a critical issue and new value addition is needed for their effective utilization. A successful biorefinery begins with the productive usage of all components of biological feedstocks for value-added fuels, chemicals or materials that parallels the traditionall approach used in “petro-refineries”. Still biorefienry is risky investment, with respect to commercial benefits and finding value added uses for their co-products creates economic returns and lead to their sustainability. Thus present articles summaries the prospects of improved utilization of co-products from biofuel industries for new industrial applications.
The advent of piezo-based digital decorating enables marketers to deliver variable data, high impact graphics, and micro-targeted marketing with a single technology. Date coding, lot coding and traceability- back to the product’s origin- are now possible, enabling companies to satisfy increasingly stringent FDA requirements. And with no changeovers needed, marketers can economically create regional or store-level campaigns, delivering unique messages to minute market segments. Those messages are certain to pack a punch with near photographic quality images. Better yet, direct-to- package printing improves sustainability by eliminating labels, films and other consumable materials.
This research work explores the feasibility of ultrasonics to recycle lactic acid by depolymerizing. Post consumer PLA chopped up to 1mm2 was exposed to high power ultrasonics with water or methanol as the suspension media. The treatments were carried out in the presence of organic and ionic salts of alkali metals such a potassium carbonate and zinc chloride as the catalysts. The treatments were replicated by replacing ultrasonics with Hot water bath as the energy source. Analysis with HPLC indicated PLA to Lactic acid conversion was achieved with yields up to 90% utilizing ultrasonics. Energy calculations indicated that Ultrasonics used 30% less energy to achieve the same yield levels as achieve with hot bath technique
The causes of a drastic reduction in the service life of plastic enclosures molded from an acrylonitrilebutadiene- styrene (ABS) resin have been investigated. The mechanism and type of failure have been deduced from a detailed morphological examination of the fracture surface. Various factors responsible for a rapid failure of the enclosure have been identified. Analytical testing such as infrared spectroscopy and differential scanning calorimetry were performed to identify a specific material characteristic responsible for 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 an incompatible chemical and assembly stress. The nature of the chemical agent was found and its effect on the properties of the ABS is discussed.
Jo Ann Ratto, Jeanne Lucciarini, Gregory Pigeon, Danielle Froio, Sarah Schirmer Cheney, Christopher Thellen, Darin Vanderwalker, Ron Walling, Greg Geil
and
Scott Winroth, May 2012
Layer multiplying coextrusion was utilized to produce a films containing polylactic acid and polyvinyl alcohol for food packaging applications. Control films and films containing 9, 25, 73 and 145 layers were produced. The emphasis of this study was to investigate the processability, morphology, barrier, mechanical and biodegradability properties of these multilayer films. The films showed stable layers, high oxygen barrier and mechanical performance that could all potentially be used in a food packaging applications.
Paul J. Gramann, Javier Cruz, Jeffrey A. Jansen, May 2012
Lifetime prediction of plastics is a very difficult proposition, but one that is becoming increasingly important as plastics are used in more demanding and critical applications. The lifetime of a plastic part is influenced greatly by many factors including the type of plastic, stress level, temperature, type of loading, and environmental conditions. All these factors make absolute lifetime prediction a nearly impossible task. However, by understanding how these factors influence plastics over time, one can begin to make educated predictions with some level of accuracy. This paper will discuss techniques that can be used to predict the lifetime of a part. A case study is given on how lifetime prediction was used to understand and ultimately solve the cracking of an industrial fan made of glass reinforced polypropylene
Maren Bengs, H.J. Endres, A. Siebert-Raths, May 2012
In the last three years the production capacities of biopolymers increased threefold. The current trend in the development of biopolymers is towards bio-based and durable materials, it veers away from biodegradable and compostable materials. As a result of this change and the significant growing market there is a bottleneck regarding the availability of information and technical data of biopolymers. The biopolymer database offers a knowledge platform about biopolymers with producer data and newly measured comparable properties. The presented comprehensive database reflects the market situation and serves as connection between manufacturers, converters and end users.
Indah Widiastuti, Igor Sbarski, S. Masood, May 2012
In this article, numerical modeling is used to simulate the distribution of liquid diffusion in bioplastic material and to determine the hygroscopic stress. The material used is homogeneous PLA based plastic exposed to aggressive automotive liquid. An analytical one-dimensional liquid diffusion solution is also presented to consider liquid concentration distribution, which shows a remarkable agreement with numerical simulation results. The results display non-mechanical stress distribution inside the homogenous material due to non-uniform liquid concentration profile.
PBS/PLA blends in various blend ratios added GMA to modify their compatibility were prepared using melt blending. Mechanical properties of polymer blends before and after in-situ compatibilization were investigated. Morphology and compatibility of modified blends was studied via SEM and DSC, respectively. PBS/PLA 50:50 wt% added 10 wt% GMA exhibited high percentage of elongation at break in a range of LDPE due to co-continuous structures. This phenomenon also benefited the impact strength of modified blends.
Sheng-Ju Liao, Shihn-Juh Liou, Chih-Jen Chang, May 2012
Mold flow analysis of mobile phone case was used in this study to evaluate the intrinsic characteristics of biomass materials how to influence the parameters of injection mold process and the outward appearance of product. Two materials were selected, one is TPS/(PC/ABS) biomass-based material developed by ITRI, and the other is commercial petrochemical plastic PC/ABS. In addition to evaluate the difference between these two materials in the injection mold process and dimensional stability, carbon emissions during this injection mold process were also calculated. Above results will show advantages and shortcomings of this newly developed TPS/(PC/ABS) biomass-based material.
Ebrahim Jalili Dil, Pierre Carreau, Sepehr Ravati, Basil Favis, May 2012
In this work the detailed morphology of poly(lactic acid)/ poly (butylene adipate-co-terephthalate) has been carried out for the first time. The morphology of PLA/PBAT blends with different compositions was studied and limits of the co-continuity region were determined using rheological measurements and image analysis. Particle size analysis and breaking thread experiments showed that PLA/PBAT is a very low interfacial tension polymer blend. Moreover, composites of PLA/PBAT/spherical silica particles were prepared and the localization of silica particles in this blend was studied.
Sepehr Ravati, Christine Beaulieu, Louise Deschênes, Viêt Cao, Basil Favis, May 2012
Polylactic acid (PLA) and polyhydroxybutyrate (PHB) are two of the most important polymers derived from renewable resources. In this work, the morphology and physical properties of binary blends of PLA/PHB and multi-component blends of PLA/PHB with other commodity polymers such as polystyrene (PS) or biodegradable polymers such as polycaprolactone (PCL), poly (butylene succinate) (PBS), and poly(butylene adipate-co-terephthalate)(PBAT) were examined. Completely biodegradable blends of PLA/PHB/PBAT/PCL and PLA/PHB/PBAT/PBS demonstrated some unique morphologies including triple percolated systems.
PBS (Poly(butylene succinate)) is a promising emerging bioplastic with good strength and modulus, however, its elongation at break (EB) is quite low and blends with higher EB materials are a potential route to develop more balanced properties. Blends of PBS with biodegradable polymers including polycaprolactone (PCL), poly(butylene adipate-co-terephthalate) (PBAT), and poly(lactic acid) (PLA) were studied. These blends result in fully-biodegradable blends with completely different thermodynamically stable wetting behaviors and hence, significantly different potential morphological states.
Yottha Srithep, Lih-Sheng Turng, Ronald Sabo, Craig Clemons, May 2012
Polyvinyl alcohol (PVOH) was mixed with a nanofibrillated cellulose (NFC) fiber suspension in water followed by casting. The transmission electron scanning (TEM) images revealed that the NFC fibers dispersed well in PVOH. The presence of NFC significantly increased the tensile modulus of the nanocomposites nearly threefold and could serve as a nucleating agent, promoting the early onset of crystallization. However, at a higher NFC content, it led to greater thermal degradation of the PVOH matrix.
Jason Zhu, Jing Liu, Patricia Hubbard, Roger Avakian, May 2012
The use of polylactic acid (PLA) in durable applications such as appliances and computers has been limited by PLA’s inherent property shortcomings, such as low impact strength, low heat distortion temperature, and lack of flame retardancy. These issues have been overcome via blending with engineering plastics, applying new compatibilization technology and using unique flame retardant additives. The resultant compositions have an excellent balance between heat resistance, impact resistance and flame retardancy. One such composition achieves a UL 94 rating of V-0 at 1.6 mm thickness, a notched Izod impact value at room temperature up to 11.6 ft-lbs/in and also exceeds a threshold of 100°C in heat distortion temperature (HDT) at 66 psi load. This bio-derived blend with >30% bio-content has exceptional properties and has taken PLA into the realm of engineering plastics. These enhancements will enable PLA to replace petrochemical- based materials in many demanding durable applications.
Jason T. Eich, Eileen Weber, Phil Abell, Kristy Wagner, Chris Mack, May 2012
Environmental concerns with traditional chrome plating continue to expand. Parts finishers worldwide are searching for alternative that provides the visual appearance and durability of chrome plate, but without the environmental side effects and costs associated with this decades old process. “Chrome look” processes and coatings for decorative and automotive lighting PVD applications have been used in the UV curable coating industry for over twenty years. As development of UV curable coatings for PVD has progressed, so has the understanding of the PVD process and its unique capabilities and applications. This paper will address the current chrome plating process, advantages of PVD as chrome alternative, challenges associated with the various steps and layers of PVD applications, and suggestions for successful implementation of UV/PVD systems.
This work highlights three decades of polyester resin development for the extrusion blow molding (EBM) process. The optimal formulation for a clear EBM material must fulfill three main requirements: process efficiently on existing equipment, produce bottles with robust drop impact performance, and have an acceptable recyclability story. Balancing these criteria in a single formulation is challenging, since obtaining compatibility in the PET recycle stream inherently causes drawbacks to processing and bottle performance. Nevertheless, significant innovation has enabled Eastman to provide the market with a comprehensive portfolio of copolyester technology, suitable for a variety of needs.
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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