SPE Library
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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Conference Proceedings
EFFECT OF BLEND COMPOSITION OF EPOXIDIZED NATURAL RUBBER AND FLUOROPLASTIC VIA DYNAMIC VULCANIZATION
Tharinee Thamronglerdrit, Rathanawan Magaraphan,, May 2012
This study is purposed to develop a thermoplastic elastomer via dynamic vulcanization made of epoxidized natural rubber (ENR) and poly(vinylidene fluoride) (PVDF). Rubber parts were mixed at room temperature by using two roll mill, then fed in twin screw extruder with thermoplastic parts to occur dynamic vulcanization for pre-cured stage and compression molding for post-cured stage. This research was emphasized on the contents of ENR, PVDF and curing agent including the addition of PLA that affected on the properties of the dynamically vulcanized blends in comparison to the ternary ones. Mechanical properties including tensile strength and hardness were observed. Oil swelling test was studied by using 4 fuel oil types which are gasohol 91, gasohol 95, E20 and E85 at room temperature. It was found that increasing thermoplastic and DBPH contents have enhanced the tensile strength, young’s modulus and oil swelling resistance. Addition of PLA gave similar results as non-additional ones in term of oil swelling resistance.
COMPARATIVE STUDIES ON THE CRYSTALLIZATION BEHAVIOR OF POLY ETHER KETONE (PEK)
Mathew Abraham, Sandeep Kumar, Veena Choudhary, May 2012
The paper describes the crystallization and melting behavior of poly (ether ketone), PEK , prepared by Gharda Chemicals Ltd, India and compared with PEK supplied by Victrex Plc, UK. The routes of synthesis of the two polymers are different. Gharda Chemicals synthesizes PEK using cheap chlorine based monomers whereas Victrex Plc, synthesizes PEK using expensive fluorine based monomers. Crystallization of PEK was studied under non-isothermal conditions with differential scanning calorimetry. Crystallization parameters were evaluated with standard equations and the results were interpreted on the basis of nucleation, crystallisation, and activation energy of crystallization. The behavior of Gharda PEK and Victrex PEK was found to be comparable.
RHEOLOGY AND MELT FRACTURE OF POLY(LACTIDES)
Norhayani Othman, Bashar Jazrawi, Parisa Mehrkhodavandi, Savvas G. Hatzikiriakos,, May 2012
The wall slip and melt fracture behaviour of several commercial polylactides (PLAs) have been investigated. PLAs with molecular weights greater than a certain value were found to slip, with the slip velocity to increase with decrease of molecular weight. The onset of melt fracture for the high molecular weight PLAs was found to occur at around 0.2 to 0.3 MPa, depending on the geometrical characteristics of the dies. Addition of 0.5wt% of a poly(?- caprolactone) (PCL) into the PLA that exhibits melt fracture was found to be effective in eliminating and delaying the onset of melt fracture to higher shear rates.
OSHA’S COMBUSTIBLE DUST NATIONAL EMPHASIS PROGRAM AND COMBUSTIBILITY CHARACTERISTICS TESTING OF PVC RESINS AND PVC DUSTS
Richard Krock, Lawrence Halprin, Peter de la Cruz, May 2012
This paper provides an overview of the current and potential regulation of the hazards of combustible dust (CD) by the Occupational Safety and Health Administration (OSHA) and the influence of National Fire Protection Association (NFPA) standards and U.S. Chemical Safety Board (CSB) investigations on OSHA enforcement and rulemaking activities. This paper also presents the results of recent laboratory testing performed to determine the explosibility and other combustibility characteristics1 of samples of a variety of polyvinyl chloride (PVC) resin grades provided by resin producers. Explosibility testing was performed on samples of PVC dispersion resins, PVC copolymer resins, PVC suspension resins, and PVC dust particles sampled from a baghouse serving a PVC suspension resin production line. All test results fell into Class St 1, described as a weak explosion risk, when evaluated in a 20 liter test chamber. Because PVC resins by themselves do not have a known history of incidents where explosions occurred, this suggested the possibility that the test results from the 20 liter chamber test vessel reflected a false positive (or “overdriven”) situation caused by the ignition of the PVC particles as they passed through the flame of the ignition source rather than through the self-propagating deflagration that represents explosibility. As-received suspension resin samples from producers were retested for explosibility in a 1 cubic meter test chamber and the results indicated no explosion risk, falling into Class St 0. This suggests that, at least for the tested suspension resins, the test results from the 20 liter chamber test vessel reflected a false positive (or “overdriven”) situation and that the samples were not explosible. This paper was prepared for presentation at the SPE ANTEC on April 2, 2012.
TILTING DIE | THE CONVINCING NEW SOLUTION TO CENTRE AN ANNULAR DIE
Heinz Gross, November 2011
A totally new solution was developed to centre the die in regard to the mandrel of an annular die. The tilting technology overcomes most of the drawbacks of the existing conventional centering solutions. The new tilting technology can be easily retrofitted to existing heads for pipes | for blown films and for the extrusion blow molding process. Tilting dies enable to further reduce remaining eccentric thickness differences in the extruded products. So they help to improve the quality of the products while in the same time the cost of the production is reduced.
Failure Analysis of cracking HDPE cartridges. Optimization of Molding process using Dr. Taguchi Method of D.O.E.
S. Fuentes Purroy, November 2011
This paper’s goal is to explain how to achieve the optimum molding conditions that minimize the effect of stress cracking without removing the causes of degradation during service use. Analyzing failure of HDPE caulking cartridges: due to premature initiation of cracking and brittleness at the cartridge wall.
LATENT ACID CATALYSTS FOR THERMOSET PROCESS CONTROL IN ADVANCED COMPOSITES
Graham S. Murray, November 2011
Bac2 has developed a storage stable | molding material | incorporating a latent acid catalyst for the compression molding of advanced composite bipolar plates | key components of fuel cell stacks. The latent acid catalyst technology is used to control the reactivity of phenolic resins and furan bio-resins | by-products from plant sources. The process control imparted using the hydroxylamine based latent catalyst has extended the opportunity to use phenolic and furan binders in wider composite and adhesives applications.
2,5-FURANDICARBOXYLIC ACID; A VERSATILE BUILDING BLOCK FOR A VERY INTERESTING CLASS OF POLYESTERS
Matheus A. Dam | Gert-Jan M. Gruter |, Laszlo Sipos | Ed de Jong | Dirk Den Ouden, November 2011
Avantium is developing a next generation bioplastics based on 2,5-furandicarboxylic acid (FDCA), called “YXY building blocks”, which can be produced on the basis of sugars and other, non-food, carbohydrates. Avantium aims to replace oil-based polyesters (such as PET) with Furanics polyesters (such as PEF) in a wide range of applications, including bottles and carpets.
SILICONE MODIFIED BIOBASED COATINGS FROM SOYBEAN OIL FOR WATER RESISTANT PAPERS
Shilpa Manjure | Guoren Cheng | Dan Graiver | Ramani Narayan, November 2011
The silylation chemistry of biobased vegetable oils using alkoxy silanes has been studied and patented [1]. The objective of this work was to evaluate the application of the newly developed silylated soyabean oil formulation as a water-proof coating on paper. Paper coated with the silylated oil was tested for water resistance by measuring Cobb test. Results showed upto 95% improvement in water-proofing compared to an uncoated, unmodified paper.
NATURAL GAS AS MAIN ENERGY SOURCE FOR POLYMER PLASTICIZING WITH A SPEZIAL DESIGNED HEAT EXCHANGER
Johannes Wortberg | Felix A. Heinzler, November 2011
The plasticizing process is one of the most energy intensive parts in polymer processing. Reducing energy cost is only possible by changing the principle of plasticizing. Therefore a new plasticizing system is developed, based on the primary energy carrier natural gas as main energy source. Natural gas based heaters and a special designed heat exchanger are the key technologies for this project. In addition to the concept, the layout of a demonstrator is described.
A new Concept to Reduce Odor and Emissions in Polyolefin Compounds
Jorg Garlinsky, November 2011
Polyethylene and Polypropylene are the two most used plastics in the world. Continued development in the industry has resulted in this leading position. Due to this progress, plastics are entering more and more applications where standard materials like wood or metal are traditionally used. However polyolefins are known for having undesirable odors and emissions. To combat this, a new BYK additive concept which allows plastics processors to reduce undesirable VOC and odor in their compounding process has been developed.
MATERIAL COST REDUCTION FOR LARGE AREA AUTOMOTIVE COMPONENT MOLDING
Yatish Vasudeo | K.D. Patel | D.P. Sule, November 2011
Automobile industry is introducing many variants for their customers. This puts lot of pressure to plastic molders due to JIT concept. Attempts need to be made to commonize the materials to shorten the delivery time to accommodate JIT concept. These paper attempts to demonstrate speedy deliveries with lower cost of production.
Hydrophobic Thermoplastic Polyurethanes
Anthony Walder | Donald Meltzer | Daphne Robinson, November 2011
Thermoplastic polyurethanes (TPUs) are a class of thermoplastic elastomers (TPEs) that are used in a variety of medical applications (1). TPUs exhibit low temperature flexibility, excellent abrasion resistance, high tensile strength and good processing characteristics. The softest TPUs historically used in medical applications exhibit a Shore Durometer above 70A. A medical grade TPU with a Shore Durometer of 62A will be presented. This softness is achieved without the use of plasticizers as is often the case with many other soft TPEs.
A NEW BETA NUCLEANT MASTERBATCH FOR MINERAL FILLED AND UNFILLED POLYPROPYLENE APPLICATIONS
Philip Jacoby, November 2011
We have developed a unique, highly selective beta nucleant masterbatch that produces high levels of beta crystallinity, and high crystallization temperatures (Tc values). This masterbatch can also be used in polypropylene that already contains other additives which nucleate the alpha crystallinity, such as talc filled PP. The ability to beta nucleate talc filled PP offers the possibility of using beta nucleation to achieve both high stiffness and high impact strength in talc reinforced PP.
A NEW CLOSED LOOP MOLD TEMPERATURE CONTROL TECHNIQUE BY MEANS OF ONLINE THERMOGRAPHY
Georg Schwalme, Martin Bastian, Peter Heidemeyer, SKZ Suddeutsches Kunststoff-Zentrum, Wurzburg, Michael Koch, November 2011
In injection molding, the precise control of the mold temperature distribution is a crucial prerequisite for the quality of the final products. A new approach to achieve an excellent repeat accuracy of the mold temperature is to use infrared images of demolded parts to realize a closed loop control. Without the necessity for changes in the mold the automatic control can help to improve the quality, to keep cycle times short and to avoid scrap.
Hybrid Composite Front Seat Backrest
Thierry Renault | Amit Kulkarni | Kipp Grumm | Prasanna Kondapalli | Scott Schlicker | Jordan Kurikov, November 2011
A car seat backrest was developed by Faurecia and BASF with a new multi-material technology that combines the use of metal, injected polyamide and continuous fiber reinforced thermoplastics. The paper describes the architecture of the seat, the choice of the materials, and the numerical and experimental validation of the structure.
USING DMLS TECHNOLOGY FOR CONFORMAL COOLING IN THERMOPLASTICS INJECTION TOOLS
Pascal Antoine, November 2011
Thermal assets are fundamental in the thermoplastics injection toolings. DMLS (Digital Metal Laser Sintering) is one option to solve problems of injection molding thermal assets using an industrial procedure to introduce conformal cooling in injection tools. Conformal cooling is a special shaped regulation circuitry ideally installed in the injection tools.
A STUDY ON EFFECTS OF VARIOUS PARAMETERS ON COLOURS DURING COMPOUNDING OF PLASTICS
M. Rabbani | J. AlSadi | G. Rizvi | S. Ahmed | D. Ross, November 2011
The historical production data of SABIC IP, Cobourg, was used to determine effects on colours of compounded plastics, of using extruders of different configurations, incorporating minute variations in pigment compositions and using different grades of resins. The colours had been measured in terms of CIE L*,a*,b* values using a spectrophotometer. The measured L*,a*,b* values were then analyzed and compared to the target values using statistical methods. The differences in the observed trends are discussed.
TRENDS AND NEEDS IN AUTOMOTIVE MATCHED BY ECO+ SOLUTIONS FROM DSM
Bert Havenith, November 2011
An overview is given of the various drivers, needs and trends in the automotive industry and how these are matched by various new plastic solutions, which in the end all significantly increase the sustainability of various car components and of the complete cars in total.
HOW INDUCTIVE HEATING CAN IMPROVE PLASTIC INJECTION
José Feigenblum, November 2011
Currently, in the thermoplastic injection industry, there are several processes allowing heat cycling within the mould. Although they have their own characteristics, their purpose is the same. There are many advantages to be taken into consideration whilst injecting hot thermoplastic onto a heated tool, such as: no welding lines, no sink marks, no paint necessary and the possibility to easily inject engineered materials.
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