8:00 am – 11:30 am:
T9-Polymer Modifiers and Additives
(Moderator: Robert Sherman)-Room S320G
8:00 am – 8:30 am:
KEYNOTE: Stress-induced crystallization in Polypropylene
Pierre Donaldson, Manager, R&D, Flint Hills Resources
Conventional method to induce crystallization in Polypropylene is the use of external nucleators such as Sodium Benzoate and other organic salts. Several recent studies have also shown the phenomenon of flow-induced crystallization in absence of an external nucleator. Extensional rheometers and high intensity mixers have been used to produce such flow-induced crystallization. We have found that an increase in crystallization temperature for Polypropylene can also be achieved by extrusion through twin-screw extruder. Effect of such nucleation on subsequent fabrication process, e.g. injection molding and resulting mechanical properties were studied. WAXS studies showed 10% increase in crystallinity. In comparison, external nucleation shows and increase of 45% crystallinity. Increased in crystallinity was due to increase in form. The effectiveness of different methods to induce crystallization will also be discussed.
8:30 am – 9:00 am:
Nucleation of Semi-crystalline Polymers with Minerals
Saied Kochesfahani, IMERYS
A study has been conducted to determine the effect of minerals, mineral loading, and time/aging on the nucleation of semi-crystalline polymers including polypropylene and nylons. The performance of talc, mica, wollastonite, and kaolin will be covered including the effect of parameters such as particle size and morphology. Differential Scanning Calorimetry (DSC) data will be presented as well as mechanical properties of the semi-crystalline polymers.
9:00 am – 9:30 am:
Use and Utility of Metal Soaps in Polyolefins
Robert Sherman, Baerlocher
Metals soaps, such as calcium stearate and zinc stearate, are commonly used as additives in polyethylene and polypropylene. They are most commonly used as antacids but are also used as lubricants, mold releases, tracer elements, and antistatic agents. A general discussion of the types of available metals, soaps, and considerations for choosing them will be given. A general discussion of how metal soaps are made and special properties of certain soaps will also be covered.
9:30 am – 10:00 am:
Particle Additives for Simultaneous Enhancement of Degradation and Toughening in Poly (Lactic Acid) for Additive Manufacturing
Caroline Multari, Lehigh University
Our goal is to simultaneously improve fracture toughness and biodegradation behavior of poly(lactic acid) (PLA) using the same additive. Our approach explores the use of encapsulation on a series of degradation-promoting additives so that they may survive the melt extrusion process while limiting any breakdown of the matrix. In addition to promoting biodegradation such encapsulated particles are designed to enhance toughening. Such dual use particles have the potential to broaden the uses of PLA. In this work, particle properties, structure and dispersion in PLA are examined and the accompanying tensile behavior investigated. Particles with polysaccharide or protein shells with oil cores were able to be produced and dispersed within the PLA matrix with minimal leakage of the active material during extrusion to 3D printer filament. The elongation at break and yield strength were improved over neat PLA.
10:00 am – 10:30 am:
A Characterization of Soy Additives in Biobased Polyethylene Films
Peter Perez, UMass Lowell
Four different soy additives were compounded into Linear Low Density Polyethylene (LLDPE). The four different additives were compounded and pelletized by FKuR. After a film was produced for each of the four batches, the mechanical, barrier, and thermal properties of each batch was characterized and compared to a control sample. The use of soy in polymeric films improved mechanical properties in LLDPE, reduced the cost and amount of plastic used, and improved water vapor barrier of the polymer. The modulus of each film increased with the use of filler. However, the ultimate extension and ultimate tensile strength decreased in the samples containing soy fillers. The films showed increased crystallinity in samples containing soy fillers. Additionally, thermal analysis indicated large amounts of weight loss in the soy loaded films when heated.
10:30 am – 11:00 am:
Advanced Materials for Increasing Output and Reducing Energy
Will Johnson, Ecopuro
New patented technology to increase throughput in extrusion and injection molding. This technology can be used in any thermoplastic system to increase speed and improve additive distribution, while stabilizing the process reducing scrap from variation.
11:00 am – 11:30 am:
Smart Light and Energy Management with Acrylic Glass!
Péter Sebö, Quarzwerke GmbH
Light is responsible for our overall well-being and is a valuable source of energy for every person to an unlimited degree. Therefore, in modern architecture large transparent glass facades are used. In winter, the incident sunlight can so be used optimally. In summer, the sun often provides more heat than desired with negative effect on the indoor climate. During building design, the summer heat protection is therefore of central importance. The key challenge is to make best use of solar energy, while preventing indoor overheating. Conventional shading systems, whether internal or external, need complex assembly services, are expensive and often require intensive maintenance. Acrylic glass (PMMA), an affordable alternative to mineral glass, is widely used in construction and other applications. Common products in construction are especially solid sheets, multi-wall sheets and corrugated sheets. HPF The Mineral Engineers, a division of Quarzwerke Group, accepted the challenge and developed a whole new thermotrop additive. This new product was officially presented on the K-Show 2016 in Düsseldorf. This product is a masterbatch or an additive powder designed for acrylic glass. It is either homogeneously mixed with impact modified PMMA compounds or fed via dosing device during processing (extrusion or injection process). With this additive functionalized acrylic glass changes its transmittance of light and solar radiation as a function of the ambient temperature. When the temperature is increasing, on hot summer days for example, it switches from transparent state into a milky white state. This effect is adaptive and reversible, so the use of daylight and solar energy can be controlled. This presentation will show and explain the function and the effect of this new and innovative masterbatch and will point out how this new HPF product can solve some of the issues in the application area of daylight systems. The whole content is supported by investigation results and some application examples.