8:00 am – 11:30 am:
W1-Alloys and Blends: Morphology, Compatibilization and Performance of Polymer Blends
(Moderator: Rubinder Kaur Lakhman)-Room S320D
8:00 am – 8:30 am:
Semiconductive LLDPE Power Cable Insulation Shield
Jason Zhang, General Cable
The application of linear low density polyethylene (LLDPE) in semiconductive medium voltage power cable strippable insulation shield (IS) is investigated in this work. Carbon black is mixed in the LLDPE alone and LLDPE/EVA blend in IS compounds for study. The critical performances of the IS compound, such as compatibility of carbon black, mechanical properties, strippable force to XLPE, electrical property, are briefly evaluated initially for the feasibility of LLDPE in such application. The results meet the basic requirement and indicate such possibility with cost benefit.
8:30 am – 9:00 am:
Structure-property Relationships of Microporous Membranes Produced by Biaxial Orientation of Compatibilized PP/Nylon 6 Blends
In this study, microporous membranes were fabricated from polypropylene/polyamide 6 blends compatibilized with polypropylene grafted maleic anhydride. Biaxial orientation of these blend films within a narrow composition range yielded through-pore membranes with adjustable pore size and porosity. The morphologies of the through-pore membranes were characterized by scanning electron microscopy. The effects of composition, draw ratio, and initial film thickness on porosity, and water permeation were evaluated. The blend film thickness was found to be the major variable upon membrane properties where higher thickness yielded lower density and smaller pores. These blend membranes were employed as the filtration media to separate Latex microbeads in aqueous solutions. It was discovered that the blend membranes could achieve >99% filtration efficiency using 100 nm Latex microbeads.
9:00 am – 9:30 am:
Investigation of Droplet Behavior Under Real Mixing Conditions
Oguz Celik, Research Assistant, Institut für Kunststofftechnik – University of Stuttgart
Plastics gain higher impact strength when they contain a certain amount of a soft-phase. In case of incompatible blending components, the properties of the final product depend usually on the soft-phase’s droplet size distribution. Therefore, many research activities address the prediction of the droplet sizes during plastic processing. However, the investigations are done under laboratory conditions usually and often representative polymeric model fluids are used instead of real plastic melts. In this work a novel experimental setup was constructed, which allows to research the droplet behavior under real operating conditions with plastic melts. Experiments were carried out and the droplet size distribution was evaluated under several conditions. In the next steps a simulation model for prediction of the droplet size distribution will be developed.
9:30 am – 10:00 am:
Influence of Processing andFormulation on the Properties of PP-PET-blends
Christoph Burgstaller, Managing Director and Head of R&D, TCKT
The aim of this work was to investigate the effects of the composition and processing on the properties of PP-PET blends with and without compatibilisation. As the processing routes blend production via a co-rotating twin screw extruder as well as single screw extruder were chosen. We found, that it is possible to compatibilize PP-PET blends via the addition of maleic anhydride grafted PP. This effect can be seen from the morphology of the samples as well as from mechanical properties. In twin screw extrusion, the application of vacuum degassing shows additional property improvement due to the condensation of PET. The compatibilizer is also effective in single screw extrusion, but the effect is lower due to the missing degassing options. Nevertheless, the compatibilized blends are stable and the results show, that such mixed plastics, which can also be found in waste streams, can be reused when being properly processed.
10:00 am – 10:30 am:
Nylon 12/PMMA/San Alloys for Translucent Medical Catheters
Timothy Largier, Foster Corporation
A Nylon 12 (PA12) alloy with polymethyl methacrylate (PMMA), styrene acrylonitrile (SAN), and styrene maleic anhydride (SMA) was optimized to increase flexural modulus while maintaining translucency. It was found that the optimal PMMA/SAN ratio to reduce haze in PA12 is 68.5/31.5. This allowed for the blend system to maintain translucency at all loadings of PA12. Mechanical testing was performed revealing that the flexural modulus was improved from the base resin from 154,915psi to 301,658 psi. Tubing samples that were produced as prototype catheters are robust, translucent, and flexible.
10:30 am – 11:00 am:
Design of Extensional Flow Static Mixers for Blending of Ternary Nanoparticle-Polymer-Polymer Blends
Matthew Thompson, Toray Composite Materials America, Inc.
In this work, static mixers were designed, fabricated, and tested that employ strong extensional flow fields to promote dispersion in immiscible thermoplastic polymer blends. Additionally, surface-treated nanoparticles were added to the blends for the purpose of compatibilizing the immiscible polymers. Several relatively simple, easily fabricated designs are discussed along with their efficacy at promoting dispersion in a blend of high-viscosity high-density polyethylene (HDPE) dispersed in low-viscosity polystyrene (PS). Several commercial grades of fumed nanosilica with various surface chemistries were investigated to study their effects on the polymer blend morphology with and without processing through the extensional flow static mixers. Some simple design rules were determined to aid in the design of extensional flow static mixers, or extensional flow cells (EFCs), based on results processing unfilled binary polymer blends, and the efficacy of ternary nanoparticle-polymer-polymer blend processing for controlling the morphology of the blend was evaluated.
11:00 am – 11:30 am:
KEYNOTE: Bio-polymer Alloys and Blends: Past, Present and Future
Roger Avakian, PolyOne
This presentation will give examples of how alloys and blends have been utilized to enhance the properties and processing of bio-polymers. An overview of the three generations of bio-polymers will be given with examples of polymer modification of each. In conclusion the presenter will give a look into the future of bio-polymer alloys and blends and what technical approaches will be used to design them for specific applications.
8:00 am – 11:30 am:
W2-Automotive: Materials Development-Room S320E
8:00 am – 8:30 am:
Innovations in Automotive Plastics “Materials and Processes”
Suresh Shah, Delphi -Retired
This presentation will discuss Innovations in Automotive Plastics “Materials and Processes/Enabling Technologies based on recent 2017 automotive innovations awards finalists and winners as well as recent innovations not submitted for awards.