03/06/2012

www.gupta-verlag.de/thermoplastic-elastomers

Thermoplastic Elastomers at Eurotec 2011

Tu Le Ngo, Visteon
Thin TPO Overmolding to Decorate Vehicle Interiors
Many car manufacturers use thin films of polyolefin blend thermoplastic elastomers (TPOs) for decorating car interiors, including instrument and door panels. Using overmolding such parts by thin TPO films replaces painting as an established technology. The paper presented the new generation of soft TPO films "ready for graining and the innovative tooling used for the lamination of the film during the polypropylene injection shot. Wolfgang Diegritz, Tanya Weyland, BASF
Stabilization of PP/TPO in Automotive Applications
Both polypropylene and TPOs are polypropylene copolymers are widely used in automotive applications. Overall performances required by OEMs are getting more stringent than ever. This applies predominantly to resistance to light and long-term thermal stability. However, secondary properties such as low stickiness, reduction of odor and emissions are becoming important. Thus additional compounding ingredients such as talcum, carbon black and surface modifiers influencing the above-mentioned properties are being used more and more frequently. [image_0] Goknur Bayram, Middle East Technical University
Multiblock Polyester Elastomers/Zinc Oxide Composites: Preparation and Characterization
Compounding of thermoplastic elastomers with fillers can enhance their properties. Zinc oxide was introduced into block copolymers of poly(butylenes terephthalate) and poly(tetramethylene oxide) by melt compounding. The thermal conductivity and the coefficient of thermal expansion of the composites were investigated as a function of zinc oxide type and concentration. It was found that addition of ZnO increased thermal stability while it decreased the coefficient of thermal expansion of the composites at low temperatures (65-70 °C). James Kennedy, Athlon Institute of Technology
Development of Polyether-block-amide/montmorillonite (MMT) Nanocomposite for Use in Angioplasty Balloon Applications
The focus of this study was the investigation of organically modified montmorillonite nanoclay within a polyether-block-amide (Pebax) matrix for angioplasty balloon applications. Interactions between the Pebax and nanoclay are reflected in the DMTA results, which show significant increase in storage modulus and a broader relaxation at the glass transition temperature. Confirmation was established by the use of tensile tests where the ultimate tensile strength and the strain at break were found to increase, which are desired properties. [image_1_right] Ludovic Gardet, Eastman
Novel Copolyesters for Housewares and Medical Applications
Novel, tough transparent copolyesters have been recently developed by Eastman Chemical Company. These new polymers with the tradename Eastman Tritan copolyesters have higher glass transition temperature than traditional copolyesters while keeping the benefits of transparency and excellent chemical resistance combined with exceptional toughness. The properties of this product allow it to be used in applications such as housewares and medical devices. The paper described the basic chemistry and structure- property relationships of Tritan copolyesters. These results were discussed in the context of other commercial engineering thermoplastic polymers such as polycarbonate, acrylics and styrenics. In addition properties of the different commercial grades of the new polymer were described and compared to other common thermoplastics. Anthony Walder, Lubrizol
Hydrophobic Thermoplastic Polyurethanes”
Because of their low temperature flexibility, excellent abrasion, high tensile strength and good processing characteristics thermoplastic polyurethanes (TPUs) are used in many demanding applications. Medical applications often require soft grades of TPUs; traditionally with hardness Shore durometer above 70A. Recently developed grade with a hardness Shore 62A has been developed. This paper presented this grade. The softness of this product was achieved without the use of plasticizers as is often the case with other soft TPEs. -JD-

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