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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 8: POSTER: Polymer Physics

CPP 8.29: Poster

Montag, 26. März 2007, 16:00–18:00, Poster B

Nanocalorimetric study of syndiotactic poly(propylene) (sPP) with different content of carbon nanotubes — •Sergey Adamovsky¹, Felice De Santis², and Christoph Schick¹ — ¹Institute of Physics, University of Rostock, Universitaetsplatz 3, 18051 Rostock, Germany — ²Department of Chemical and Food Engineering, University of Salerno, 84084 Fisciano (SA), Italy

Polymer carbon nanotube composites attracted a great deal of attention in recent years. It is known, that electrical conductivity, shear viscosity, other mechanical and thermal properties of polymers are strongly influenced by the presence of small amounts (fractions of percent) of carbon nanotubes (CNT). Crystallization behaviour as well as crystal structure should be affected too.

A novel technique [1], based on a nanocalorimetric chip [2] was applied to study the crystallization of syndiotactic poly(propylene) (sPP) filled with different amount of carbon nanotubes. A pure sPP was measured as a reference. Sample mass of as small as about 100 ng allows us to use a heating/cooling rates of up to 500000 K/s which extends the rate range available in DSC dramatically. Together with DSC a range of cooling rates of 0.005 K/s to 500000 K/s was covered. A strong dependence of the crystallization temperature on cooling as well as of the crystallization half-time during isothermal crystallization on the CNT-content was observed.

1. S Adamovsky, C Schick. Thermochimica Acta, Vol. 415, Issue 1 (2004) Pages 1-7.

2. Xensor Integration, www.xensor.nl