Preparation and characterisation of PBT/carbon nanotubes polymer nanocomposites
Magdalena Kwiatkowska*, Georg Broza**, Joanna Męcfel**8, Tomasz Sterzyński***, Zbigniew Rosłaniec**** *Politechnika Szczecińska, Instytut Inżynierii Materiałowej, al. Piastów 19, 70-310 Szczecin **Technical University Hamburg-Harburg, Polymer Composites, Denickestrasse 15, D-21 071 Hamburg, Germany ***Akademia Techniczno-Rolnicza, Wydział Technologii i Inżynierii Chemicznej, ul. Seminaryjna 3, 85-326 Bydgoszcz ****Politechnika Szczecińska, Instytut Inżynierii Materiałowej, al. Piastów 19, 70-310 Szczecin
Quarterly No. 2, 2005 pages 99-104
DOI:
keywords:
abstract The objective of this report is to evaluate the effect of carbon nanotubes (CNT) on the properties of polybutylene tere+ phthalate (PBT) thermoplastic matrix. Three different kind of CNT were used: multiwalled carbon nanotubes (MWCNT), multiwalled carbon nanotubes with amine groups (MWCNT-NH2) and oxidized single walled carbon nanotubes (oSWCNT). The nanocomposites were obtained by introducing CNT into the reaction mixture during the synthesis of PBT (the in situ method) (Fig. 1). In order to ensure the uniform distribution of CNT in polymer system the nanofillers were dispersed in 1,4-butanediol just before starting the synthesis. Scanning electron microscopy (SEM) confirms good dispersion of CNT, but the presence of agglomerates is also identified (Fig. 4). The thermal analysis (DSC) indicates that the incorporation of every kind of CNT improves a crystallization ability of PBT and MWCNT accelerate crystal growth mechanisms (Fig. 2, Tab. 1). An addition of CNT changes the dynamic - mechanical properties of PBT as show DMTA measurements (Fig. 3). Slight increase of mechanical properties has been also observed for the additive of MWCNT and MWCNT-NH2. However in a case of oSWCNT a significant increase of elasticity modulus has been demonstrated (Fig. 5). No distinct differences in changes of PBT properties have been observed in connection with using multi walled carbon nanotubes and multi walled carbon nanotubes with amine groups. Key words: poli(butylene terephthalate), carbon nanotubes, polymer nanocomposites