Nanocomposites Based on Thermoplastic Polyester Elastomers (original) (raw)
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eXPRESS Polymer Letters
Graphene Nanoplatelets/Carbon Nanotubes/poly(trimethylene terephthalate-block-poly(tetramethylene oxide) segmented copolymer (PTT-PTMO) hybrid nanocomposites were synthesized via in situ polymerization. A remarkable synergistic effect between GNPs and SWCNTs on improving thermal and mechanical properties of nanocomposites based on segmented block copolymers was observed. Heterogeneous structure of the PTT-PTMO allowed for a better and more uniform distribution of both types of nanoparticles and stabilized the structure in question. This enabled to observe a so-called “synergistic effect”, caused by the use of mixture of carbon nanotubes and graphene nanopletelets, on enhancement of thermal and mechanical properties of the obtained polymer. In order to ascertain the influence of mentioned carbon nanostructures on the nanoseparated phase structure of the synthesized PTT–PTMO block copolymers, DSC and DMTA measurements were performed. SEM and TEM images of the PTT-PTMO nanocomposites d...
Express Polymer Letters, 2011
Poly(trimethylene terephthalate) nanocomposites containing COOH functionalized multi-walled nanotubes were synthesized with in situ polymerization method. The microstructure of the nanocomposites was studied by SEM, in terms of the dispersion state of the nanotubes and the polymer-nanotube interface. The thermal behaviour, mechanical properties and conductivity of these resultant PTT/MWCNTs nanocomposites were studied. The effect of the presence of MWCNTs on cold crystallization of PTT was monitored by dielectric spectroscopy. From thermal analysis study, it is found that the melting temperature and glass transition temperature are not significantly affected by the addition of MWCNTs. The crys- tallization temperature of PTT matrix is affected by the presence of CNTs. Nanocomposites have slightly higher degree of crystallinity than neat PTT and their thermo-oxidative stability is not significantly affected by the addition of MWCNTs. The study of the isothermal cold crystallization o...