Title of article :
Thermal and electrical properties of poly(l-lactide)-graft-multiwalled carbon nanotube composites
Author/Authors :
Hun-Sik Kim، نويسنده , , Byung Hyun Park، نويسنده , , Jin-San Yoon، نويسنده , , Hyoung-Joon Jin، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2007
Pages :
7
From page :
1729
To page :
1735
Abstract :
The dispersion of the nanometer-sized carbon nanotubes in a polymer matrix leads to a marked improvement in the properties of the polymer. This approach can also be applied to biodegradable synthetic aliphatic polyesters such as poly(l-lactide) (PLLA), which has received a great deal of attention due to environmental concerns. In this study, PLLA was melt compounded with multiwalled carbon nanotubes (MWCNTs). A high degree of dispersion of the MWCNTs in the composites was obtained by grafting PLLA onto the MWCNTs (PLLA-g-MWCNTs). After oxidizing the MWCNTs by treating them with strong acids, they were reacted with l-lactide to produce the PLLA-g-MWCNTs. The morphology of the composite was observed with scanning electron microscopy. The mechanical properties of the PLLA/PLLA-g-MWCNT composite were higher than those of the PLLA/MWCNT composite. The thermal stability of the composites was studied using thermogravimetric analysis and their activation energy during thermal degradation was determined using the Kissinger and Flynn–Wall–Ozawa methods. The activation energy of PLLA/PLLA-g-MWCNT was higher than that of PLLA/MWCNT, which indicates that the composite made with the PLLA-g-MWCNTs was more thermally stable than the composite made with the MWCNTs.
Keywords :
biodegradable , Carbon nanotubes , Multiwalled carbon nanotubes , Poly(L-lactide) , nanocomposites
Journal title :
European Polymer Journal(EPJ)
Serial Year :
2007
Journal title :
European Polymer Journal(EPJ)
Record number :
1214865
Link To Document :
بازگشت