|학술대회||2005년 가을 (10/21 ~ 10/22, 인하대학교)|
|권호||11권 2호, p.1633|
|제목||Thermogravimetric analysis of silicone/clay nanocomposites|
|초록||Difunctional hydroxyl-terminated poly(dimethylsiloxane) (PDMS) was used to synthesize end-linked networks in bulk state. Silicone rubber cured with PDMS, tetrafunctional cross-linkers and tetrapropyl orthosilicate (TPOS) Γ-aminopropyl triethoxy silane (APTES) was added to introduce amine groups to the silicone rubber. In addition, the silicone rubber was compounded with Cloisite®25A(C25A), C20A and C30B. Higher degree of exfoliation of the silicate layers was obtained in all of ! the silicone/clay composites. The kinetics of the thermal degradation and thermal stability of the silicone rubber and its composites with C25A, C20A and C30B was studied by the thermogravimetric analysis under a nitrogen atmosphere at different heating rate. The activation energy for the thermal degradation was determined by way of the Flynn-Wall-Ozawa’s method and the Kissinger one. The measured activation energy of the silicone/clay composites indicated that the composites with exfoliated clay platelets was more thermally stable than that of the pristine silicone rubber.
Acknowledgement - Authors are gratefully acknowledging the financial support by Agency for Defence Development.
|키워드||silicone rubber; clay; thermogravimetric; activation energy|