국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	Multiscale Modeling of Thermal Conductivity of Polymer/Carbon Nanocomposites
저자	Clancy, Thomas C.;; Frankland, Sarah-Jane V.;; Hinkley, Jeffrey A.;; Gates, Thomas S.
Keyword	AMORPHOUS MATERIALS;; CARBON NANOTUBES;; CHEMICAL BONDS;; ESTIMATING;; GRAPHITE;; MATRIX MATERIALS;; MOLECULAR DYNAMICS;; NANOCOMPOSITES;; NANOPARTICLES;; POLYETHYLENES;; POLYMER MATRIX COMPOSITES;; SIMULATION;; THERMAL CONDUCTIVITY;; THERMAL RESISTANCE
URL	http://hdl.handle.net/2060/20100033384
보고서번호	LF99-8623
발행년도	2010
출처	NTRS (NASA Technical Report Server)
ABSTRACT	Molecular dynamics simulation was used to estimate the interfacial thermal (Kapitza) resistance between nanoparticles and amorphous and crystalline polymer matrices. Bulk thermal conductivities of the nanocomposites were then estimated using an established effective medium approach. To study functionalization, oligomeric ethylene-vinyl alcohol copolymers were chemically bonded to a single wall carbon nanotube. The results, in a poly(ethylene-vinyl acetate) matrix, are similar to those obtained previously for grafted linear hydrocarbon chains. To study the effect of noncovalent functionalization, two types of polyethylene matrices. aligned (extended-chain crystalline) vs. amorphous (random coils) were modeled. Both matrices produced the same interfacial thermal resistance values. Finally, functionalization of edges and faces of plate-like graphite nanoparticles was found to be only modestly effective in reducing the interfacial thermal resistance and improving the composite thermal conductivity.