Molecular rotor dynamics influenced by the elastic modulus of polyethylene nanocomposites | Zendy

AhYoung Jee | Zendy; Haneul Kwon | Zendy; Minyung Lee | Zendy

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Molecular rotor dynamics influenced by the elastic modulus of polyethylene nanocomposites

Author(s) -

AhYoung Jee,

Haneul Kwon,

Minyung Lee

Publication year - 2009

Publication title -

the journal of chemical physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.071

H-Index - 357

eISSN - 1089-7690

pISSN - 0021-9606

DOI - 10.1063/1.3261730

Subject(s) - polyethylene , molecular dynamics , nanocomposite , materials science , dynamics (music) , composite material , rotor (electric) , elastic modulus , modulus , polymer science , chemistry , physics , mechanical engineering , computational chemistry , engineering , acoustics

We observed that the excited-state twisting motion of 3,3(')-diethyloxacarbocyanine in polymer nanocomposites (PNCs) depends strongly on the elastic modulus of medium. PNCs consist of low density polyethylene dispersed with surface-functionalized nanodiamonds with various alkyl groups. The mechanical properties of the PNCs were measured by a nanoindentation method, and the photoisomerization processes of the cyanine dye doped in the composites were investigated by time-resolved fluorescence spectroscopy. It was found that the molecular rotor dynamics in rigid media should be quantitatively describable by the elastic modulus of polymer.

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