P‐206: Improved OLEDs with Single Ambipolar Material for Hole‐Transport and Electron‐Transport Layers

The evolution of the flexural modulus of poly(e-caprolactone), prepared with a tin(II) 2-ethylhexanoate catalyst, was measured in terms of the polymer molecular weight and moisture content. Changes in the polymer molecular weight were observed, but these did not result in a loss of modulus. Fickian diffusion was used to characterize the absorption of moisture into the polymer. The maximum moisture content and moisture diffusivity constant of the polymer were determined to be 0.62% and 2.039 3 10 25 mm 2 /s, respectively. Reductions in the polymer modulus from 0.5 to 0.4 GPa were attributed to water plasticization. An empirical expression for the polymer modulus as a function of immersion time was developed.

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Modeling changes in the modulus of poly(ε‐caprolactone) due to hydrolysis and plasticization

Aitchison

Walker

Jones

et al. 2007

J of Applied Polymer Sci

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The effect of production regime and crucible materials on the thermal properties of sodium phosphate glasses produced from salts

et al. 2004

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Changes in the thermal properties of sodium phosphate glasses during melt production have been investigated using Pt/Au and fused alumina crucibles. Glasses were produced from NaH(2)PO(4) as a starting material, providing an intrinsic Na(2)O:P(2)O(5) ratio of 1:1 and giving an O/P = 3, that is, a metaphosphate. In Pt/Au crucibles, glass transition temperatures rose to a plateau value of 295 degrees C at a rate determined by melt temperature. No contamination of the glass by platinum or gold was detected or indicated in the results. E(a) for the reaction was found to be 66.4 kJ mol(-1). In fused alumina crucibles, glass transition temperatures rose to over 450 degrees C, with these values showing some convergence at higher furnace temperatures. Extensive erosion of the alumina crucibles was observed. The amount of alumina incorporation within the glasses correlated well with the rise in glass transition temperature up to a maximum of 15.5 mol % Al(2)O(3) content. Al(2)O(3) incorporation above this value caused a reduction in the value of the T(g).

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P‐206: Improved OLEDs with Single Ambipolar Material for Hole‐Transport and Electron‐Transport Layers

Cited by 2 publications

References 15 publications

Modeling changes in the modulus of poly(ε‐caprolactone) due to hydrolysis and plasticization

Modeling changes in the modulus of poly(ε‐caprolactone) due to hydrolysis and plasticization

The effect of production regime and crucible materials on the thermal properties of sodium phosphate glasses produced from salts

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