Syntheses and characterization of functionalized polynorbornene dicarboximides for flexible substrates

Abstract

In this study, we synthesized polynorbornene (PNB) dicarboximides substituted by monochlorophenyl group (PMCPhNDI) and dichlorophenyl group (PDCPhNDI) via ring‐opening polymerization using a ruthenium catalyst and investigated their thermal, mechanical, and optical properties. We also discussed the performance and application of the functionalized PNB dicarboximide films as flexible substrates for organic light‐emitting devices (OLEDs). The polymer films exhibited good optical transparency with an average transmittance of around 97% in the visible light region and good thermal stability with a 5% degradation temperature of >440°C. The polymers were applied for flexible displays, which were coated on indium tin oxide (ITO) thin films using a radio‐frequency planar magnetron sputtering system with changing the deposition substrate temperatures. A flexible OLED that was fabricated on the ITO‐grown polymer substrates exhibited a performance as comparable to the corresponding ITO‐grown glass substrates. Copyright © 2012 John Wiley & Sons, Ltd.

Preparation and characterization of polynorbornene/sepiolite hybrid nanocomposite films

“…Polynorbornene dicarboximide (PND) with linear aliphatic and aromatic substituents has been synthesized by ring‐opening metathesis polymerization (ROMP) . The imide side chain that contains polynorbornene exhibited a high T g , good physical and mechanical properties, and high thermal resistance . For example, poly( N ‐adamantyl‐norbornene‐5,6‐dicarboximide) had a T g of 271 °C .…”

“…The amine‐modified sepiolite was well dispersed in N , N ‐dimethylacetamide (DMAc), a well‐known organic solvent, because of the interaction between the amine groups on the sepiolite and amide groups of DMAc. The amine‐functionalized sepiolite was coated with PND substituted with a dichlorophenyl group at the N‐positions of the imide chains, as reported elsewhere . The prepared PND/sepiolite hybrid nanocomposite films exhibit enhanced mechanical and dimensional stability and oxygen barrier properties.…”