Properties Of Side-chain Polymers Research Articles

Synthesis and fluorescent properties of PAA-based new side chain polymers

Poly (amic acid) (PAA) was synthesized by the condensation polymerization of benzoguanamine (BGA) and pyromellitic dianhydride (PMDA) under microwave irradiation. Then a series of PAA-based new side chain polymers have been synthesized through azo coupling reaction. Azobenzol units are attached to the PAA side chain, and different groups were selectively introduced to the para position of azobenzol units in order to investigate the electronic effects on fluorescent properties of side chain polymers. FT-IR, Fourier transform Raman spectrum (FTRR) and 1H-NMR were performed to characterize the polymers to investigate the graft polymers. UV–Vis and fluorescent spectra of PAA and its graft polymers were investigated. Comparing the side chain polymers containing different para substituting groups with PAA before graft, the relationship between polymer structure and its fluorescent properties had been studied.

Light-Emitting Properties of Side-Chain Polymer (EH-PMA) and its Blend with MEH-PPV

A side chain polymer, alkoxy-ethylhexyloxystilbene substituted PMA derivative (EH-PMA), was synthesized through radical polymerization route. EH-PMA was blended with MEH-PPV by changing their weight ratios. The EL emission peakes of the polymer blends showed at the region of 570–580 nm which corresponds to MEH-PPV only, indicating that the energy transfer from the high energy state EH-PMA to the low energy state MEH-PPV exists in EL devices.