Investigation of a new electro-optical guest-host polyetherketone polymer films

摘要

The polyetherketone (PEK-c) guest-host system thin films in which the range of the weight percent of 3-(1, 1-dicyanotheny1)-1-pheny 1-4, 5-dihydro-1 H-pyrazole (DCNP) is from 20/100 to 50/100 were prepared. Their corona poling temperatures were optimized by using the in situ second-harmonic generation (SHG) measurement. The high predicted value of electro-optical (EO) coefficient γ_33 =48.8 pm/v by using two-level model was obtained when the weight percent of DCNP in the polymer system is 40/100, but EO coefficients are attenuated at higher chromophore loading than 40/100. The temporal stability of the EO activity of the guest-host polymer was evaluated by probing the decay of the orientational order of the chromophores in the polymer system.