Preparation and Properties of A Novel Y-type Nonlinear Optical Polyester with Dioxybenzylidenecyanoacetate Groups

다국어 초록 (Multilingual Abstract)

Methyl 2,4-di-(2'-hydroxyethoxy)benzylidenecyanoacetate (3) was prepared and polymerized with terephthaloyl chloride to yield a novel Y-type polyester 4 containing 2,4- dioxybenzylidenecyanoacetate groups as NLOchromophores, which constituted parts of the polymer backbone. The resulting polymer 4 is soluble in common organic solvents such as acetone and N,N-dimethylformamide. Polymer 4 showed thermal stability up to 280 °C
in thermogravimetric analysis with glass-transition temperature obtained from differential scanning calorimetry near 108 °C
. The second harmonic generation (SHG) coefficient (d33) of poled polymer films at the 1064 nm fundamental wavelength was around 3.54 × 10-9 esu. The dipole alignment exhibited a thermal stability up to near Tg and no significant SHG decay was observed below 100 °C
due to the partial main-chain character of polymer structure, which is acceptable for NLO device applications.

참고문헌 (Reference)

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