Photoactive polyamideimides synthesized by the polycondensation of azo-dye diamines and rosin derivative

Seung Ju Kim, Beom Jun Kim, Dong Wook Jang, Se Hun Kim, Soo Young Park, Ju Hyun Lee, Sin Doo Lee, Dong Hoon Choi

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New rosin-based photoactive polyamideimides (PAI-a and PAI-b) with a large second-order nonlinear optical coefficient and photoinduced birefringence were synthesized by the polycondensation of rosin-maleic anhydride adduct (RMA) with azo-dye diamines, 2-(2-{ethyl-[4-(4-nitrophenylazo)phenyl]aminoethoxy)benzene-1,4- diamine (4a) or 2-(2-{ethyl-[4-(4- methylsulfonylphenylazo)phenyl]amino}ethoxy)benzene-1,4-diamine (4b). Due to the bulky alicyclic structure of the rosin, these polymers were highly soluble in organic solvents and could easily be processed by spin-coating into thin films of high optical quality. Fabricated polymer films were very smooth, tough, adhesive to the substrate, and optically clear. Second-order nonlinear optical coefficients (d33) of the corona-poled PAI-a and PAI-b films were 83 and 54 pm/V, respectively, at the fundamental wavelength of 1064 nm. Birefringences as high as 0.072 for PAI-a and 0.035 for PAI-b could be induced and erased repeatedly by the irradiation of linearly polarized and circularly polarized 532-nm light, respectively.

Original languageEnglish
Pages (from-to)687-695
Number of pages9
JournalJournal of Applied Polymer Science
Issue number4
Publication statusPublished - 2001 Jan 1
Externally publishedYes


ASJC Scopus subject areas

  • Polymers and Plastics

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