| Abstract: | A novel dendritic polyisophthalate with 12 naphthyl groups at the chain ends was synthesized from 5‐hydroxyisophthalic acid as an AB2 monomer, 1,3,5‐benzenetricarbonyl trichloride as an ‘initiator core’ molecule, and β‐naphthol as an endcapping reagent, via a stepwise growth process. An average molecular weight of 2860 g mol?1, and a refractive index of 1.618 at 650 nm were obtained by gel permeation chromatography and ellipsometry, respectively. A photopolymerizable recording dry film incorporating this dendrimer as a polymeric binder was used for holographic recording. Diffraction gratings with diffraction efficiency exceeding 80%, together with a modulation index of 10?2 were obtained. Copyright © 2004 John Wiley & Sons, Ltd. |
