A series of novel dendrons and dendrimers skeleton-constructed with azobenzene moiety were synthesized with 4-carboxy-4′-(1,2-propanediolether)-azobenzene as an AB2 monomer and 4-carboxy-4′-(n-butylether)-azobenzene as a peripheral monomer via a convergent approach and proceeding in a repeated stepwise growth manner. The NMR, GPC, and MALDI-TOF-MS measurements show that the obtained products possess regular molecular architecture and thus monodispersed molecular weights. It will be of interest to investigate the self assemble behavior of the polymers and the promising applications for the dendrimers as the dendritic boxes in the subsequent works.
The fabrication of microlens based on a novel photopolymerizable formulation, consisting of acrylated hyperbranched polyisophthalate (HPIPA), 1,6-hexanediol diacrylate (HDDA) and Irgacure 184, with the free flow technique was presented. The good focalization and low chromatism of the fabricated microlens were obtained with scanning near-field optical microscope and measuring the optical transfer function versus spatial frequency, respectively. The positive effects of good compatibility with acrylated monomers and a low shrinkage degree for HPIPA on focalization have also been described. The further research work about the fabrication of microlens with acrylated hyperbranched polyisophthalate is in progress.
