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 techn...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.展开更多
The photopolymerization kinetics of cycloaliphatic epoxide and oxetane with accelerators were investigated with Real-time Fourier transform infrared spectroscopy(RT-FTIR).The consumption rates of epoxy group and oxeta...The photopolymerization kinetics of cycloaliphatic epoxide and oxetane with accelerators were investigated with Real-time Fourier transform infrared spectroscopy(RT-FTIR).The consumption rates of epoxy group and oxetane group as a function of time were obtained by monitoring of the absorption peaks in the 789 cm-1 and 981 cm-1.The effect of accelerators type and the accelerating mechanism were discussed.In general,benzyl alcohol and its analogues with electron-donating substituents are useful accelerators for the cationic polymerization of cycloaliphatic epoxide and oxetane.Activated monomer mechanism and free-radical chain-induced decomposition of onium salt cationic photoinitiator account for the observed accelerating effect on the polymerization rate.展开更多
文摘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.
基金Natural Science Foundation of Hubei Province of China(No.2005ABA181)National Innovation Fund for Small Technology-based Firms(No.05C26214201059)
文摘The photopolymerization kinetics of cycloaliphatic epoxide and oxetane with accelerators were investigated with Real-time Fourier transform infrared spectroscopy(RT-FTIR).The consumption rates of epoxy group and oxetane group as a function of time were obtained by monitoring of the absorption peaks in the 789 cm-1 and 981 cm-1.The effect of accelerators type and the accelerating mechanism were discussed.In general,benzyl alcohol and its analogues with electron-donating substituents are useful accelerators for the cationic polymerization of cycloaliphatic epoxide and oxetane.Activated monomer mechanism and free-radical chain-induced decomposition of onium salt cationic photoinitiator account for the observed accelerating effect on the polymerization rate.
