Correlation of the Abbe Number, the Refractive Index, and Glass Transition Temperature to the Degree of Polymerization of Norbornane in Polycarbonate Polymers

Abstract

The influences of the average degree of polymerization (Dp), which is derived from Mn and terminal end group, on optical and thermal properties of various refractive indexed transparent polymers were investigated. In this study, we selected the alicyclic compound, Dinorbornane dimethanol (DNDM) homo polymer, because it has been used as a representative monomer in low refractive index polymers for its unique properties. DNDM monomer has a stable amorphous phase and reacts like a polymer. Its unique reaction allows continuous investigation from monomer to polymer. For hydroxy end group and phenolic end group polymers, the refractive index (nd) decreased with increasing Dp, and both converged to same value in the high Dpregion. However, the Abbe number (νd) of a hydroxy end group polymer is not dependent on Dp, and the νd of a phenolic end group polymer is greatly dependent on Dp. As for glass transition temperatures (Tg), both end group series were increased as Dpincreased, and both converged to the same value.

Development of Zn1−xBaxO nanoparticles reinforced poly(vinyl alcohol) macromolecular nanocomposite films: Eco‐friendly integrated materials for optical systems

“…However, it is well known that the compact digital cameras used in modern smart phones capture high quality images through an intelligent designing of combination of lenses with high RI/low υ D and vice‐ versa. The combination of these two materials is essential for correcting optical aberrations and obtaining high resolution images 46 . The optical dispersion characteristics of nanocomposite films were further established by measuring the Abbe's number.…”

“…The combination of these two materials is essential for correcting optical aberrations and obtaining high resolution images. 46 The optical dispersion characteristics of nanocomposite films were further established by measuring the Abbe's number. The Abbe's (υ D ) number for pristine PVA and PVA/Zn 1Àx Ba x O composite films were deduced via corresponding RI values using empirical Equation (10) above.…”

Influence of polymerization pressure and post-cure treatment on conversion degree and viscoelastic properties of polymer infiltrated ceramic network

“…2 (a)-(b) for groups without PC. Indeed relation between the T g and DC, and using T g as an index of progress of cure (DiBenedetto, 1987;Kato et al, 2020;Lovell et al, 2001;Pascault and Williams, 1990) and between T g and E' have been reported (Sanditov et al, 2012).…”

Recent Progress in Sulfur-Containing High Refractive Index Polymers for Optical Applications

“…In the visible spectrum, this property of the material's dispersion can be nm. 42 The Abbe number can also be expressed in terms of molar refraction [R] as given in eq 3…”

“…The change in the refractive index of a material with the wavelength can be approximately measured using the parameter called the Abbe number (ν D ). In the visible spectrum, this property of the material’s dispersion can be expressed as ν D = ( n D – 1)/( n F – n C ), where n D , n F , and n C denote the refractive indices of the material at 589, 486, and 656 nm . The Abbe number can also be expressed in terms of molar refraction [ R ] as given in eq ν normalD = 6 n normalD ( n normalD 2 + 2 ) ( n D + 1 ) false[ R false] false[ normalΔ R false] where [Δ R ] is the molar dispersion.…”