Polarizing group attached acrylates and polymers viewing high refractive index

High refractive index of transparent acrylate polymers functionalized with alkyl sulfur groups

“…The progress of the reaction was monitored by TLC and on completion the reaction mixture was diluted with water (30 ml) and brine (20 ml) and dried over anhydrous MgSO 4 . The solution was concentrated to produce a crude product and purified by column chromatography on silica gel using ethyl acetate and hexane (1/7, v/v) as the eluent to yield 3 (3.2 g, 71% Synthesis of (4-(methylthio)phenyl)methanol (5). Sodium borohydride (0.76 g, 20.0 mmol) was added to a stirred solution of 4-(methylthio)benzaldehyde 4 (30 g, 20.0 mmol) in methanol (60 ml).…”

“…[1][2][3][4] Recently, high refractive index polymers and copolymers were reported for optical and microelectronic applications. 5,6 The refractive index is an important materials property for manipulating light and has been elaborately controlled for optical waveguides, lenses and prisms. 7 The use of organic polymers in optical waveguide devices, particularly for applications in optical networks based on wavelength division multiplexing, has been actively pursued in the last decade because of their ease of processing, low cost and good compatibility for integration with semiconductor components.…”

“…The introduction of polarizing groups as functional substituents considerably affects the refractive index of organic materials. 5 In this study, we design soluble linear polyacrylates composed of particular acrylate monomers having a high refractive index. Many copolymers are prepared with various monomer contents.…”

“…Recently, a dipolar structure was found to increase the refractive index of aromatic systems. 5 A study indicated that polyacrylates were highly transparent toward visible light even though absorption tails from the electronic transition that occurred at around 400 nm. 5 A waveguide requires elaborate control of the refractive index of materials for long light transmission, and is composed of core and clad layers with different refractive indices.…”

“…5 A study indicated that polyacrylates were highly transparent toward visible light even though absorption tails from the electronic transition that occurred at around 400 nm. 5 A waveguide requires elaborate control of the refractive index of materials for long light transmission, and is composed of core and clad layers with different refractive indices. 13,14 Polymeric optical lenses are divided into two types of polymers: one is thermoplastics, such as poly(methyl methacrylate), polycarbonate and cycloolefin polymers for industrial uses, 15 and the second is thermosets, such as polythiols, 16 polyisocyanates 17 and resins from episulfides.…”