Optical characteristics of injection-molded fluorene polymers
-
Mariko Kato
and
Hiroshi Ito
Abstract
Digital cameras are small, but they must be able to take images with numerous pixels. To use few lenses in devices, aspheric lenses have been used. Fluorene-based polymers (FBPs) have a high refractive index and low birefringence. Because optical lenses must be manufactured as designed with low optical retardation, FBP optical lenses are widely used. This study assessed optical and flow characteristics of polycarbonate (PC) and two kinds of FBP. Molded specimen characteristics of PC and two FBPs revealed these properties of the FBPs. The results show that the unique structure of FBPs eliminated birefringence, because of the cardo structure part, including the fluorene ring. Differences in optical properties are attributable to structural differences of the part which is polymerized with the fluorene structure (the X part). The temperature dependence of FBPs in the flow characteristics and optical properties was smaller than that of PC; the slight temperature dependence is particularly obvious above the glass transition temperature (Tg). The benzene ring content of FBP affects the resin optical and physical properties. The influence of the difference between the fluorene polyester structure and the PC structure was greater than that of the benzene ring content in the X part, in the molecular structure of FBP.
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©2013 by Walter de Gruyter Berlin Boston
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- Optical characteristics of injection-molded fluorene polymers
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Articles in the same Issue
- Masthead
- Masthead
- Original articles
- Heat distortion temperature of PPS/PC blend, PPS/PC nanocomposite and PPS/PC/GF hybrid nanocomposite
- Mechanical and thermal properties of impact modified PBT blends and impact modified PBT nanocomposites
- Twin screw extrusion with Expancel foaming agent
- Facile synthesis of new thermally stable and organo-soluble polyamide-imides from phosphorus-containing aromatic amines and various dianhydrides
- Graft copolymerization of poly(vinyl acetate) onto starch using KMnO4-H2SO4 redox system
- Synthesis and properties of polysiloxane graft waterborne polyurethane modified with α-N,N-dihydroxyethylaminopropyl-ω-butylpolydimethylsiloxane
- Thermal, mechanical and tribological properties of polycarbonate/acrylonitrile-butadiene-styrene blends
- Thermal conductivity and electrical conductivity of silicone rubber filled with aluminum nitride and aluminum powder
- Individual and combined effects of modified starch, bentonite and their composite powder with HPMC on the performance of cement mortars
- Optical characteristics of injection-molded fluorene polymers
- Novel epoxy resin composites containing polyaniline coated short kenaf bast fibers and polyaniline nanowires: mechanical and electrical properties
