A Study on optical performance of Polycarbonate plate containing optical diffused particles

• Main Authors: Zong-Yan Lee, 李宗彥
• Other Authors: Hsien-Tang Chiu
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/92qde5

碩士 === 國立臺灣科技大學 === 材料科學與工程系 === 105 === The aim of this research is to discuss the optical diffuser (OD) for Polycarbonate matrix. It is mainly divided into two systems (PMMA; Silicone resin) and the optical effect of light diffusing plate is mainly related to the matrix and optical diffuser. The influence of the parameters on the optical properties was investigated by scanning electron microscopy (SEM), haze meter and so on. The method of mixing the matrix plastic particles with the light diffuser adopts the twin-screw extrusion mixer, and the light diffusing plate is produced by the injection molding method. It is known that the processing conditions and methods for satisfying the physical properties required for the use of the light diffusing plate are used to perform the physical and optical specimens. In order to know the physical properties of the light diffusion plate, different tests were carried out. According to the standards ASTM D256-10, ASTM D638-02a and ASTM D790; as follows: Tensile Strength, Elongation, three-point bending strength, and Izod impact strength; in the optical side is the illumination and angle of view.The experimental results show that the smaller the average particle size of OD in the same weight ratio, the higher the volume fraction of OD in the light diffusion plate. Hence, the higher the probability that the light is encountered when passing through the diffuser plate, the greater the angle that is finally refracted, increasing the viewing angle (AoV), haze (HAZE) If the difference between the refractive index of the powder and the matrix is greater, the angle(AoV) and HAZE is larger. The addition of the amount and the thickness of the plate affect the overall effect of the shielding of the particles, the shielding effect will increase with these two factors increase, so that the light diffusion effect is better.