Diffused Reflection Performance of Microcellular Foamed Polyethylene Naphthalate

作者：Han Earl^*; Choi Seokwon; Cha Sung Woon

来源：Polymer - Plastics Technology and Engineering, 2013, 52(13): 1285-1289.

DOI：10.1080/03602559.2012.762021

• Batch process
• Cell morphology
• Diffusion reflectivity
• Microcellular foaming process
• Polyethylene naphthalate (PEN)

Due to the increasing demand for high-performance diffuse reflectors in applications including LCD displays and lighting, many studies on the manufacturing of high-performance reflectors have been conducted. Microcellular foamed plastics are characterized as having a structure with a cell size of 10 mu m or less along with a cell density of at least 10(9) cells/cm(3). Since the structural characteristics of these materials were determined to result in diffused reflection, the use of polymers as diffuse reflectors has been studied. In this study, a diffuse reflector specimen was manufactured by applying a microcellular foaming process to polyethylene naphthalate (PEN). The optimum foaming conditions of PEN were determined through preliminary experiments using the Batch process and the specimen was manufactured using supercritical CO2. Additionally, to improve the low productivity, which is one of the disadvantages of the Batch process, additional specimens were manufactured while varying the saturation conditions. Through observation of the cross-sections of the specimens, the cell morphology depending on the process conditions was confirmed and then, the diffusion reflectivity was measured.

• 出版日期2013-10-21