Study on the preparation and flame retardance of microencapsulated flame retardant/polyurethane composites

• Main Authors: Jia-Ming Yang, 楊家銘
• Other Authors: Chin-Lung Chiang
• Format: Others
• Language: zh-TW
• Online Access: http://ndltd.ncl.edu.tw/handle/s488be

碩士 === 弘光科技大學 === 職業安全與防災研究所 === 102 === Part 1： A new microcapsuled flame retardant containing ammonium polyphosphate (APP) and 4,4'-Oxydianiline-formaldehyde (OF) resin as core and shell material was synthesized by in situ polymerization technology. The structure and performance of microencapsulated ammonium polyphosphate (OFAPP) were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and water contact angle (WCA). Thermal behavior of OFAPP was systematically analyzed by thermogravimetric analysis (TGA). Flame retardant tests, such as limiting oxygen index (LOI), flammability (UL-94), and smoke density chamber were employed to evaluate the effect of composition variation for the APP and the OFAPP in silanol-terminated polyurethane (Si-PU) composites. The results indicated that the microencapsulation of APP with the OF resin led to an improvement of the hydrophobicity. Results also revealed that the flame retardancy of the Si-PU/OFAPP composite was better than that of the Si-PU/APP composite at the same additive loading.   Part 2： Microencapsulated melamine polyphosphate (OFMPP) with a 4,4'-Oxydianiline-formaldehyde (OF) resin coating layer was prepared by in situ polymerization. OFMPP was characterized by Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and water contact angle (WCA), and so on. The Fire tests of OFMPP and MPP flame retarded silanol-terminated polyurethane (Si-PU) composites were studied by limiting oxygen index (LOI), UL-94, and smoke density test. The LOI value of the Si-PU/OFMPP 30% composite is higher than that of the Si-PU/MPP 30% composite. The UL 94 rating of the Si-PU/OFMPP 30% composite is V-0 at the 30 wt% additive level, whereas Si-PU/MPP gives no rating at the same loading level. Results of the LOI and UL-94 experiment show that OFMPP is an effective flame retardant in Si-PU compared with MPP. Keywords：Microencapsulation, melamine polyphosphate, ammonium polyphosphate, polyurethane, flame retardant