Studies on Non-Flame Properties of Ethylene Vinyl Acetate / Linear Low Density Composites Containing Halogen-Free Organic Flame Retardants.

• Main Authors: Si-Wen Liu, 劉思汶
• Other Authors: Yen-Zen Wang
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/72r64j

碩士 === 國立雲林科技大學 === 化學工程與材料工程系 === 102 === In this study, flame retardant composites were prepared by physical blend method using ethylene-vinyl acetate (EVA), linear low density polyethylene ( LLDPE ), and different contents of halogen free flame retardant. The compatibility between flame retardant and substrate of ethylene-vinyl acetate (EVA), linear low density polyethylene ( LLDPE ) was investigated by FTIR、DSC and FE-SEM. TGA was used to explore the pyrolysis property of the flame retardant composites. The flam retardant property of the composite was tested by LOI and UL-94. The flame retardant mechanism was also investigated by combining the results of EDS and FE-SEM. The mechanic property effect of the different series and content of flame retardants for the composites was also studied. Adding flame retardants to the substrate, the glass transition temperature (Tg) was shifted in the range between the Tg of substrate and that of flame retardant. SEM showed that flame retardant powders were uniformly dispersed in the substrate and no particle aggregation was occurred. The compatibility between the flame retardant and substrate is good. TGA results showed that the first degradation temperature decreased and the char yield increased for the composites with the flame retardant of phosphorus, nitrogen - phosphorus whether it was under taken in nitrogen or air atmosphere. On the other hand, the composites with inorganic magnesium hydroxide flame retardant showed that the first degradation temperature was delayed. This flame retardant could upgrade the thermal stability of composite. The composites with nitrogen - phosphorus had good flame retardant property based on the LOI and UL-94 test. The results of EDS and SEM showed that the content of phosphorus and nitrogen were reduced and the carbon residue was increased on the first degradation temperature for phosphorus and nitrogen - phosphorus composite. The SEM displayed a more compact and tighter structure for the composite with phosphorus and nitrogen-phosphorus. Mechanical test showed that the tensile strength, elongation at break, and Young's modulus were decreased as the flame retardant increased.