此研究首先將有機黏土以不同比例添加於LDPE泡棉中摻合磷氮系膨脹型阻燃劑製成阻燃級的複合材料,經由LOI、Cone Calorimeter檢測燃燒性質,實驗結果顯示,添加奈米黏土可提高阻燃性質並且可使物料在燃燒時之尖峰釋放率和遮煙係數明顯降低。以上結果均顯示,添加奈米有機黏土不僅可提升熱安定性,對於阻燃性也有所提升,並且在燃燒過程中會使焦炭層膨脹的更完整,更能夠降低發熱量,能有效的阻隔氧氣及熱傳遞之輔助功效。 並將奈米黏土以不同比例添加於EVA(乙烯-醋酸乙烯酯共聚物Ethylene Vinyl Acetate copolymer)中,成為EVA/clay奈米複合材料,並經由XRD、TEM檢測顯示,可知奈米黏土呈現脫層型態於EVA中,熱重損失測試(TGA)也顯示,添加奈米黏土於EVA的熱性質隨著奈米黏土添加量增加而有所提升。再經由Cone Calorimeter檢測燃燒性質,實驗結果顯示,添加奈米黏土可使尖峰釋放率明顯降低。
The main objective of this study was to investigate the effect of organoclay addition on thermal and fire properties of low density polyethylene (LDPE) foam and Ethylene Vinyl Acetate copolymer (EVA). Nanoclay、P-N type intumescent flame retardant、cross-linking agent and blow agent have been mixed with LDPE to prepare flame-retarded LDPE foam. LOI and cone calorimeter (CONE) experiments showed that the presence of organoclay in the flame-retarded LDPE foam was not only improve its thermal stability but also reduce its maximum heat release rate and extinction coefficient. EVA/CLAY hybrids have been prepared by melt-blending. The exfoliated structures of clay in the hybrid were characterized by XRD and TEM. TGA and cone calorimeter data shown that nanoclay improve the degradation pathway and also improve its thermal stability.