【摘要】 通过熔融共混法制备出剥离型乙烯-丙烯酸丁酯共聚物(EBA)/MgAl层状双氢氧化物(LDH)纳米复合材料。采用XRD、透射电镜(TEM)和热重分析(TGA)等技术对纳米复合材料的结构、形貌、热性能及力学性能进行了研究。XRD、FTIR和TEM结果表明,十二烷基单磷酸根离子(PK)嵌入了LDH层间,使LDH的层间距显著增大;在强剪切力作用下,有机化的LDH可在熔融的EBA基体中剥离成纳米片层,均匀地分散在EBA的基体中。随着LDH含量的增加,纳米复合材料的拉伸强度和断裂伸长率先增后降,在LDH的含量为3%和2%时分别达到最大值。当LDH的质量百分含量为2%时,纳米复合材料的热起始分解温度(T10%)相比于纯EBA提高29℃,LDH能够促进EBA成炭。更多还原

【Abstract】 Ethylene-butyl acrylate copolymer(EBA)/MgAl layered double hydroxide(LDH) nanocomposites were synthesized by melt compounding method using laurylether phosphate(PK) ion organically modified layered double hydroxide(LDH-PK).The structure,morphology,thermal properties and mechanical properties of EBA/LDH nanocomposites were researched by X-ray diffraction(XRD),Transmission electron microscopy(TEM) and thermogravimetric analysis(TGA) and so on.XRD results show that the original peak of LDH-PK shift to lower 2θ range and support the formation of exfoliated nanocomposites.TEM micrograph shows the LDH nanolayers are well exfoliated and uniformly dispersed in EBA matrix.The maximum tensile strength and elongation at break of the EBA/MgAl-LDH nanocomposites are found with the LDH content of 3 and 2-wt%,respectively.When the loading of LDH is 2%,the onset temperature(T10%) of nanocomposite is 29 ℃ higher than that of pristine EBA,and LDH nano sheets can promote the char formation of EBA during the thermal degradation.更多还原