摘要
利用熔融插层和双羟基甲基十二烷基氯化铵插层剂改性黏土的方法,制备了三元乙丙橡胶/黏土纳米复合材料。X射线衍射(XRD)和透射电镜(TEM)的测试结果表明,形成的纳米复合材料为剥离型。探索了制作该纳米复合材料的最佳工艺方法。研究了这种材料的力学性能及老化性能,分析了该有机黏土增强橡胶的机理。结果表明,在对黏土进行有机改性时,插层剂中的双羟基与黏土中的氧原子形成了氢键,而使黏土层间的相互作用减弱,层间距增大,使三元乙丙橡胶(EPDM)分子链插入黏土层间而导致黏土剥离是该纳米材料形成的主要原因。有机黏土用量为15份时,试样的拉伸强度高达24.9MPa,扯断伸长率为666%;前者比纯EPDM提高了3～4倍,后者上升了140%。试样的撕裂强度也有明显的改善,而邵尔A型硬度却随有机黏土用量的增加没有明显的变化。同时,试样的耐热老化性能也有了明显的改善。
EPDM/clay nanocomposites were successfully prepared via a melt process using a novel kind of intercalating agent with hydroxyl groups. The experimental results of XRD and TEM indicated that the silicate layers of the clay were intercalated or exfoliated into the EPDM matrices. The tensile strength and the elongation at break of the EPDM/ clay composites loading 15 phr of the organic clay reached 24.9 MPa and 666%, respectively. The values of the composites exhibited 3 to 4 times higher compared to those of gum EPDM vulcanizate. The aging coefficient of the tensile strength, elongation at break, tear strength and the shore A hardness increased with the increase of the organic clay loading.
出处
《合成橡胶工业》
EI
CAS
CSCD
北大核心
2003年第4期226-229,共4页
China Synthetic Rubber Industry
基金
国家自然科学基金资助项目(59973011)
关键词
黏土
三元乙丙橡胶
有机插层剂
纳米复合材料
微观结构
性能
Aging of materials
Blending
Clay
Hot melt adhesives
Nanostructured materials
Synthetic rubber
