摘要
根据"功能化"有机蒙脱土概念,采用磁力搅拌和超声搅拌两种不同的搅拌方法,分别制得了插层型和剥离型聚苯乙烯纳米复合材料。XRD和TEM测试结果显示,通过超声方法制得的聚苯乙烯复合材料具有很好的分散性,并且具有完全剥离的结构。另外,根据蒙脱土中Fe3+对复合材料中聚合物质子驰豫大小的影响,利用固体NMR质子弛豫的计算方法定量表征了聚苯乙烯纳米复合材料中有机土的分散性。结果证明,随着有机土在聚合物中的分散度增加,质子弛豫时间(T1H)逐渐减小。同时,通过NMR质子驰豫时间测量得到的结果和电镜结果相吻合。
Based on ＂functional montmorillonite＂ concept, intercalated and exfoliated polystyrene nanocomposites were prepared by magnetism mixing and ultrasonic mixing. The XRD and TEM results show that ultrasonic mixing favors the dispersion of organic-clay in polystyrene, and well-exfoliated polystyrene nanocomposites can be prepared. Based on the paramagnetic effect of Fe^3＋ in the MMT layers on the relaxation time of protons （T1^H）, the exfoliation degree of the nanocomposites were investigated by proton relaxation experiments. The NMR result proves that T1^H decreases with the clay dispersion degree increasing and the dispersion degree of organic-clay in the polymer can be determinated by the T1^H values quantitatively. The NMR relaxation result is in good agreement with the TEM result.
出处
《功能高分子学报》
CAS
CSCD
北大核心
2010年第4期380-384,共5页
Journal of Functional Polymers
基金
国家自然科学基金项目(10947162)
河南省教育厅自然科学研究项目(2010B1500204)
