Mang Jiyoung, Han Mijeong
Advanced Materials Division, Korea Research Institute of Chemical Technology, 100, Jang-dong, Yuseong-gu, Daejeon, 305-600, Korea.
J Nanosci Nanotechnol. 2010 Jan;10(1):211-6. doi: 10.1166/jnn.2010.1492.
Isobutylene-isoprene rubber (IIR)/organically modified montmorillonite (OMMT) nanocomposites were prepared by both melt-compounding and solution process. Organic modifiers were synthesized by the reaction of allyl bromide and alkyl amines to modify sodium montmorillonite (Na+ -MMT). After modification of Na+ -MMT with organic modifiers, the changes of d-spacing of OMMT were studied by X-ray diffraction (XRD). XRD patterns revealed that the d-spacing of Na+ -MMT increase from 1.1 nm for Na+ -MMT to 2.18 nm for the OMMT, indicating intercalation of organic modifier into the interlayers of montmorillonites. Mechanical properties of IIR/OMMT nanocomposites were studied by means of tensile measurements. Tensile strengths of IIR/OMMT nanocomposites prepared from melt-compounding and solution process were higher than those of IIR/Na+ -MMT nanocomposites and pristine IIR. When the solution process was used, IIR/OMMT nanocomposites provided further improvement in mechanical properties, as compared to those prepared from melt-compounding, indicating the better interaction between IIR and OMMT.
采用熔融共混和溶液法制备了异丁烯-异戊二烯橡胶（IIR）/有机改性蒙脱土（OMMT）纳米复合材料。通过烯丙基溴与烷基胺反应合成有机改性剂，用于改性钠基蒙脱土（Na + -MMT）。用有机改性剂对Na + -MMT进行改性后，通过X射线衍射（XRD）研究了OMMT的d间距变化。XRD图谱表明，Na + -MMT的d间距从Na + -MMT的1.1 nm增加到OMMT的2.18 nm，表明有机改性剂插入了蒙脱土的层间。通过拉伸测量研究了IIR/OMMT纳米复合材料的力学性能。通过熔融共混和溶液法制备的IIR/OMMT纳米复合材料的拉伸强度高于IIR/Na + -MMT纳米复合材料和原始IIR。与通过熔融共混制备的复合材料相比，采用溶液法制备的IIR/OMMT纳米复合材料的力学性能有进一步提高，表明IIR与OMMT之间具有更好的相互作用。
