| PU/OMMT纳米复合材料的制备与性能研究 |
| Preparation and properties of PU/OMMT nanocomposites |
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| DOI： |
| 中文关键词: 聚氨酯 有机蒙脱土 复合材料 拉伸性能 |
| 英文关键词: PU OMMT composite tensile strength |
| 基金项目:中国工程物理研究院“双百人才”基金资助项目（2004R0802） |
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| 中文摘要: |
| 采用一步法和预聚体法制备聚氨酯（PU）/有机蒙脱土（OMMT）纳米复合材料，研究分散方式对OMMT层间距以及复合材料制备方法和OMMT用量对纳米复合材料拉伸性能的影响。结果表明，采用高速剪切分散法和超声波分散法均可使聚四氢呋喃醚二醇分子链进入OMMT片层间，增大其层间距；预聚体法PU/OMMT纳米复合材料拉伸性能优于一步法复合材料；与PU弹性体相比，当OMMT用量为0.5份时，一步法复合材料的强度和韧性均提高，牌号为DK1N的OMMT用量为7份时，复合材料的拉伸强度提高54%，拉断伸长率提高19.4%，增幅最大。 |
| 英文摘要: |
| The PU/organic montmorillonite(OMMT) nanocomposites were prepared by one-step method and prepolymer method respectively.The influences of the dispersing method of OMMT in polytetrahydrofuran glycol(PTMG)，the addition level of OMMT and the preparing method of composite on the physical properties of nanocomposite were investigated.The results showed that both the high speed shearing dispersing method and the ultrosonic dispersing method could be used to intercalate the molecular chain of PTMG into the gallery between OMMT layers；the tensile strength of PU/OMMT nanocomposite prepared by prepolymer method was higher than that by one step method；the strength and toughness of PU/OMMT nanocomposite prepared by one-step method increased by using 0.5 phr OMMT；and the tensile strength and the elongation at break of nanocomposite increased by 54% and 19.4% respectively by using 7 phr DK1N?OMMT compared to those of PU. |
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