| 片层硅酸盐纳米复合聚氨酯橡胶的结构及性能 |
| The structure and properties for polyurethane rubber/layered silicate nanocomposites |
| 投稿时间：2015-04-15 修订日期：2015-04-15 |
| DOI： |
| 中文关键词: 聚氨酯脲 片层硅酸盐 纳米复合 结构 性能 |
| 英文关键词: polyurethane rubber layered silicate nanocomposites structure properties |
| 基金项目:国家自然科学基金(21176126)资助项目 |
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| 摘要点击次数: 1046 |
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| 中文摘要: |
| 将聚四氢呋喃二醇和富羟基活性蒙脱土(HMMT)进行预混插层处理,然后与甲苯二异氰酸酯(TDI)进行反应,得到层状硅酸盐复合预聚体。随后预聚体与扩链剂(DMTDA)反应制备出聚氨酯橡胶/片层硅酸盐纳米复合材料。采用材料拉伸机、X射线衍射(XRD)、透射电镜 (TEM)、差示扫描量热仪 (DSC)和热失重分析仪 (TGA) 等检测设备对聚醚型聚氨酯脲的结构与性能进行分析。结果表明：当PMMT的质量百分含量在2％时,片层硅酸盐粒子在聚氨酯基体内分散较均匀,形成了以剥离型为主、插层型为辅的复合型结构,聚醚型聚氨酯脲复合材料的拉伸强度比纯PUU提高了21%,断裂伸长率提高了12%,PUU复合材料的玻璃化转变温度(Tg)提高了5.8℃,第一失重区分解温度和最高分解温度高出纯聚氨酯17.33 ℃和13.94 ℃。无机纳米片层硅酸盐粒子的存在,聚氨酯橡胶的强度、韧性和热稳定性均得到改善。 |
| 英文摘要: |
| PTMG and HMMT were mixed to get organic-inorganic hybrid polymer polyol, and the clay composed prepolymer was prepared by reaction of the hybrid polymer polyol with TDI. Then, the Polyuretahne rubber/layered silicate nanocomposites were prepared by the reaction of the resultant prepolymer with extender. The properties and structure of PUU/layered silicate nanocomposites were respectively characterized by strain-stress machine, XRD,TEM,DSC,TGA. The results showed that when the PMMT content was about 2wt%, laminated silicate particles were uniformly dispersed in polyurethane rubber matrix, and the exfoliation and intercalated composite structure were got. And the tensile strength and elongation at break of PUU composite increased 21% and 12% respectively. Moreover, the glass-transition temperature (Tg) of PUU composites increased by 5.8℃, the first weight loss temperature and high decomposition temperature were higher than that of pure PUU 17.33 ℃ and 13.94 ℃. Due to the existence of inorganic nano laminated silicate particles, the tensile strength, toughness and thermal stability of PU rubber were improved. |
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