采用熔融接枝与熔融插层相结合的方法,成功制备了纳米OMMT/EVA-g-PU复合材料.通过FTIR及13C NMR测试表明,端-NC0的聚氨酯(PU)预聚体与皂化乙烯-醋酸乙烯酯共聚物(EVA)间发生接枝反应.采用X射线衍射仪(XRD)与透射电镜(TEM)观察了蒙脱土(OMMT)在基体中的分散状态,用电子万能试验机、动态力学分析仪(DMA)和热重分析仪(TG)分析了复合材料的力学性能、储能模量和热性能.结果表明:OMMT主要以插层型分布在基体中;当OMMT的质量分数为3%时,复合材料的断裂强度、杨氏模量和撕裂强度分别为7.96 MPa、7.12 MPa和49.97 MPa;复合材料的储能模量随OMMT含量的增加而升高,当OMMT的质量分数为7%时,复合材料的储能模量相对于纯EVA提高了2倍多;复合材料的热稳定性能也要优于纯EVA,并随OMMT含量的增加而升高.
参考文献
| [1] | 刘平生,李利,周宁琳,等.蒙脱土/聚丙烯酸高吸水性树脂的合成[J].复合材料学报,2006,23(3):44-48.Liu Pingsheng,Li Li,Zhou Ninglin,et al.Synthesis of montmorillonite/poly(acrylic acid) super absorbent resin[J].Acta Materiae Compositae Sinica,2006,23(3):44-48. |
| [2] | Ray S S,Okamoto M.Polymer/layered silicate nanocomposites:A review from preparation to processing[J].Progress in Polymer Science,2003,28(5):1539-1641. |
| [3] | Mantia F P,Dintcheva N T.EVA copolymer-based nanocompositesz Rheological behavior under shear and isothermal and non-isothermal elongational flow[J].Polymer Testing,2006,25(4):701-708. |
| [4] | Pramanik M,Srivastava S K,Samantaray B K.Preparation and properties of ethylene vinyl acetate-clay hybrids[J].Journal of Materials Science Letters,2001,20(8):1377-1380. |
| [5] | Kim H I,Park S M.Preparation and properties of microcapsule with EVA core-PU shell structure[J].Journal of Applied Polymer Science,2007,103(7):893-902. |
| [6] | Brandolini A J,Hills D D.NMR spectra of polymers and polymer additives[M].New York:Marcel Dekker Inc,2000:174-264. |
| [7] | Tian Y,Yu H,Wu S S,et al.Study on the structure and properties of EVA/clay nanocomposites[J].Journal of Materials Science,2004,39(12):4301-4303. |
| [8] | 沈效峰,钱钟钟,张伟安,等.熔融法制备EVA/OMMT纳米复合材料及其热性能和动态力学性能[J].应用化学,2004,21(10):1042-1045.Shen Xiaofeng,Qian Zhongzhong,Zhang Weian,et al.Thermal properties and dynamic mechanical behavior of poly(ethylene-co-vinyl acetate)/montmorillonite nanoeomposites prepared by melt-blending[J].Chinese Journal of Applied Chemistry,2004,21(10):1042-1045. |
| [9] | Zhang W A,Chen D Z,ghao Q B,et al.Effects of different kinds of clay and different vinyl acetate content on the morphology and properties of EVA/clay nanocomposites[J].Polymer,2003,44(11):7953-7961. |
| [10] | Marcilla A,Gomcz A,Menargues S.TG/FTIR study of the thermal pyrolysis of EVA copolymers[J].Journal of Analytical and Applied Pyrolysis,2005,74(2):224-230. |
| [11] | ghang G B,Ding P,Zhang M,et al.Synergistic effects of layered double hydroxide with hyperfine magnesium hydroxide in halogen-free flame retardant EVA/HFMH/LDH nanocomposites[J].Polymer Degradation and Stability,007,92(6):1715-1720. |
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