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黏土/天然橡胶纳米复合材料的制备及性能 总被引:14,自引:1,他引:13
利用乳液插层法制备了黏土/天然橡胶纳米复合材料,研究了该复合材料的力学性能、应力应变行为、耐磨性、气体阻隔性和耐老化性能。结果表明,黏土/天然橡胶纳米复合材料与高耐磨炭黑(N330)、白炭黑增强橡胶相比,邵尔A型硬度、定伸应力和撕裂强度较高,拉伸强度相当。黏土、N330以及白炭黑对天然橡胶的拉伸结晶有影响,填料用量对材料拉伸强度的影响存在最佳值。黏土/天然橡胶纳米复合材料具有良好的耐磨性、气体阻隔性和耐老化性能。 相似文献
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将有机黏土(OC)分别加入到天然橡胶(NR)、丁苯橡胶(SBR)、丁基橡胶(IIR)和三元乙丙橡胶(EPDM)中,通过熔体法制备了纳米复合材料。探讨了橡胶黏度及其分子结构对OC在复合材料中分散状况的影响,研究了复合材料的力学性能。结果表明,在以NR为基体的复合材料中。OC片层分散均匀,且剥离程度较高;在SBR,IIR,EPDM中,OC以插层结构为主,且插层效果从大到小的顺序依次为SBR,IIR,EPDM。与相应的纯胶相比,OC/NR纳米复合材料的定伸应力提高,拉伸强度和扯断伸长率有所下降;OC/SBR,OC/IIR,OC/EPDM纳米复合材料的定伸应力变化不大,拉伸强度和扯断伸长率明显提高,且OC/SBR和OC/EPDM复合材料的撕裂强度提高。 相似文献
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以聚苯乙烯(PS)低聚物为相容剂,用熔体插层法制备SBR/有机蒙脱土(OMMT)纳米复合材料,并对其结构及性能进行研究。结果表明,PS大分子能够插入OMMT层间形成复合物;采用熔体插层法使PS/OMMT纳米复合物在SBR基体中实现纳米级分散,可间接实现OMMT在SBR基体中的纳米级分散;当填充5份OMMT时,SBR/OMMT纳米复合材料具有较好的物理性能。 相似文献
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对蒙脱土(MMT)进行了有机化改性,采用乳液插层法制备了丁苯橡胶(SBR)/有机蒙脱土(OMMT)纳米复合材料,用透射电子显微镜、X射线衍射法对OMMT及复合材料进行了表征,研究了复合材料的物理机械性能及动态力学性能.结果表明,MMT的层间距为1.47 nm,OMMT的层间距增大到2.94 nm;OMMT片层均匀分散在SBR基体中,具有良好的界面相容性;随着OMMT用量的增加,SBR/OMMT纳米复合材料的物理机械性能明显改善,且具有低填充量高增强效果的特点;SBR/OMMT纳米复合材料具有与SBR/炭黑N 330复合材料相当的抗湿滑性能,同时具有更小的滚动阻力. 相似文献
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采用熔融插层法制备蒙脱土/SBR纳米复合材料,并研究其阻燃性能。结果表明,SBR大分子不能有效插入钠基蒙脱土(Na—MMT)片层间,而能有效插入有机蒙脱土(OMMT)片层间,形成插层型纳米复合材料;将OMMT与高抗冲聚苯乙烯(HIPS)制成阻燃母粒能进一步提高SBR的插层效果。OMMT可以明显改善复合材料的阻燃和抑烟性能,随着OMMT用量的增大,复合材料的热释放速率、峰值热释放速率、平均热释放速率、总热释放和总生烟量先明显降低然后趋于稳定;HIPS-OMMT阻燃母粒可以明显改善复合材料阻燃性能,但对抑烟性能的改善效果不如OMMT。 相似文献
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黏土/SBR纳米复合材料的加工性能 总被引:6,自引:1,他引:6
采用橡胶加工分析仪(RPA)和孟山都毛细管流变仪研究了黏土/SBR纳米复合材料的Payne效应和流变性能。并同炭黑(N330)与微米级黏土橡胶复合材料进行了对比。结果表明,黏土/SBR纳米复合材料的流变规律与传统填充体系的流变规律类似,其弹性模量均随着填料用量的增加而增大,填料之间形成拟网络结构,在加工过程中,具有Payne效应;纳米分散的黏土具有更大的宽厚比和各向异性,对橡胶分子链限制作用更强。网构化程度更高,在相同的应变和频率下,与炭黑和黏土直接混炼填充SBR体系相比,黏土/SBR纳米复合材料的弹性模量更高;纳米化程度越高,网构化程度也越高;在相同的毛细管剪切速率下,黏土/SBR纳米复合胶料的黏度略高于炭黑体系;在黏土/SBR纳米复合胶料中,加入界面剂改善界面强度和改进工艺增加增强单元数目,胶料弹性模量提高;黏土/SBR纳米复合胶料具有出口膨胀小.吃粉快。挺性好的良好加工性能。 相似文献
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乳液共沉法丁苯橡胶/有机蒙脱土纳米复合材料在轮胎胎面中的应用 总被引:1,自引:0,他引:1
用乳液共沉法在中试装置上制备了丁苯橡胶/有机蒙脱土(SBR/OMMT)乳液共沉胶,研究了纳米复合材料的微观结构、力学性能、磨耗性能、加工性能等,讨论了其替代SBR在半钢子午线轮胎胎面中的应用效果.透射电子显微镜观察表明制备的乳液共沉胶是一种插层型纳米复合材料,OMMT与橡胶基质结合得较好;乳液共沉胶的拉伸强度、撕裂强度、硬度、回弹性等与SBR 1502基本相当,扯断伸长率和压缩永久变形有所增大,耐磨耗性能大幅度提高;以乳液共沉胶替代SBR 1502及部分炭黑在半钢子午线轮胎胎面中的应用效果良好,胶料的力学性能、加工性能及成品胎性能均能满足工业生产要求. 相似文献
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Rasha M. Mohamed 《Journal of Industrial and Engineering Chemistry》2013,19(1):80-86
Nanocomposites of two different kinds of rubber (acrylonitrile-butadiene rubber NBR and styrene butadiene rubber SBR)/organo-montmorillonite nanocomposites modified by hexadecyltrimethyl ammonium bromide were prepared by the reactive mixing intercalation method in the presence of trimethylolpropane trimethylmethacrylate (TMPTMA). The influence of gamma irradiation on the morphology and properties of the rubber nanocomposites was investigated. Intercalated polar or unsaturated matrices (e.g., NBR and SBR)/OMMT nanocomposites can be obtained, which was confirmed by X-ray diffraction (XRD). The clay layers could be uniformly dispersed in the rubber matrix on the nanometer level. Mechanical tests showed that the nanocomposites had good mechanical properties as compared to the neat composites. The results also showed that the irradiated NBR/OMMT nanocomposites had higher thermal stabilities than irradiated SBR/OMMT nanocomposites. 相似文献
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有机蒙脱土对天然橡胶/丁苯橡胶的补强及增容作用 总被引:1,自引:0,他引:1
采用机械混炼法制备了天然橡胶(NR)/丁苯橡胶(SBR)/有机蒙脱土(OMMT)纳米复合材料,采用TEM和XRD对复合材料的亚微观结构进行了表征,并对复合材料的表观交联密度、静态力学性能、动态力学性能和硫化热效应进行了研究。结果表明,复合材料为剥离型纳米复合材料;OMMT能够明显提高纳米复合材料的交联密度和静态力学性能;OMMT导致NR/SBR共混胶动态损耗因子降低,并且能够促使NR和SBR玻璃化转变温度更为接近,起到了增容作用;OMMT实现了NR和SBR两相的同步硫化。 相似文献
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Jineesh Ayippadath Gopi Sanjay Kumar Patel Arup Kumar Chandra Deba Kumar Tripathy 《Journal of Polymer Research》2011,18(6):1625-1634
Styrene butadiene rubber-organoclay nanocomposites were prepared with Cloisite 15A via melt intercalation. X-ray diffraction
and transmission electron microscopy indicated that the nanostructures are partially exfoliated and intercalated. The nanocomposites
exhibited great improvements in tensile strength and tensile modulus. The incorporation of organoclay gave rise to considerable
reduction of tan delta and increase in storage modulus in the rubbery region. It is shown that after 6 phr (parts per hundred
rubber) clay loading there is not much increase in the properties. The effect of carbon black (N330) on mechanical properties,
dynamic mechanical properties, heat build up, abrasion resistance in the nanocomposites having the optimized clay level (6
phr) was investigated. Optimum results were obtained with the addition of 25 phr carbon black. For comparison with the 6phr
nanoclay and 25phr N330 (high abrasion furnace carbon black) filled SBR composites, 40 phr N330 filled SBR composites was
used. The 6phr organoclay and 25phr N330 filled SBR nanocomposite showed better properties than 40phr carbon filled SBR compound.
These results indicate that 6phr organoclay can be replaced by 15 phr carbon black from the conventional SBR-carbon black
based tire tread compounds. The Dynamic mechanical analyzer (DMA) results revealed that the new tire tread compound gives
better rolling resistance and comparable wet grip resistance and lower heat build up than that of conventional tread compound. 相似文献
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Poly(vinyl chloride) (PVC)/organophilic‐montmorillonite (OMMT) nanocomposites were prepared by direct melt intercalation. PVC/compatibilizer ((vinyl acetate) copolymer (VAc))/OMMT nanocomposites were also prepared by melt intercalation by a masterbatch process. The effect of OMMT content on the nanostructures and properties of nanocomposites was studied. The nanostructures were studied by wide angle X‐ray diffraction (WAXD) and transmission electron microscopy (TEM). The linear viscoelastic properties and dynamic mechanical properties of PVC/OMMT nanocomposites were also investigated by an advanced rheometric expansion system (ARES) rheometer. The results showed that partially exfoliated and partially intercalated structures coexisted in the PVC/OMMT and PVC/VAc/OMMT nanocomposites. The mechanical properties test results indicated that the notched Charpy impact strengths of nanocomposites were improved compared to that of pristine PVC and had a maximum value at 1 phr OMMT loadings. The compatibilizer could further improve the impact strengths. But the existence of OMMT decreased the thermal stability of PVC/OMMT and PVC/VAc/OMMT nanocomposites. The linear viscoelastic properties test results indicated the dependence of G′ and G″ on ω shows nonterminal behaviors, and they had better processibility compared with pristine PVC. However, the glass transition temperatures of PVC/OMMT nanocomposites almost had little change compared to that of pristine PVC. POLYM. COMPOS., 27:55–64, 2006. © 2005 Society of Plastics Engineers 相似文献
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熔融插层法制备聚乳酸/有机蒙脱土纳米复合材料及其性能研究 总被引:1,自引:0,他引:1
袁龙飞;甄卫军;刘月娥;庞桂林;宋晓玲;黄东;贺盛喜 《中国塑料》2009,23(7):34-38
以新疆地产蒙脱土和聚乳酸为原料,通过熔融插层的方法制备了聚乳酸(PLA)/有机蒙脱土(OMMT)纳米复合材料。分别采用X射线衍射仪、扫描电子显微镜、透射电子显微镜、热重分析仪等对复合材料的微观结构、形貌及热稳定性进行了表征和分析。研究表明,PLA大分子链已经插入OMMT片层间,层间距明显增大,形成PLA/OMMT纳米复合材料,体系的相容性良好。PLA/OMMT纳米复合材料的热失重曲线移向高温端,其热分解温度提高。PLA/OMMT纳米复合材料的熔点、维卡软化点、冲击强度、拉伸强度、热稳定性均比PLA基体有明显的提高。PLA/OMMT纳米复合材料的降解性初步研究表明其是一种良好的生物可降解环保塑料。 相似文献
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采用熔体插层法制备有机蒙脱土(OMMT)/BIIR纳米复合材料.结果表明,OMMT/BIIR纳米复合材料是有序插层型纳米复合材料,在OMMT用量(0~15份)较小的情况下,其物理性能随着OMMT用量的增大明显提高;与BIIR胶料相比,其气密性优异. 相似文献
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采用溶液插层法与双辊混炼法制备了顺丁橡胶/炭黑/有机蒙脱土(BR/CB/OMMT)纳米复合材料,用透射电子显微镜(TEM)以及X射线衍射(XRD)方法对复合材料的亚微观结构进行了表征,并研究了复合材料的力学特性、耐磨耗性能以及硫化特性。结果表明:BR/CB/OMMT为插层型纳米复合材料;在OMMT含量小于4份时,BR/CB/OMMT纳米复合材料具有优异的力学性能和耐磨耗性能;OMMT起到了硫化促进剂的作用,降低了BR的焦烧时间(TS)和正硫化时间(T90);低填充量OMMT可提高复合材料的交联密度。 相似文献