共查询到19条相似文献,搜索用时 62 毫秒
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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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利用独创的粘土晶层/胶乳纳米互穿技术获得了粘土/NBR纳米复合材料。通过X光衍射、透射电子显微镜证实和分析了其纳米分散相结构。物理性能的研究结果表明,当粘土用量较小时,复合材料的拉伸强度便达到了一个较高的水平,且远高于炭黑N330补强胶料的水平。复合材料的定伸应力随粘土用量的增大而直线上升,耐磨性迅速提高。当粘土用量达到20份时,复合材料的气密性优于用CIR制造的无内胎子午线轮胎气密层胶料。 相似文献
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研究粘土 /SBR及粘土 /NR纳米复合材料的耐热氧老化和耐臭氧老化性能 ,并考察粘土 /SBR纳米复合材料的热失重和气体阻隔性。结果表明 ,粘土 /SBR纳米复合材料的耐热氧老化和耐臭氧老化性能均优于炭黑 /SBR复合材料 ;粘土 /NR纳米复合材料的耐热氧老化性能略优于炭黑 /NR复合材料 ,耐臭氧老化性能与炭黑 /NR复合材料相差不大 ;均匀分散的纳米粘土可提高橡胶的热稳定性和气体阻隔性 ,减缓氧及臭氧在橡胶中的扩散 ,降低橡胶分子链受攻击的几率 ,有利于提高橡胶耐热氧老化和耐臭氧老化性能 相似文献
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粘土/NBR纳米复合材料的结构与性能研究 总被引:3,自引:0,他引:3
采用共絮凝粘土水悬浮液与NBR胶乳共混的方法制备了粘土/NBR纳米复合材料。透射电子显微镜观察表明粘土具有平面取向的纳米分散结构;X光衍射测试表明复合材料中还存在一定量的粘土片层聚集体;随着粘土用量的增大,复合材料的邵尔A型硬度、100%定伸应力、300%定伸应力、拉伸强度和扯断永久变形增大,扯断伸长率变化不大;粘土/NBR纳米复合材料的耐老化性能略优于白炭黑/NBR硫化胶;粘土可提高复合材料的气体阻隔性能,但对复合材料的氧指数影响不大。 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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粘土/丁苯橡胶纳米复合材料的制备和性能 总被引:55,自引:4,他引:55
通过两种方法制备了粘土均匀分散于橡胶中的纳米复合材料。电子显微镜显示粘土以单层和多层的形式分散于橡胶基体中,X-光衍射显示了粘土的晶层间距得到扩充,粘土层间插入了高分子。纳米复合材料具有与用炭黑补强的材料同样的良好性能。 相似文献
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Sagheer Gul Bakhtiar Muhammad Saira Jabeen 《Polymer-Plastics Technology and Engineering》2016,55(7):684-703
This review covers significant properties and applications of nanoclays in polymer-based nanocomposites with special emphasis on future potential. Various strategies have been adopted for nanocomposite synthesis including delamination of nanoclays through melt shearing, in situ polymerization, and sol–gel method. Proper dispersion of nanoclay results in improved properties of bulk polymer (thermal stability, mechanical strength, gas barrier, and flame retardancy). Light weight, low cost, and improved physical properties of polymer/clay materials increase their demand in modern material industries (aerospace, automobile, barrier materials, construction, and biomedical). Due to extensive use of these nanocomposites in technical fields, there are still many stones left unturned. 相似文献
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Poly(dimethylsiloxane)/clay nanocomposite membranes have been synthesized and mass transport properties through those nanocomposite membranes have been investigated. The effect of mechanical deformation on the transport properties of the PDMS (nanocomposite) membranes has also been studied. With the introduction of clay particles into the polymer matrix, mass transport is reduced, likely due to the longer diffusion path, which slows the diffusion process. The effect of membrane extension on diffusion is more complicated. Under small deformation, the permeation flux decreases, but under high deformation, it shows an enhanced diffusion. As the clay particle concentration increased, the effect of external deformation is reduced, and an enhanced diffusion is observed. 相似文献
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溴化丁基橡胶性能研究 总被引:21,自引:0,他引:21
溴化丁基橡胶是卤化丁基橡胶系列之一,它除了保持丁基橡胶的特性外,还增添了许多优点,如硫化速度快,加工工艺性能好,硫化方式多样化等等。通过对大量实验数据进行的对比,叙述了溴化丁基橡胶各种硫化体系的特点。介绍与多种橡胶的并用情况。以改善和提高多种性能的要求。同时,文中还论述了溴化丁基再生胶的实用价值。 相似文献
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采用机械混炼法制备了溴化丁基橡胶/天然橡胶/有机蒙脱土(BIIR/NR/OMMT)纳米复合材料,并对其结构与性能进行了表征。扫描式电子显微镜(SEM)研究表明,OMMT片层均匀地分散在橡胶基体中。这种纳米复合材料具有优异的力学性能和耐油性能。OMMT对纳米复合材料的耐寒性能没有影响,添加OMMT之后,该纳米复合材料的起始分解温度略有降低,失重区域明显移向高温一侧。 相似文献
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To understand the effect of the percolated clay network structure formed by the exfoliated clay layers in nanocomposites, the clay network structure in nylon‐6‐based nanocomposites is characterized using TEM and FFT analyses. A MMT volume fraction between 0.013 and 0.014 is the percolation threshold for strong network formation. The volume spanning MMT network leads to a very high flow activation energy as compared with that of neat nylon 6, resulting in the pseudo‐solid like response under molten state in N6CNs. A canonical NVT‐MD simulation was conducted in the system made up by nylon 6 molecules/Si(OH)4 molecules. The formation of the strong interfacial interaction between nylon 6 molecules and Si(OH)4 molecules induced by OH groups is suggested.