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用黏土/天然橡胶纳米复合材料代替部分进口天然橡胶和炭黑制备抗崩花掉块和耐破坏的高性能的矿山轮胎胎面胶。结果表明,纳米黏土基本不影响胶料的硫化性能;纳米黏土构建网络结构的能力较强,Payne效应明显,黏土复合体系的混炼胶具有较好的挺性,硫化胶具有较高的硬度和定伸应力;纳米黏土片层能够沿外力方向取向并诱导高分子链取向,黏土复合体系的断裂伸长率较高,拉伸强度和撕裂强度较大,生热较高,同时纳米黏土的片层结构能够钝化支化裂纹尖端,复合体系的耐切割和耐屈挠裂纹增长性能优异。成品轮胎的路试结果表明,黏土/天然橡胶纳米复合材料完全可以代替进口天然橡胶用于矿山专用全钢载重子午线轮胎胎面胶配方中。 相似文献
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Lin Meiqin Zhao Qian Dang Shuangmin Yang Zihao Dong Zhaoxia Zhang Juan 《Iranian Polymer Journal》2020,29(5):445-453
Iranian Polymer Journal - Functional monomers, such as 2-acrylamide-2-methylpropionic sulfonic acid (AMPS), N-vinylpyrrolidone (NVP), and acrylamide (AM), were copolymerized into terpolymer... 相似文献
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Lei Wu Chunhui Dong Xiaoqiang Wang Boyu Wang Jinsheng Li Changjun Jiang 《Ceramics International》2018,44(4):4067-4071
La0.67Ca0.33MnO3/BaTiO3 composite films have been grown on Nb-doped SrTiO3 substrates by the sol–gel method. The magnetic and ferroelectric properties in the composite films are investigated. A three-state memory is formed by applying a vertical electric field across the La0.67Ca0.33MnO3/BaTiO3 heterostructure, this behavior is attributed to the polarization-mediated resistive switching effect. In addition, the transport properties of La0.67Ca0.33MnO3 thin film can be modulated by an external magnetic field, a 10.3 K shift of the metal insulator transition temperature is obtained with the change of applied magnetic field from 0 T to 6 T. Consequently, in La0.67Ca0.33MnO3/BaTiO3 heterostructure, the resistance behavior can be modulated by piezoelectric effect, ferroelectric polarization and magnetic field simultaneously. 相似文献
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采用乳液共混法,用少量淀粉等量替代炭黑,制备淀粉/炭黑/丁苯橡胶(SBR)复合材料,研究了淀粉用量对复合材料抗疲劳性能的影响。结果表明,当丁苯胶乳为100份、炭黑与淀粉的总量为50份时,淀粉最佳替代量为5~8份,在此条件下复合材料的抗疲劳性能大幅度提高;淀粉/炭黑/SBR复合材料的抗疲劳性能与硫化胶的抗切割性能、裤形撕裂强度以及损耗因子有一定的相关性。 相似文献
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研究用NBR改善NR/PVC共混物的耐油性能 ,通过测试所设计的各配方共混物的拉伸强度、扯断伸长率、硬度、耐磨性和耐油性等性能 ,得出NBR改性NR/PVC共混体系的最佳配比关系。最佳配方为 :PVC 30 ;NR 10 0 ;NBR 2 5 ;硫黄 3;促进剂TMTD 0 8;促进剂D 1 5 ;促进剂DM 1 5 ;白炭黑 40 ;轻质碳酸钙 30 ;氧化锌 5 ;硬脂酸 1 5 ;防老剂D 2。共混物的耐油性能可达到NBR制品的要求 相似文献
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SBR/PVC/NBR耐油性研究 总被引:3,自引:1,他引:2
用NBR(丁腈橡胶)改善SBR/PVC(丁苯橡胶/聚氯乙烯)共混物的耐油性能,采用黄金分割法设计了几十个配方.通过性能测试(扯断强度、扯断伸长率、硬度、耐磨性、耐油性)找到了NBR增容SBR/PVC共混体系的最佳配比.结果表明最佳配方的各项性能均达到国家标准要求,其中耐油性能(在体积比为31的120#汽油+苯溶液中23℃×24h的质量变化率)已经达到丁腈橡胶制品的≤25%的要求.同时还对第3组分加入量对性能的影响进行了分析和研究. 相似文献
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ACM/FKM并用胶耐热性和耐油性研究 总被引:5,自引:1,他引:5
笔者是以ACM和FKM为主要原料研究耐热性和耐油性的材料,对其合成所采用的配合剂(如填充剂、加工助剂、加工助剂、防老剂、吸酸剂和硫化促进剂)、二段硫化条件及硫化条件对样品的性能(如耐热性、耐油性和压缩永久变形)进行了探讨,实验结果显示:ACM/FKM合金其耐热性接近氟橡胶,而耐油性接近ACM。 相似文献
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《应用陶瓷进展》2013,112(6):381-383
AbstractIn the present work, thermal shock tests of zircon/silicon carbide (30 wt-%) composite specimens were evaluated up to 1000°C and compared with pure zircon specimens at nearly the same porosity content. Results confirmed that the fracture strength of the quenched specimens was not affected with the increase in quenching temperatures by incorporating SiC particles, indicating resistance to crack propagation. On the other hand, the critical temperature difference ΔT, below which material maintains its original strength, was found higher in composite rather than pure zircon specimens. X-ray diffraction investigations showed that zircon on the surface layer of composite specimens decomposes and produces a specimen comprising core and shell. 相似文献
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Chemical resistance of waterborne epoxy/amine coatings 总被引:20,自引:0,他引:20
Alex Wegmann 《Progress in Organic Coatings》1997,32(1-4):231-239
Waterborne epoxy/amine coatings, compared to solvent-based, show considerably lower chemical resistance. This fact is often blamed on hydrophilic emulsifiers or crosslinking agents remaining inside the coating after curing. To judge this assertion, the influence of surfactants and hardeners, as well as various other parameters were investigated. Surfactants appear just to influence the solvent resistance slightly. The main responsibility for the poor resistance to other chemicals – especially acids – lies with unreacted amine curing agents and/or water trapped inside the coating, and, most important, an inhomogeneous film structure due to insufficient coalescence during the curing process. Incremental improvements are possible by using excess epoxy, increasing the film thickness, or curing at elevated temperatures. The latter forces water out of the coating, drives the epoxy/amine reaction to completion, and also somewhat improves the coalescence. However, the resistance can still not be enhanced to the level of a solvent-based system. But although there seem to be inherent limitations to the chemical resistance of waterborne epoxy systems, for many practical applications it is adequate. 相似文献