共查询到19条相似文献，搜索用时 125 毫秒
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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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研究碳纤维/炭黑/丁腈橡胶复合材料的物理性能和导电性能。结果表明：随着碳纤维用量的增大,复合材料的硬度和撕裂强度增大,拉伸强度、定伸应力和拉断伸长率先增大后减小;加入碳纤维后复合材料的导电性能明显提高,碳纤维长度对导电性能影响不大;经浓硝酸处理后的碳纤维与基体材料结合更紧密。 相似文献
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采用苄基氯对淀粉进行疏水改性,制备疏水淀粉/丁苯胶复合材料并对其性能进行研究。结果表明,随着疏水淀粉加入量的增加,硫化和焦烧时间总体呈缩短趋势,复合材料的邵尔A型硬度、拉伸强度、撕裂强度和拉断伸长率都呈现上升趋势,DIN磨耗量减小;耐热空气老化性能有所下降。 相似文献
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The influence of starch on the properties of carbon‐black‐filled styrene–butadiene rubber (SBR) composites was investigated. When the starch particles were directly melt‐mixed into rubber, the stress at 300% elongation and abrasion resistance decreased evidently with increasing starch amount from 5 to 20 phr. Scanning electron microscopy observations of the abrasion surface showed that some apparent craters of starch particles were left on the surface of the composite, which strongly suggested that the starch particles were large and that interfacial adhesion between the starch and rubber was relatively weak. To improve the dispersion of the starch in the rubber matrix, starch/SBR master batches were prepared by a latex compounding method. Compared with the direct mixing of the starch particles into rubber, the incorporation of starch/SBR master batches improved the abrasion resistance of the starch/carbon black/SBR composites. With starch/SBR master batches, no holes of starch particles were left on the surface; this suggested that the interfacial strength was improved because of the fine dispersion of starch. Dynamic mechanical thermal analysis showed that the loss factor at both 0 and 60°C increased with increasing amount of starch at a small tensile deformation of 0.1%, whereas at a large tensile strain of 5%, the loss factor at 60°C decreased when the starch amount was varied from 5 to 20 phr. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009 相似文献
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采用溶胶沉淀法制备了纳米CaCO3/SiO2复合粒子,并用不同改性剂对其进行表面改性,考察了改性复合粒子对丁苯橡胶(SBR)物理机械性能的影响,同时与硬脂酸钠改性纳米CaCO3填充的SBR硫化胶做了比较。结果表明,CaCO3/SiO2复合粒子粒径为40～50 nm,大小均匀,表面粗糙,SiO2包覆在纳米CaCO3表面,具有核壳结构;硬脂酸钠改性复合粒子填充SBR硫化胶的拉伸强度、撕裂强度、永久变形和邵尔A硬度均大于改性纳米CaCO3填充SBR硫化胶,最大拉伸强度可达到13.6 MPa,两者的300%定伸应力和扯断伸长率相当;用硬脂酸钠和Si 69协同改性的纳米CaCO3/SiO2填充SBR硫化胶的拉伸强度、300%定伸应力、撕裂强度和邵尔A硬度均明显优于硬脂酸钠改性复合粒子填充的SBR硫化胶,最大拉伸强度达到14.1 MPa,扯断伸长率减小,低填充量时两者的永久变形差别不大,高填充量时前者的永久变形低于后者。 相似文献
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淀粉/SBR复合材料结构和性能的研究 总被引：1，自引：1，他引：1
采用淀粉水溶液与丁苯胶乳共混共凝聚的方法制备淀粉／SBR复合材料，并对其结构和性能进行研究。结果表明，与SBR相比，淀粉／SBR复合材料的焦烧时间缩短，硫化速度减慢，且随着淀粉用量的增大，复合材料的ML和MH增大，邵尔A型硬度、300％定伸应力、拉伸强度和撕裂强度显著增大；淀粉与SBR形成较好的界面结合，淀粉在SBR基体中分散粒径较小；随着淀粉用量的增大，复合材料的剪切储能模量增大，高温拉伸储能模量逐渐增大，只有一个玻璃化温度，不具有两相结构的特征。 相似文献
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研究导电炭黑VXC72及沥青基短切碳纤维(CF)用量对丁腈橡胶(NBR)物理性能、导热及导电性能的影响。结果表明,随着导电炭黑VXC72用量的增大,NBR胶料和CF/NBR复合材料的拉伸强度、撕裂强度、定伸应力和热导率逐渐增大,体积电阻率逐渐降低,而且CF/NBR硫化胶的50%、100%定伸应力和热导率比NBR硫化胶有不同程度提高。当导电炭黑VXC72用量相同时,随着CF用量的增大,复合材料的拉伸强度、撕裂强度和拉断伸长率先减小后增大,热导率基本呈线性增加,体积电阻率明显降低。 相似文献
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The mechanical properties, heat aging resistance, dynamic properties, and abrasion resistance of fibrillar silicate (FS)/styrene butadiene rubber (SBR) nanocomposites are discussed in detail. Compared with white carbon black (WCB)/SBR composites, FS/SBR composites exhibit higher tensile stress at definite strain, higher tear strength, and lower elongation at break but poor abrasion resistance and tensile strength. Surprisingly, FS/SBR compounds have better flow properties. This is because by rubber melt blending modified FS can be separated into numerous nanosized fibrils under mechanical shear. Moreover, the composites show visible anisotropy due to the orientation of nanofibrils. There is potential for FS to be used to some extent as a reinforcing agent for rubber instead of short microfibers or white carbon black. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 101: 2725–2731, 2006 相似文献