共查询到18条相似文献,搜索用时 156 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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固相法改性淀粉/炭黑/丁苯橡胶复合材料的制备与性能研究 总被引:1,自引:0,他引:1
采用固相法制备了淀粉接枝马来酸酐(MAH)和丙烯酸丁酯(BA)的共聚物Starch-gMAH/BA(SMB)。采用机械共混法用15phr的改性淀粉(SMB)代替等量的炭黑(CB),制备了改性淀粉/炭黑/丁苯橡胶复合材料(SMt3/CB/SBR),研究了复合材料的力学性能、热氧老化性能、动态力学性能以及微观形态。结果表明,SMB/CB/SBR复合材料的力学性能优于未改性淀粉/CB/SBR复合材料,拉伸强度及扯断伸长率等性能优于SBR/CB复合材料;且SMB/CB/SBR复合材料具有更好的耐热氧老化性能;与SBR/CB复合材料相比,SMB/CB/SBR复合材料具有更低的滚动阻力;微观形态显示,淀粉经改性后粒子尺寸减小,在SBR基体中的分散性得到改善,与SBR基体的相容性得到提高。 相似文献
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酚醛改性淀粉/丁腈橡胶复合材料的研究 总被引:2,自引:0,他引:2
使用自制酚醛(简称RF)对淀粉进行改性.研究了RF和改性淀粉用量对淀粉/丁腈橡胶复合材料结构和性能的影响。结果表明:在淀粉/RF并用比为10:1.8时,淀粉/丁腈橡胶复合材料性能较好;在淀粉用域为20份、RF用量为3.6时,复合材料与未改性材料相比拉伸强度提升了58%,撕裂强度提升了39%;在改性淀粉用量为47.2份时.拉伸强度能达到15MPa;SEM分析表明:RF增强了淀粉与NBR之间的相互作用,使得淀粉在NBR中分散变好;加入改性淀粉后.淀粉/丁腈橡胶复合材料的耐油性能变好。 相似文献
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研究了炭黑品种和用量对丙烯酸酯橡胶/氟橡胶(ACM/FKM)共混物硫化特性、硫化橡胶力学性能及耐热老化性能的影响。结果表明:当丙烯酸酯橡胶和氟橡胶共混比为30/70时,加入炭黑后共混物焦烧时间t10和正硫化时间t90都减小,硫化橡胶力学性能有不同程度提高。随N660用量的增加.硫化橡胶力学性能先上升后下降。当炭黑用量为20份时,效果最好。 相似文献
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HDPE/炭黑导电复合材料的改性 总被引:1,自引:0,他引:1
本文研究了导电炭黑的品种、含量及其对高密度聚乙烯(HDPE)性能的影响,以及动态硫化对改善HDPE/导电炭黑复合材料物性的贡献。结果表明,HG-4型导电炭黑填充HDPE具有很好的导电性,复合材料力学性能较差;ACET炭黑导电性较差,复合材料力学性能最好。炭黑并用能有效地降低生产成本,而且保持了材料的性能。动态硫化法可以克服复合材料物性差的弱点,并能保持改性材料的高导电性。在HG-4型炭黑含量为7份时,材料的拉伸强度13MPa,断裂伸长率350%,体积电阻率为2.1Ω·cm。 相似文献
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研究了玻璃微珠(GB)用量对聚对苯二甲酸丁二醇酯(PBT)/短玻纤(GF)复合材料熔体流变性和力学性能的影响。结果表明:GB的加入使复合材料的加工流动性增加,添加1.25份GB时,复合材料的MFR比未添加时增加了21%;随着GB用量的增加,复合材料的拉伸、弯曲强度均减小,而材料的断裂伸长率、冲击强度先增大后减小;添加0.25份GB时复合材料的断裂伸长率和冲击强度分别比未添加时增加了11%和33%。 相似文献
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高岭土填充型粉末丁苯橡胶的制备与性能的研究 总被引:2,自引:0,他引:2
以SBR胶乳为原料,经表面改性的高岭土(MO)为填料,高分子树脂为包覆剂,以凝聚共沉法研制高岭土填充型粉末SBR[P(SBR/MO)]。研究了影响产物粒径及硫化胶力学性能的因素,并与块状SBR/MO1机械混炼胶料硫化胶的力学性能进行比较。结果表明:当高岭土用量≥100质量份、包覆剂用量≥5质量份时,可获得粒径≤0.9mm的P(SBR/MO1)达100%;当高岭土的用量为100质量份及其表面改性剂用量的4质量份、Tg为18℃的包覆剂的用量为5质量份时,所获得的P(SBR/MO1)硫化胶力学性能最好。 相似文献
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研究了废纸浆、马来酸酐接枝苯乙烯-乙烯/丁烯-苯乙烯(SEBS-g-MAH)用量以及发泡对废纸浆/丙烯腈-丁二烯-苯乙烯(ABS)复合材料的力学性能和吸水率的影响;通过扫描电镜SEM分析了SEBS-g-MAH对未发泡和发泡废纸浆/ABS复合材料的增容效果.结果表明:废纸浆用量为30份和SEBS-g-MAH用量为20份时,未发泡和发泡复合材料的拉伸性能和缺口冲击强度都达到最佳;吸水率随纸浆用量的增加而增加,SEBS-g-MAH用量为20份时,未发泡和发泡材料吸水率都达到最低.发泡后的复合材料的拉伸强度降低,冲击性能和吸水率升高.SEBS-g-MAH能有效地改善ABS和纸浆的界面相容性. 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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《Polymer Composites》2017,38(11):2594-2602
Novel rice bran carbon (RBC) filled styrene butadiene rubber (SBR) composites were fabricated by latex compounding method (LCM). The chemical structure determination and the static precipitation experiments definitely authenticated the hydrophilicity of RBC, which enables RBC to be uniformly dispersed in water without surface modification and thereby compounded with rubber latex directly. The SBR/RBC composites prepared by LCM exhibited homogeneous filler dispersion state and superior mechanical properties compared with those compounded by solid compounding method (SCM). The vulcanization properties, mechanical properties, thermal stabilities, and swelling properties of SBR/RBC composites prepared by LCM were studied. It was revealed that the tensile strength, modulus, and tear strength of SBR/RBC composites increased correspondingly as the RBC loading increased from 0 to 80 phr. The decomposition temperature would stop rising when the filler loading exceeded 40 phr. The significant increases of the crosslink density with increasing filler volume content indicated the reinforcement effect of RBC. POLYM. COMPOS., 38:2594–2602, 2017. © 2015 Society of Plastics Engineers 相似文献
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A study is reported which aims to identify the optimum contents of wood flour (WF) to be introduced into styrene butadiene/chlorosulphonated polyethylene (SBR/CSM) rubber blend compounded with carbon black. A range of composite properties are considered including cure characteristics and mechanical properties, as well as the adhesion strength (rubber‐to‐metal bonding) behavior. Processing characteristic such as maximum torque increases with increasing of the concentration of WF up to 40 phr in SBR/CSM blend, whereas the scorch time and optimum cure time decreases. Results indicated that the tensile strength and tensile modulus, as well as shore hardness of the SBR/CSM composite in which SBR is predominant, increase in a compliance with the increase of WF. Adhesion strength value on peel between metal and WF filled SBR/CSM rubber blend increases when the filling level increases and the maximum value were observed at 40 phr of WF. The enhancement in mechanical properties was supported by data of crosslink density in these samples obtained from swelling measurement. Addition of WF was recommended as an economical and ecological benefit to industries as the properties of the rubber/carbon black composites remained unchanged with increasing WF content. POLYM. COMPOS., 2008. © 2008 Society of Plastics Engineers. 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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Jing Cai Xiaoyong Yang Ruimin Jiao Xiaofang He Xinxin Cao Fuqin Xu Zhaoyang Hou Zhihui Ma Xinyang Zhang 《应用聚合物科学杂志》2024,141(19):e55363
Pulverized coal (coal) possesses a layered structure similar to graphite and is a potential reinforcing filler. In this paper, ball milling is used to reduce the particle diameter of coal. The coal is modified with KH-560 to obtain K-COAL and prepared K-COAL/styrene-butadiene rubber (SBR) composites. In addition, carbon black (CB) is modified to obtain CB-Si69, K-COAL and CB-Si69 are added to SBR in different ratios to prepare COAL/CB/SBR composites. The results show that the addition of K-COAL can improve the vulcanization performance, thermal stability, and mechanical properties of SBR composites, but the reinforcing effect is weak. In the COAL/CB/SBR composites, the vulcanization and mechanical properties of the composites gradually increase with the increase of CB, while those of the thermal stability decrease. The tensile strength of the 10 phr COAL/30 phr CB/SBR composite is 24.1 MPa, which is elevated by 1105% and 205% compared with the pure SBR and 40 phr K-COAL/SBR composites, respectively. The composites maintain high elasticity while the tensile strengths are greatly improved, and the mechanical properties are significantly enhanced. In conclusion, this paper provides a reference for the clean utilization of coal and shows new possibilities for finding new fillers to replace CB. 相似文献
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High‐abrasion furnace black (HAF, grade N330)–filled powdered styrene butadiene rubber [P(SBR/HAF)] was prepared and the particle size distribution, mixing behavior in a laboratory mixer, and mechanical properties of P(SBR/HAF) were studied. A carbon black–rubber latex coagulation method was developed for preparing carbon black–filled free‐flowing, noncontact staining SBR powders, with particle diameter less than 0.9 mm, under the following conditions: carbon black content > 40 phr, emulsifier/carbon black ratio > 0.02, and coating resin content > 2.5 phr. Over the experimental range, the mixing torque τα of P(SBR/HAF) was not as sensitive to carbon black content and mixing temperature as that of HAF‐filled bale SBR (SBR/HAF), whereas the temperature build‐up ΔT showed little dependency on carbon black content. Compared with SBR/HAF, P(SBR/HAF) showed a 20–30% mixing energy reduction with high carbon black content (>30 phr), which confers to powdered SBR good prospects for internal mixing. Carbon black and the rubber matrix formed a macroscopic homogenization in P(SBR/HAF), and the incorporation step is not obvious in the internal mixing processing results in these special mixing behaviors of P(SBR/HAF). A novel mixing model of carbon black–filled powdered rubber, during the mixing process in an internal mixer, was proposed based on the special mixing behaviors. P(SBR/HAF) vulcanizate showed better mechanical properties than those of SBR/HAF, dependent primarily on the absence of free carbon black and a fine dispersion of filler on the rubber matrix attributed to the proper preparation conditions of noncontact staining carbon black–filled powdered SBR. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 94: 2494–2508, 2004 相似文献