共查询到20条相似文献,搜索用时 125 毫秒
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对丁腈橡胶(NBR)/氯丁橡胶(CR)并用胶在水、油环境下性能的影响因素进行研究,主要研究NBR/CR配比、硫化体系、炭黑和白炭黑对并用胶的物理性能、体积电阻率和耐水、耐油性能的影响。同时研究了硫化时间对NBR/CR并用胶性能的影响。结果表明:NBR/CR并用胶(并用比为70/30)最佳硫化体系为:氧化锌5,氧化镁6,促进剂DM0.4,硫黄2;随着CR用量的增大,NBR/CR并用胶拉伸强度和体积电阻率先增大后减小,耐油性能增强;炭黑N550填充的并用胶的综合性能最佳,且当炭黑N550用量为50份、白炭黑用量为20份时,并用胶性能最佳;最佳硫化时间为50 min。 相似文献
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研究了炭黑种类及用量对CR/TPI并用胶的影响.结果表明:随着炭黑粒径的增大,混炼胶焦烧时间有增大的趋势,正硫化时间也随之延长;硫化胶交联程度降低;硫化胶的拉伸强度、断裂伸长率、压缩生热温升、屈挠性能和炭黑分散度随之降低;常温下回弹性能、磨耗性能提高;硫化胶的老化性能略有提高.添加炭黑N330硫化胶的综合性能最好.随着炭黑N330用量的增加,硫化胶拉伸强度先增大后减少,炭黑40份左右达到最大值,断裂伸长率减少,磨耗性能和屈挠性能降低,压缩生热温升、邵尔A硬度增大,常温下回弹性能提高. 相似文献
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研究纳米凹凸棒土/炭黑N770/炭黑N330复合填料中纳米凹凸棒土/炭黑N770用量比对天然橡胶(NR)/丁苯橡胶(SBR)/顺丁橡胶(BR)并用胶性能的影响。结果表明:采用纳米凹凸棒土/炭黑N770/炭黑N330复合填料时,随着凹凸棒土用量增大,并用胶的F_L和F_(max)增大,硫化速度减慢,物理性能、耐磨性能和耐屈挠性能提高;纳米凹凸棒土/炭黑N770用量比为30/15时,并用胶的综合性能较优异。与添加其他无机填料(陶土、轻质碳酸钙和白炭黑)/炭黑复合填料的并用胶相比,添加纳米凹凸棒土/炭黑复合填料的并用胶拉伸强度和撕裂强度较高,耐屈挠性能较好,耐磨性能稍差。 相似文献
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用改性淀粉替代部分炭黑填充丁苯橡胶(SBR)/顺丁橡胶(BR)并用胶,考察了改性淀粉用量及偶联剂种类对混炼胶硫化特性及硫化胶物理机械性能和动态力学性能的影响.结果表明,用改性淀粉替代部分炭黑可对SBR/BR混炼胶的硫化产生明显的延迟作用,但改性淀粉用量的变化对焦烧时间与正硫化时间影响不大;添加偶联剂KH-570或NDZ-201延迟了混炼胶的硫化过程,KH-550能大幅度地促进硫化作用,Si-69对于体系的硫化性能略有影响;随着改性淀粉用量的增加,SBR/BR硫化胶的拉伸性能、耐磨耗性均有所降低,但弹性、动态生热和滞后性能得到了明显改善,改性淀粉最佳用量为5~8份;各种偶联剂均可提高SBR/BR硫化胶的拉伸性能,硅烷偶联剂Si-69和KH-570对弹性和动态生热也略有改善,添加偶联剂KH-550改善了SBR/BR硫化胶的抗湿滑性能,但滞后性能变差,添加偶联剂KH-570或Si-69对SBR/BR硫化胶动态力学性能的影响较小,综合考虑,以添加偶联剂KH-570较好. 相似文献
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研究了莱茵新Rhenosin TT100时NR/BR/SBR胎面胶硫化特性、物理机械性能和发黑与其它配合剂在肢料中的分散性以度耐磨性能的影响。结果表明,谈助剂加入NR/BR/SBR配方中可以明显改善炭黑等配合剂在胶料中的分散性,提高挤出胎面肢断面的致密性,提高了撕裂性能、耐磨性。轮胎实际里程试验表明,采用2份Rhenosin TT100的胎冠肢的轮胎耐磨性优异。 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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以黑液-蒙脱土(BL-MMT)为填充补强剂,制备了丁基橡胶(IIR)和三元乙丙橡胶(EPDM)的复合材料,考察了IIR与EPDM的比例、硫化体系和BL-MMT的量对BL-MMT/IIR/EPDM复合材料性能的影响。研究结果表明,IIR与EPDM比例减小可以改善BL-MMT/IIR/EPDM的加工性能,提高其耐热氧老化性能,IIR与EPDM比例为80/20时BL-MMT/IIR/EPDM复合材料的综合性能较好;普通(CV)硫化体系、半有效(SEV)硫化体系和有效(EV)硫化体系均可以使BL-MMT/IIR/EPDM复合材料共硫化,CV硫化体系得到的硫化胶综合物理性能最好,EV硫化体系得到的硫化胶耐热氧老化性能最好;综合BL-MMT/IIR/EPDM复合材料的力学性能及耐热氧老化性能,BL-MMT的填充量30份为宜。 相似文献
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通过废旧聚苯乙烯塑料(EPS)替代砂材料,制备废旧EPS塑料/混凝土复合材料,并研究复合材料流变性能和耐侵蚀性能。结果表明:随着EPS用量的增加,复合材料的流变性能不断提高;其耐水侵蚀性能、耐二氧化碳侵蚀性能和耐低温侵蚀性能均先提高后降低;复合材料的耐高温侵蚀性能逐渐降低。当EPS用量为12%,复合材料的耐水侵蚀性能、耐二氧化碳侵蚀性能和耐低温侵蚀性能最优。 相似文献