工程轮胎胎面胶用黏土/炭黑/天然橡胶纳米复合材料的性能

在工程轮胎胎面胶配方中,用黏土替代部分高耐磨炭黑,利用机械共混工艺制备了黏土/炭黑/天然橡胶(NR)纳米复合材料,研究了复合材料的综合性能.结果表明,黏土的加入不会对胶料的硫化特性产生太大影响;少量黏土的加入增强了混炼胶的填料网络作用,改善了炭黑/NR硫化胶的物理机械性能,耐磨性能提高了15%～30%,降低了滚动阻力,提高了耐屈挠疲劳破坏性能,当黏土填充量为4份时,复合材料的综合性能最优.     

胶粉/乙烯-辛烯共聚物复合材料的性能

考察了硫化剂过氧化二异丙苯(DCP)对胶粉/乙烯-辛烯共聚物(POE)复合材料硫化特性及物理机械性能的影响,对比了白炭黑与硅藻土对复合材料的增强效果,并研究了白炭黑填充复合材料的耐老化性能。结果表明,当胶粉/POE(质量比)为30/70时,随着DCP用量的增加,正硫化时间逐渐缩短;当DCP用量为2份、硫化时间约为780 s时,胶粉/POE复合材料的综合性能最佳;随着白炭黑用量的增加,胶粉/POE复合材料的拉伸强度和撕裂强度提高,扯断伸长率逐渐降低;随着硅藻土用量的增加,胶粉/POE复合材料的物理机械性能稍呈下降趋势,说明白炭黑的增强效果优于硅藻土;随着白炭黑用量的增加,胶粉/POE复合材料的耐老化性能提高。     

纳米粘土/炭黑/天然橡胶复合材料动态性能的研究

以纳米粘土部分等量替代炭黑填充天然橡胶(NR),制备纳米粘土/炭黑/NR复合材料,研究纳米粘土用量对复合材料动态性能的影响。结果表明:当纳米粘土用量较小时,纳米粘土/炭黑/NR复合材料中填料分散性较好;与炭黑/NR复合材料相比,纳米粘土/炭黑/NR复合材料的滞后损失、动刚度和动静刚度比降低,当纳米粘土用量为2份时,复合材料的动态压缩生热和动静刚度比最低。     

淀粉/炭黑/丁苯橡胶复合材料的抗疲劳性能

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。     

炭黑用量对丙烯酸酯橡胶/AO-80杂化阻尼材料性能的影响

研究了炭黑用量对丙烯酸酯橡胶(ACM)/AO-80复合材料的硫化特性、力学性能和阻尼性能的影响。结果表明,加入炭黑后,ACM/AO-80复合材料的硫化时间大为缩短;随炭黑用量增加力学性能逐渐提高,60份时达到最佳;热氧老化后依然能够保持较为优异的力学性能,耐老化性能良好。与未填充炭黑者相比,炭黑增强ACM/AO-80复合材料的损耗因子峰值下降明显,但有效阻尼温域得到有效拓宽,填充量为60份时可提高10. 1℃,阻尼稳定性也得以改善。综合考虑,60份炭黑宜为最佳填充量。     

碳酸钙晶须增强炭黑NRNBR橡胶复合材料的研究

天然橡胶（NR）与丁腈橡胶（NBR）共混,共混胶兼并NR物理机械性能及NBR耐油性能,但炭黑补强/NR/NBR橡胶复合材料物理机械性能相比炭黑补强NR橡胶复合材料差。在炭黑补强/NR/NBR橡胶复合材料中,加入碳酸钙晶须旨在增强复合材料物理机械性能,提高其使用范围。本文采用钛酸酯偶联剂对碳酸钙晶须进行改性,研究改性后碳酸钙晶须对炭黑/ NR/ NBR橡胶复合材料性能的影响。结果表明：钛酸酯偶联剂改性后的碳酸钙晶须,表面性能改变,有效提高了碳酸钙晶须与炭黑/NR/NBR橡胶复合材料的相容性。当碳酸钙晶须用量为4份时,复合材料的综合性能最佳,有效改善复合材料Payne效应。     

新型补强剂Le在橡胶履带外层凸缘胶中的应用

研究了新型补强剂Le、陶土、轻质碳酸钙及新型补强剂Le/炭黑N330并用在天然橡胶/丁苯橡胶履带外层凸缘胶中的应用。结果表明,新型补强剂Le填充的胶料具有较优加工性能和综合物理机械性能;用20份新型补强剂Le替代炭黑N330,可适当提高天然橡胶/丁苯橡胶履带外层凸缘胶的性能。     

NR/BR复合材料抗裂口增长性能影响因素研究

摘要：研究了填料种类和用量、硫化体系、硫化条件和NR与BR的并用比等因素对NR/BR复合材料抗裂口增长性能的影响。结果表明：对于NR/BR复合材料,炭黑用量在一定范围内时,炭黑用量和种类影响硫化胶的抗裂口增长性能;随着促进剂用量提高或延长硫化时间,抗裂口增长性能变差;而适当提高硫化温度或硫磺用量,NR/BR复合材料的抗裂口增长性能提高;NR/BR并用比、炭黑分布或硫化体系不同时,NR/BR复合材料的耐裂口增长性能都有差异性。     

改性大豆分离蛋白对顺丁橡胶/丁苯橡胶复合材料性能的影响

将糊化改性的大豆分离蛋白( SPI)等量替代炭黑填充至顺丁橡胶/丁苯橡胶中,研究了改性SPI的粒径和热性能,考察了改性SPI用量对橡胶复合材料物理机械性能、热性能、压缩生热性能的影响,并与白炭黑和轻质碳酸钙填充复合材料进行了对比.结果表明,改性SPI的中位径由原来的115.25 μm减小至37.63 μm,比表面积由原...     

炭黑/白炭黑双相填料的配比对溶聚丁苯橡胶性能的影响

考察了用白炭黑取代部分炭黑作为填充剂对溶聚丁苯橡胶(SSBR)硫化胶物理机械性能和动态力学性能的影响。结果表明,采用炭黑/白炭黑双相填料可以提高SSBR硫化胶的物理机械性能和动态力学性能,原因在于双相填料增强了填料与橡胶大分子之间的相互作用,提高了填料在橡胶基质中的分散性。当用20份白炭黑与30份炭黑组成双相填料时,SSBR硫化胶的各项性能达到最佳。     

SBR-clay-carbon black hybrid nanocomposites for tire tread application

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.     

混炼方式对螺旋纳米碳纤维增强天然橡胶复合材料力学性能的影响

采用干法和湿法两种混炼工艺制备了螺旋纳米碳纤维(HCNFs)/炭黑(CB)/天然橡胶(NR)复合材料,通过扫描电镜、拉伸试验机和应变扫描仪分别对所制备复合材料的界面形貌、力学性能和Payne效应进行了测试分析,考察了混炼方式对复合材料宏观力学性能及Payne效应的影响。结果表明,与纯CB填料相比,在干湿两种混炼方式下,添加适量的HCNFs(1～6份)能提高HCNFs/CB/NR复合材料的300%定伸应力、扯断伸长率、拉伸强度和硬度。与干法混炼相比,湿法混炼能明显增强HCNFs/CB/NR复合材料的Payne效应,并提升在HCNFs高添加量(2～6份)条件下的拉伸强度和扯断伸长率,这主要源于湿法混炼能够有效改善HCNFs在橡胶基质中的分散性。     

淀粉/SBR复合材料的吸水性对力学性能的影响

研究了淀粉／SBR复合材料以及淀粉／炭黑／SBR复合材料常温下浸水90d时吸水率和静态力学性能的变化，研究结果表明：淀粉用量增加，复合材料的吸水率增加；含20份淀粉的淀粉／SBR复合材料以及淀粉／炭黑／SBR复合材料在常温下浸水90d后，吸水率分别为8．5％和7．5％；淀粉的用量在20份范围内，随着材料浸水时间的延长，淀粉／炭黑／SBR复合材料的力学性能与纯SBR硫化胶和炭黑／SBR复合材料力学性能变化的趋势一致。材料的力学性能浸水30d内有所波动，当浸水至90d时，与未浸水时的相差不大。     

聚苯胺改性蒙脱土/天然橡胶纳米复合材料的制备与性能

采用原位聚合法制备了聚苯胺质量分数为20% 的聚苯胺改性蒙脱土,并以此作为增强剂利用机械混炼法制备了聚苯胺改性蒙脱土( PANI － MMT) /天然橡胶( NR) 纳米复合材料。使用X 射线衍射仪、傅里叶变换红外光谱仪及扫描电镜等对PANI － MMT 和PANI － MMT/NR 复合材料的结构进行了表征,并考察了PANI － MMT/NR 复合材料的力学性能。结果表明,PANI － MMT/NR 复合材料形成了插层型纳米结构; 与普通的有机蒙脱土/NR 复合材料相比,PANI － MMT/NR 复合材料的力学性能明显提高,PANI － MMT 添加质量为20 份时其力学性能达到最好,并超过了添加40 份炭黑N 660 的NR 的力学性能。     

DCP／MgO复合硫化体系的PUR／CR共混物硫化特性

采用硫化特性参数、溶胀指数和DSC谱图等表征了聚氨酯橡胶(PUR)/氯丁橡胶(CR)共混胶的共硫化性能,并研究了PUR/CR的共混比、补强体系与软化体系等对共混胶的硫化特性的影响.结果表明,采用过氧化二异丙苯/氧化镁(DCP/MgO)复合硫化体系,可以使PUR/CR共混胶达到共硫化;增加PUR和炭黑的用量,减少软化剂的用量,则共混胶料的转矩增大;增加PUR用量,可以加快共混胶料的硫化速度,其它因素对硫化速度的影响不明显.当PUR/CR共混比为20/80、DCP 3份、MgO 4份、炭黑N550 30份、软化剂聚异丁烯(PIB)5份时,共混硫化胶有较好的综合性能.     

原位聚合ZDMA与炭黑并用补强POE的研究

研究了原位聚合甲基丙烯酸锌(ZDMA)与炭黑并用以及体系的填充量、ZDMA理论生成量、ZnO/MMA摩尔比对聚烯烃弹性体(POE)硫化胶性能的影响.结果表明,加入炭黑改善了胶料的拉伸永久变形,当ZDMA与炭黑的用量为50～60份时,填料分散好,对胶料的补强效果显著.ZDMA理论用量为30～40份、ZnO/MMA摩尔比为0.75左右时,胶料的综合力学性能最好.     

Vulcanization behavior and mechanical properties of organoclay fluoroelastomer nanocomposites

The vulcanization behavior and mechanical properties of clay/fluoroelastomer nanocomposites produced by melt‐mixing of Dyneon FPO 3741 (a terpolymer of vinylidene fluoride, hexafluoropropylene, and tetrafluoroethylene) with 10 phr of unmodified montmorillonite (CloisiteNA) or di(hydrogenated tallow‐alkyl) dimethyl ammonium‐modified montmorillonites (Cloisite15A and Cloisite20A) were studied. The properties of clay/FKM nanocomposites were compared with composites prepared using 10 and 30 phr of carbon black. The effects of clay surfactant and surfactant concentration on the vulcanization behavior, mechanical, and dynamical properties of peroxide cured composites were studied. XRD results of cured composites showed a decrease in d‐spacing and indicated deintercalation of the clays after the vulcanization process. It was also found that organoclays retard the FKM peroxide vulcanization process. Significantly, higher maximum torque on vulcanization was obtained with organoclays versus unmodified clay and carbon black. Although the morphologies of organoclay/FKM nanocomposites studied by XRD and TEM suggest similar intercalated/exfoliated structures, the organoclay with the lowest concentration of surfactant (95 meq/100 g clay) resulted in the highest increase in torque, modulus, hardness, and tear strength in the clay/FKM nanocomposites. It was also found that organoclays can increase both the hydrodynamic reinforcement and hysteresis loss of FKM nanocomposites. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011     

Mechanical and dynamical mechanical properties of chloroprene rubber and cellulose II composites

Vulcanized composites of chloroprene rubber (CR) with cellulose II (Cel II) as a filler were investigated. Cel II, obtained by the coagulation of cellulose xanthate, was incorporated in the rubber by the traditional method. The filler content varied from 0 to 30 phr. For comparison purposes, carbon black (CB)–CR composites were also studied. The CB amount varied from 0 to 45 phr. The mechanical and dynamic mechanical properties were determined, and the CR composite containing 20 phr of Cel II showed the best set of properties. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 92: 2425–2430, 2004