氢化丁腈橡胶/丁腈橡胶耐热密封复合材料的性能研究

研究炭黑、白炭黑、碳酸钙和陶土对氢化丁腈橡胶（HNBR）/丁腈橡胶（NBR）耐热密封复合材料的硫化特性、物理性能、耐热空气老化性能和耐油性能的影响。结果表明：白炭黑补强并用胶的耐热空气老化性能和耐油性能较好,但压缩永久变形大;陶土和碳酸钙补强并用胶的各项性能均较差;炭黑N220补强并用胶的物理性能较好,压缩永久变形小,更适合作为制备HNBR/NBR耐热密封材料的补强填料;炭黑N220和N330在并用胶中分散均匀,而炭黑N770分散不均匀,粒子聚集体较多。     

补强体系对NR硫化胶疲劳破坏特性的影响

用断裂力学方法研究炭黑N330、炭黑N330/白炭黑和白炭黑补强NR硫化胶的疲劳破坏特性.结果表明,与炭黑N330和炭黑N330/白炭黑补强的NR硫化胶相比,白炭黑补强的NR硫化胶疲劳寿命较长,内部潜在缺陷较少,抗裂纹扩展性能较好;随着疲劳时间的延长,NR硫化胶拉断时的应变能密度减小;疲劳寿命方程能够快速、准确地预测NR硫化胶的疲劳寿命.     

炭黑/高分散白炭黑对丁腈橡胶耐热及耐油性能的影响

用正交试验法对N220、N550和ST1120三种炭黑和高分散白炭黑共同补强的丁腈橡胶在耐空气热老化和耐油方面的性能进行了研究.结果表明炭黑N220和ST1120对丁腈橡胶老化行为具有显著影响,N220最优添加量为10 phr,ST1120最优添加量为20 phr; N550对橡胶老化的影响较小,可以大量添加起到补强作用;高分散白炭黑可显著降低正硫化时间和焦烧时间.     

改性碳纳米管在不同补强填充体系丁腈橡胶中的应用研究

研究改性碳纳米管（CNTs）在碳酸钙、白炭黑、炭黑N330补强填充体系丁腈橡胶（NBR）中的应用。结果表明：随着改性CNTs用量增大,碳酸钙补强填充体系和白炭黑补强填充体系NBR的MH－ML逐渐增大,t90缩短;炭黑N330补强填充体系NBR的MH－ML增大,t90延长;3种补强填充体系NBR的硬度、100%定伸应力、撕裂强度逐渐增大,碳酸钙补强填充体系NBR的拉伸强度提高,白炭黑补强填充体系和炭黑N330补强填充体系NBR的拉伸强度稍有降低;碳酸钙补强填充体系和白炭黑补强填充体系NBR的表面电阻率（ρs）和体积电阻率（ρv）变化较小,变化规律不明显;炭黑N330补强填充体系NBR的ρs和ρv较小,导电效果较好;3种补强填充体系NBR的导热性能均有所提高,炭黑N330补强填充体系胶料的热扩散率最大。     

炭黑补强NR硫化胶疲劳破坏特性的研究

用断裂力学方法研究炭黑N110，N220和N330补强NR硫化胶的疲劳破坏特性。结果表明，随着疲劳时问的延长，3种炭黑补强硫化胶的拉断形变能密度均减小，且炭黑粒径越小，硫化胶的拉断形变能密度降幅越大；炭黑粒径越小的硫化胶内部潜在缺陷越小，但抗裂纹扩展性能越差，疲劳寿命越短；3种炭黑补强硫化胶的疲劳寿命方程均能较准确地预测其疲劳寿命。     

翻新工程机械轮胎胎面胶补强剂的研究

在26.5R25翻新工程机械轮胎胎面胶配方中添加炭黑和白炭黑,研究其对胎面胶的补强效果。结果表明:单一品种炭黑补强胎面胶时,炭黑N151用量为40份时补强效果较佳;炭黑N330与其他品种炭黑并用补强胎面胶时,炭黑N330用量为40份、其他品种炭黑用量为20份时补强效果较佳;炭黑N330与白炭黑并用补强胎面胶时,炭黑N330用量为40份、白炭黑用量为20份时补强效果较为理想,胎面胶的耐磨性能和抗崩花掉块性能均提高;炭黑补强胎面胶机理可应用分子链滑动理论解释,胎面胶中炭黑含量有最佳值,橡胶分子链与炭黑颗粒之间的有效融合吸附阻止了橡胶分子链发生形变和拉伸,从而对橡胶起到补强作用。     

炭黑对NBR/PVC/LNBR共混弹性体性能的影响

研究了炭黑补强体系N330/N550对丁腈橡胶(NBR)/聚氯乙烯(PVC)/液体丁腈橡胶(LNBR)共混弹性体性能的影响。结果表明,当炭黑N330/N550质量比为10/30时,混炼胶的各项物理机械性能很好,老化前拉伸强度为11.24MPa,断裂伸长率为588%,拉伸永久变形率为14.4%,邵尔A硬度为58;老化后拉伸强度为13.16MPa,断裂伸长率为330%,拉伸永久变形率为7.89%,邵尔A硬度为66,阿克隆磨耗体积为0.197cm3,屈挠195 000次性能仍然很好;通过橡胶加工分析仪(RPA)测试得出,损耗模量随着剪切速率的增加而增加,随着温度的升高而降低,随着应变的增加而降低。     

Gaither Tool推出一款新的移动轮胎维修设备

摘要：本文主要研究了不同牌号的碳黑对氯丁橡胶硫化胶料物理机械性能的影响以及不同牌号的碳黑在氯丁橡胶与黄铜粘合中的应用。通过研究发现：采用碳黑N330或者碳黑N550时能够得到具有良好物理机械性能的硫化胶料。无论是物理粘合法还是化学粘合法,采用碳黑N550的配方其初始抽出力、耐老化抽出力以及耐水腐蚀后抽出力均最大。     

螺杆泵定子橡胶材料制备及力学性能研究

选用3种不同丙烯腈含量的生胶(型号为N3965、N3345和JSR N220S)同时改变补强体系中炭黑与白炭黑的比例,研究生胶、补强剂和温度对丁腈橡胶材料力学性能的影响。结果表明,N3965弹性体材料在硬度、拉伸性能、压缩弹性模量及耐热性能等方面都优于其他两种材料。同时,研究了4种不同的炭黑与白炭黑并用比例对N3965力学性能的影响。结果表明,随着白炭黑用量的不断增大,N3965材料的抗拉强度、延伸率、撕裂强度和耐热性能均有提高,但其压缩弹性模量有所降低,压缩永久变形量、蠕变量和应力松弛量变大,当炭黑和白炭黑的并用比例为100∶30时,N3965硫化胶料的综合性能最好。试验结果表明,温度对丁腈橡胶材料的力学性能有显著影响,随着温度的升高,丁腈橡胶材料的抗拉强度出现了明显的下降,压缩应力松弛率先快速减小随后逐渐增大。     

不同炭黑种类对丁腈橡胶性能的影响

研究炭黑种类对丁腈橡胶物理机械性能、动态力学性能、耐热性能的影响。研究结果表明:炭黑粒径越高,混炼胶口型膨胀率越大,炭黑N550在混炼胶中的分散性较好;炭黑粒径越小,胶料的流动性降低,拉伸强度和硬度越大,补强效果越好,同时压缩生热量越大,压缩永久变形越大;填充N330和N774硫化胶耐热老化性较差。     

Distribution of carbon black in natural rubber/acrylic rubber blends

Distributions of carbon black in 30/70% (w/w) natural rubber (NR)/acrylic rubber (ACM) blends were investigated as a function of the carbon black content and type using a dynamic mechanical thermal analysis (DMTA) technique. Two different types of carbon black (N220 and N330) were used, and 10–50 phr carbon black was compounded to the rubber blends. From the DMTA thermograms of various blends, the weight fractions of carbon black in the NR and ACM phases were calculated. Carbon black was unevenly distributed in the rubber blend. It preferred to migrate into the NR phase, regardless of the amount of carbon black that was used. By increasing the carbon black content, the weight fraction of carbon black in the NR phase decreased whereas that in the ACM phase increased. A change in the type of carbon black from N220 to N330 significantly decreased the weight fraction of carbon black in the NR phase, but it was not sufficiently strong to affect the tensile properties and hardness of the rubber blend. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 102:248–256, 2006     

Relationship between the material properties and fatigue crack‐growth characteristics of natural rubber filled with different carbon blacks

An investigation of the influence of different types of carbon black on fatigue crack‐growth behavior was undertaken. Fatigue tests were carried out on edge‐notched specimens under cyclic tension loading. A power‐law dependency between the crack‐growth rate and tearing energy was obtained. Natural rubber (NR) filled with N330 (the mean diameter is 30 nm) carbon black possessed the lowest values of exponent b and constant B (the two crack growth parameters determined from cyclic crack growth testing), which denoted the strongest resistance to crack growth at a given tearing energy. Strain‐induced crystallization was investigated by the modified Mooney–Rivlin equation and showed the earliest appearance and strongest ability of the crystallization of the NR/N330 composite at the largest amount of bound rubber. The study on the viscoelastic properties by dynamic mechanical analysis confirmed that the NR/N330 composite had the largest viscoelastic contribution, which was attributed to the viscoelastic dissipation in the viscoelastic region in front of the crack tip. All of these results confirm the best crack‐propagation resistance of NR filled with N330. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010     

废旧轮胎裂解炭黑在橡胶地板中的应用

对比废旧轮胎裂解炭黑(CBp)和炭黑N330的理化性能,研究CBp部分替代炭黑N330对橡胶地板胶料性能的影响。结果表明:CBp灰分含量较大,结构度较低,其他理化性能与炭黑N330基本相当;在橡胶地板胶料中用CBp替代30%炭黑N330,胶料的硫化特性、硫化胶的物理性能和耐老化性能、橡胶地板的使用性能均符合普通橡胶地板的技术要求,且有效降低了生产成本。     

Multiphase polymer processing: Controlled-ingredient-distribution mixing and its effect on some properties of styrene-butadiene (SBR)/butadiene-acrylonitrile copolymer rubber blend compounds

The flex-crack-growth resistance and oil-swelling resistance of a styrene-butadiene (SBR)/butadiene-acrylonitrile co-polymer (NBR) rubber blend are studied as a function of the distribution of ingredients in the individual rubber phases. The blends consist of 70:30 weight ratio of SBR:NBR with incorporation of 82.5 phr carbon black and other ingredients via the controlled-ingredient-distribution mixing procedure. The results show that flex crack growth is affected by the distribution of carbon black. Better flex crack growth resistance could be achieved by adding 10 percent of carbon black to the NBR rubber phase and 90 percent to the SBR phase. The swelling of these rubber blends in ASTM #2 oil is also affected by the location of carbon black and by the mixing history. The blends with more black initially preloaded in the SBR phase have lower swelling, as have blends with shorter cross-mixing time or the mill. A simple equation based on the permeation/moduli of composite materials is proposed to describe the swelling of this rubber blend in terms of the swelling of the constituent rubber phases, the distribution of ingredient in the individual rubber phases, and the blend morphology. One of the key assumptions is to consider the individual black preloaded rubber as a continuum. The quantitative correlation with the observed swelling data is reasonably good.     

橡胶/炭黑复合材料的压敏性和时间响应性

以炭黑（Ｎ３３０,Ｎ５５０）为导电相,橡胶（ＮＲ,ＥＰＤＭ,ＮＢＲ）为基质制备压敏导电复合材料。研究了复合材料的压敏性和不同压力条件下复合材料的时间响应性,讨论了对复合材料性能和压敏性的影响。     

汽车发动机密封用丁腈橡胶涂料的研制

介绍了汽车发动机密封用丁腈橡胶涂料的制备方法,讨论了溶剂、填料、酚醛树脂、硫化剂及其他助剂的选用对涂层性能的影响,得出了丁腈橡胶涂料最佳配方:丁腈橡胶N41 100份,酚醛树脂2402 50~55份,炭黑N330 30份,氧化锌5份,硫磺1~3份,促进剂CZ 0.5~2份,促进剂DM 0.5~1.5份,DOP 5份,防老剂RD 2份,醋酸乙酯200~270份,丁酮30~100份。讨论了不同的底涂剂对涂层的影响,结果表明:Chem lok 205对丁腈橡胶与金属板材粘接效果最佳。采用辊涂的方式对丁腈涂料进行施工,硫化温度150℃,硫化时间为1 h。在此条件下生产的丁腈橡胶涂料垫片,可满足汽车发动机的工况要求。     

工程车辆翻新轮胎补强剂性能补强试验及机理

为了改善工程车辆翻新轮胎在使用中经常出现胎面不耐磨、易崩花掉块的损坏形式,将炭黑、白炭黑作为补强剂加入到胎面基体配方中,通过改变用量及加料顺序,对三种不同配方体系下的胎面进行拉伸强度、撕裂强度、300%定伸应力、拉断伸长率、耐磨指数、硬度及炭黑分散度扫描等物理机械性能进行测试,获得了如下主要结论：单一炭黑配方体系中,当炭黑N151质量份为40,混合配方体系中,当炭黑N330质量份为40、白炭黑质量份为20时,性能补强效果较为理想,耐磨性及抗崩花掉块性能大大提高。应用分子链滑动理论解释了炭黑的补强机理,炭黑颗粒与橡胶分子链之间需要保持一个合适的吸附比表面积,需要炭黑含量达到一个最佳值,炭黑含量过低,橡胶分子链不能紧密融合,炭黑含量过高,会导致炭黑颗粒间空隙小,同样橡胶分子链不能有效融合,补强效果不理想。     

一种新型耐腐蚀传送带的研制

采用共聚氯醇橡胶/NBR为覆盖胶原料,11支纱棉布浸胶为带坯制备了一种新型耐腐蚀传送带。实验表明:最优覆盖胶配方为:二元共聚氯醇橡胶/NBR(50/50)的共混胶100;炭黑N330 10;硫化剂NA-225;防老剂RD 1;促进剂DM 0.25;四氧化三铅6;硬脂酸1;最优硫化条件为:压强20KMp,时间40min,温度150℃。对样品进行耐酸碱以及有机溶剂腐蚀性测试;采用万能材料测试机对制得的传送带的力学性能进行了表征。     

炭黑对NR／TPI并用胶补强性能的影响研究

研究了炭黑种类扣用量对天然橡胶（NR）／反式-1,4-聚异戊二烯（TPI）并用胶的补强效果。结果表明,合适的混炼工艺下,NR／TPI并用胶中炭黑种类选择N330、其用量为45～50份时,并用胶的拉伸强度、撕裂强度、断裂伸长率最佳,回弹性、硬度适中。屈挠和压缩生热性能较好,达到了对NR／TPI并用胶综合力学性能预期的结果。     

扫描探针对炭黑结构及其结合胶微观形貌的研究

以N234、N330、低滞后DZ13 3种不同结构的橡胶补强炭黑为材料,通过扫描探针对其聚集体形貌及其结合胶的微观形貌进行了研究。实验表明:N234的聚集体小,分布窄,二次结构影响较小;N330的聚集体形貌如同葡萄串,有链枝状;DZ13的聚集体分布较宽,大小不一。通过对结合橡胶结构观察发现,N234的结合方式不同于其它2种结构炭黑,结合胶的量更大,而DZ13表面的橡胶壳大于N330表面的橡胶壳,侧面证明了DZ13的表面活性较大。结合胶形貌的研究有助于了解炭黑结构对橡胶补强的影响,对炭黑补强机理的研究提供了直观的证据。