增强剂并用对氢化丁腈橡胶/乙烯丙烯酸酯橡胶性能的影响

采用炭黑、白炭黑、甲基丙烯酸锌（ZDMA）并用增强氢化丁腈橡胶（HNBR）/乙烯丙烯酸酯橡胶（AEM）共混胶,考察了白炭黑和ZDMA并用比例对共混胶硫化特性、物理机械性能、耐热老化性能及动态力学性能的影响。结果表明,当炭黑用量、白炭黑和ZDMA总量不变时,随着ZDMA用量的增加,HNBR/AEM共混胶的硫化速率加快,加工性能改善,拉伸强度和邵尔A硬度变化不大,撕裂强度、扯断伸长率、100%定伸应力和压缩永久变形增大;ZDMA的加入可改善HNBR/AEM共混胶的耐热老化性能和低温性能。     

加工工艺对ZDMA/N550/HNBR复合材料结构与性能影响

研究了二段硫化、剪切作用时间以及预混工艺对甲基丙烯酸锌（ZDMA）及其与炭黑（N550）并用填充氢化丁腈橡胶（HNBR）硫化胶的物机性能及压缩永久变形性能影响,并用TEM表征了不同工艺条件下填料在胶料中的分散状态。研究结果表明：采用二段硫化和剪切分散工艺能明显改善填料在胶料中的分散,提高硫化胶的综合性能;ZDMA/过氧化二异丙苯（DCP）预混工艺也能显著使反应性填充补强剂ZDMA形成优异的纳米尺度的分散状态。     

过氧化物与硫黄共硫化氢化丁腈橡胶的性能研究

研究过氧化物/硫黄复合硫化体系对氢化丁腈橡胶(HNBR)性能的影响。结果表明:随着硫化剂DCP用量的增大,胶料的焦烧时间缩短,硫化速度加快,硫化胶的100%定伸应力增大,压缩永久变形减小,耐热老化性能提高;随着硫黄用量的增大,胶料的硫化速度加快,硫化胶的粘合性能提高;促进剂CZ用量对HNBR胶料性能的影响不大;当硫化剂DCP/硫黄/促进剂CZ用量比为7/0.5/1时,HNBR胶料的综合性能最佳。     

原位生成ZDMA补强HNBR性能的研究

对氧化锌和甲基丙烯酸（MAA）发生中和反应原位生成甲基丙烯酸锌（ZDMA）补强氢化丁腈橡胶（HNBR）进行研究。结果表明，原位生成ZDMA对HNBR具有良好的补强作用；硫化剂DCP用量和ZDMA生成量增大，硫化胶的总交联密度和离子键交联密度均增大；氧化锌／MAA摩尔比为0．8、ZDMA理论生成量为30份、硫化荆DCP用量为4份时，硫化胶的综合物理性能较好。     

氢化丁腈橡胶过氧化物硫化体系的研究

研究硫化剂DCP和助交联剂TAC用量对氢化丁腈橡胶（HNBR）胶料性能的影响。结果表明：当助交联剂TAC用量为3份时,随着硫化剂DCP用量的增大,HNBR胶料的焦烧时间和正硫化时间缩短,硫化胶的物理性能提高,压缩永久变形明显减小,耐热氧老化性能有所改善;当硫化剂DCP用量为4份时,随着助交联剂TAC用量的增大,HNBR胶料的门尼粘度降低,硫化胶的定伸应力增大,压缩永久变形减小,耐热氧老化性能变化不大;硫化剂DCP和助交联剂TAC用量对HNBR硫化胶浸油后的物理性能有一定影响,但对体积膨胀率影响不大。     

氢化丁腈橡胶配合体系的研究

试验研究硫化剂DCP和助交联剂TAIC用量以及填料、防老剂和增塑剂种类对氢化丁腈橡胶(HNBR)性能的影响。结果表明:硫化剂DCP用量为4份、助交联剂TAIC用量为3份、填料为炭黑N774(50份)、防护体系为防老剂ZMMBI/445(并用比为1/1)、增塑剂为TOTM(5份)时,HNBR硫化胶的综合性能较好。     

硫化体系对氢化丁腈橡胶性能的影响

研究硫化体系对氢化丁腈橡胶（HNBR）胶料性能的影响.结果表明,HNBR胶料采用硫黄/过氧化物硫化体系较为合适;随硫黄/过氧化物硫化体系中硫化剂DCP用量的增大,HNBR硫化胶300%定伸应力和拉断强度增大,拉断伸长率、拉断永久变形和撕裂强度减小,硫化剂DCP用量为5～7份时,HNBR综合性能较好.     

原位聚合制备HNBR/PZDMA纳米复合材料的结构与性能

采用氧化锌(ZnO)与甲基丙烯酸(MAA)在混炼和硫化过程中原位聚合制备氢化丁腈橡胶/聚甲基丙烯酸锌(HNBR/PZDMA)纳米复合材料.研究了甲基丙烯酸锌(ZDMA)理论生成最、硫化剂用量和二段硫化时间对复合材料物理机械性能的影响,分析了PZDMA对复合材料热稳定性的影响,并考察了混炼胶和硫化胶的形态结构.结果表明,原位合成ZDMA的理论量为50 phr,硫化剂DCP用量为4～6phr,二段硫化时间为9h时,复合材料的综合性能最佳.TGA分析表明PZDMA显著提高了复合材料的热稳定性;SEM分析表明原位合成ZDMA在HNBR中分散均匀,与HNBR相容性较好,拉断断面形态与复合材料高强度相符合.     

硫化体系对氢化丁腈橡胶/氯丁橡胶并用胶性能的影响

研究硫化体系对氢化丁腈橡胶(HNBR)/氯丁橡胶(CR)(并用比70/30)并用胶硫化特性、物理性能和耐热老化性能的影响。结果表明:采用硫化剂DCP/助硫化剂TAIC硫化体系时,HNBR/CR并用胶的焦烧时间较长,拉断伸长率较大,拉断永久变形较小,耐热老化性能较好;当硫化剂DCP用量为5份、助硫化剂TAIC用量为3份时,并用胶的硫化速率较大,加工安全性、耐油性能、综合物理性能和耐热老化性能较好。     

氢化丁腈橡胶/氢化羧基丁腈橡胶并用胶在汽车同步带中的应用研究

研究氢化丁腈橡胶(HNBR)/氢化羧基丁腈橡胶(HXNBR)并用比、硫化剂过氧化二异丙苯(DCP)用量以及混炼工艺对汽车同步带胶料性能的影响。结果表明:随着HXNBR用量增大,胶料交联密度增大,耐热老化性能提高,尼龙帆布粘合力增大,有利于延长汽车同步带使用寿命;随着硫化剂DCP用量增大,胶料交联密度增大,拉伸强度和耐热老化性能先提高后降低;HNBR/HXNBR并用比为70/30、硫化剂DCP用量为7份时,胶料综合性能较好。采用开炼工艺和开炼/密炼工艺(排胶温度110℃)制备的胶料加工安全性能较好。     

纳米填料填充氢化丁腈橡胶的性能及压缩形态特征

研究了不同的炭黑( N 330,N 550,N 770,N 990) 、甲基丙烯酸锌及炭黑N 770 与甲基丙烯酸锌并用填充氢化丁腈橡胶( HNBR) 的性能,用橡胶加工分析仪和透射电镜分析了填料的分散性、形态变化及其与胶料压缩永久变形的关系。结果表明,随炭黑粒径增大,胶料的力学性能有所降低,Payne 效应减小( 即炭黑的分散性变好) ,压缩永久变形减小。炭黑填充胶料具有较好的耐热老化和耐油性能,相比较而言,炭黑N 770 填充胶料的综合性能最好。在填充30 份( 质量) 炭黑N 770 的HNBR 中并用适量的甲基丙烯酸锌,随其用量增加胶料的强度和扯断伸长率明显增大,压缩永久变形增大,Payne 效应变化不大。透射电镜分析结果表明,高温下长时间压缩后,炭黑粒子间的距离缩短,粒子有聚集现象,但粒子本身未发生变形。这表明炭黑填充胶料的压缩永久变形主要源于橡胶分子结构的变化、炭黑粒子的聚集及分布状态的变化。聚甲基丙烯酸锌在HNBR 中的纳米分散性优异。由于压缩后该离聚体粒子易产生滑移、变形和明显的聚集现象,对大分子网络弹性恢复的阻碍作用远高于炭黑,因而胶料的压缩永久变形比炭黑填充者要大得多。     

Structure,morphology, and properties of HNBR filled with N550, SiO2, ZDMA,and two of three kinds of fillers

The vulcanization properties, mechanical properties of hydrogenated nitrile rubber (HNBR) filled with carbon black (N550), zinc dimethacrylate (ZDMA), SiO₂ independently and two of three kinds of fillers together were investigated, respectively. The filler‐dispersion was characterized by the transmission electron microscopy (TEM) and dynamic mechanical properties. The results showed that HNBR composite filled with SiO₂ or ZDMA displayed high tensile strength, elongation at break and compression set. The HNBR composite filled with N550 displayed low compression set, tensile strength and elongation at break. The dispersion of SiO₂ in HNBR compound was better than that in HNBR vulcanizates because of SiO₂ particles self‐aggregation in vulcanizing processing. ZDMA particles with micron rod‐like and silky shape in HNBR compounds changed into near‐spherical poly‐ZDMA particles with nano size in HNBR vulcanizates by in situ polymerization reaction. The N550 particles morphology exhibited no much change between HNBR compounds and vulcanizates. N550/ZDMA have the most effective reinforcement to HNBR and the appropriate amount of ZDMA is about 25% of total filler amount by weights. The theory prediction for Payne effect (dispersion of the filler) shown by the dynamic properties is identical with actual state observed by TEM. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010     

ZSC/氢化丁腈橡胶并用的性能研究

采用热重分析方法计算HNBR和甲基丙烯酸锌(ZDMA)聚合物合金(ZSC)中ZDMA的质量分数,研究ZSC/HNBR胶料的物理性能、耐热老化性能和动态力学性能,并与ZDMA/HNBR胶料进行对比。结果表明,ZSC中ZDMA质量分数约为0.5;在ZDMA用量相同的条件下,ZDMA/HNBR胶料的物理性能略优于ZSC/HNBR胶料,且适量的ZSC能够减小ZSC/HNBR胶料的压缩永久变形,两组胶料耐热老化性能均较优;当ZDMA用量为30份时,两组胶料的综合性能较好。动态力学性能分析结果表明,ZSC在混炼胶中的分散效果优于ZDMA,在硫化胶中则相反;当ZDMA用量大于30份时,ZDMA在ZSC/HNBR和ZDMA/HNBR胶料中的分散效果均较差。     

Effects of Carbon Black on the Properties of HNBR Reinforced by in-situ Prepared ZDMA

Hydrogenated nitrile rubber (HNBR) filled with carbon black (CB) and in-situ prepared zinc dimethacrylate (ZDMA) was prepared by mechanical mixing method. The effects of carbon black on the vulcanization characteristics, physical and dynamic mechanical properties, thermal stability and the fracture surface morphologies of HNBR reinforced by in-situ prepared ZDMA (HNBR/ZDMA) were investigated. The results showed that, for given ZDMA loading (50 phr), with the increasing CB content, the scorch time extended, tensile strength, tear strength and elongation at break increased at first and then decreased, while the modulus at 100% and hardness increased. The comprehensive properties of the HNBR/ZDMA/CB was optimal, when the content of CB was 10 phr. DMA analysis showed that the addition of CB could enhance the storage modulus (E’) & loss modulus (E”), and decreased the glass transition temperature (Tg) of HNBR/ZDMA. TGA analysis revealed that the addition of CB could improve the thermal stability of HNBR/ZDMA. SEM analysis showed that the CB dispersed well in the HNBR/ZDMA, and the CB could improve the dispersion of ZDMA effectively.     

原位合成甲基丙烯酸锌增强氢化丁腈橡胶

用ZnO和甲基丙烯酸(MAA)经原位反应合成了甲基丙烯酸锌(ZDMA),将其作为增强剂用以增强氢化丁腈橡胶(HNBR),研究了ZnO／MAA(摩尔比,下同)、过氧化二异丙苯(DCP)用量和ZDMA用量对硫化胶力学性能的影响。结果表明,当ZnO／MAA为0．8,DCP用量为4份(质量,下同)时,原位合成ZDMA能够显著地提高HNBR的力学性能。随着ZDMA理论生成量的增加,硫化胶的拉伸强度先增加后减少,当ZDMA理论生成量为30份时,硫化胶的最大拉伸强度为47.2MPa．而扯断伸长率保持在393％以上;100％定伸应力随ZDMA理论生成量的增加而增加。经傅里叶变换红外光谱法和广角X光衍射法分析表明,在HNBR混炼过程中,ZnO和MAA可以原位生成ZDMA。     

Swelling and mechanical properties of (acrylonitrile‐butadiene rubber)/(hydrogenated acrylonitrile‐butadiene rubber) blends with precipitated silica filled in gasohol fuels

This work studied the effects of hydrogenated acrylonitrile‐butadiene rubber (HNBR) and precipitated silica (PSi) loadings in acrylonitrile‐butadiene rubber (NBR) filled with 60 parts per hundred of rubber (phr) of carbon black (CB) for oil‐resistant seal applications in contact with gasohol fuel. The cure characteristics, mechanical properties, and swelling behavior of HNBR/NBR blends reinforced with PSi before and after immersion in ethanol‐based oils (E10, E20, and E85) were then monitored. This work studied the effects of PSi loading in rubber compounds on the mechanical properties of the rubber blends. The results suggested that the scorch time of CB‐filled NBR/HNBR was not affected by HNBR loading, but the cure time, Mooney viscosity, and torque difference increased with HNBR content. The swelling of the blends in E85 oil were relatively low compared with those in E10 and E20 oils. The recommended NBR/HNBR blend ratio for oil‐resistant applications was 50/50. Tensile strength and elongation at break before and after immersion in gasohol oils increased with HNBR loading, and the opposite effect was found for tensile modulus and hardness. PSi filler had no effect on scorch time, but decreased the cure time of the blends. The swelling level of the blends slightly decreased with increasing PSi content. The recommended silica content for optimum reinforcement for black‐filled NBR/HNBR blend at 50/50 was 30 phr. The results in this work suggested that NBR/HNBR blends reinforced with 60 phr of CB and 30 phr of silica could be potentially used for rubber seals in contact with gasohol fuels. J. VINYL ADDIT. TECHNOL., 22:239–246, 2016. © 2014 Society of Plastics Engineers     

Study on wear,cutting and chipping behaviors of hydrogenated nitrile butadiene rubber reinforced by carbon black and in‐situ prepared zinc dimethacrylate

In this study, the wear (Akron and DIN) and the cutting and chipping (C&C) behaviors of hydrogenated nitrile butadiene rubber (HNBR) reinforced by carbon black (N115) and in‐situ prepared zinc dimethacrylate (ZDMA) were investigated. It was validated that ZDMA was more effective than N115 to enhance the wear and C&C resistance of HNBR composites. The Akron wear resistance of the HNBR/N115 composites increased with the content of ZDMA, and the Schallamach ridges observed on the abraded surfaces became less and less clear. With increasing content of ZDMA, the failure mode of the DIN abraded surface underwent the transition from craters to Schallamach ridges, and finally to scratches. The HNBR/N115 composite reinforced by 10 phr ZDMA had the best DIN wear resistance when Schallamach ridges were the dominant failure mode. The use of 30 phr ZDMA can dramatically enhance the C&C resistance of the HNBR/N115 composites. The C&C resistance was suggested to be related to both the variation of the morphology of the C&C ridges and the direction of crack propagation as a function of the content of ZDMA. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011     

增强氢化丁腈橡胶的结构与性能

研究了甲基丙烯酸锌(ZDMA)、SiO,和炭黑N 550分别填充氢化丁腈橡胶(HNBR)的流动性、硫化特性、物理机械性能、耐老化性能、压缩永久变形及动态力学性能,表征了填料在HNBR混炼胶及硫化胶中的形态结构.结果表明,3种填料填充的HNBR混炼胶均属非牛顿流体,其中ZDMA填充HNBR混炼胶具有较好的流动性;经过二段硫化后.3种填料填充HNBR具有较佳的物理机械性能、耐老化性能和耐压缩性能;zDMA和SiO2,对HNBR的增强效果显著,但HNBR硫化胶的压缩永久变形偏高,N 550填充HNBR硫化胶的扯断伸长率和压缩永久变形较低;SiO2填充HNBR混炼胶和硫化胶的Payne效应较ZDMA、N 550填充HNBR混炼胶和硫化胶显著;N 550、SiO2种填料在HNBR混炼胶和硫化胶中均能达到纳米尺度,ZDMA在HNBR混炼胶中呈微米尺度,而在HNBR硫化胶中呈纳米尺度.     

古马隆树脂对HNBR性能的影响

采用古马隆树脂为填充剂制备了氢化丁腈橡胶(HNBR)复合材料,研究了古马隆用量对HNBR复合材料硫化特性、物理性能、动态力学性能的影响。结果表明,古马隆树脂具有交联、补强和增塑三重作用。随着古马隆用量的增加,混炼胶的门尼粘度逐渐提高,硫化胶的拉断伸长率明显提高。玻璃化转变温度(Tg)和储能模量(E′)提高。当古马隆用量为5份时,损耗因子(tanδ)最小,拉伸强度和100%定伸应力最大。当古马隆用量为7.5份时,撕裂强度为79.1kN/m。     

Some interesting phenomena in silica‐filled HNBR with the addition of silane coupling agent

Hydrogenated nitrile rubber (HNBR)/silica nanocomposites were prepared by in‐situ modification dispersion technology, and the silane coupling agent γ‐methacryloxypropyl trimethoxy silane (KH570) was chosen to promote the interfacial strength between silica particles and HNBR matrix and further improve the dispersion of silica particles. Rubber Process Analyzer (RPA2000) was used to test the Payne effect of HNBR/silica compounds, from which some interesting phenomena were found: the Payne effect became stronger after KH570 was added to HNBR/silica compound at room temperature, which was a contrary result compared to SBR/silica system. However, after stored for a month at room temperature, the Payne effect weakened, which was contrary to the traditional phenomenon of storage hardening of filled rubber. All these results are related to filler–filler interaction and filler–rubber interaction. The modulus at small strain amplitude of HNBR/silica compound with KH570 gradually decreased with the increase of times of circulatory strain sweep but that of compound without KH570 had almost no change, which was explained by Fourier Transform Infrared (FTIR) results that the reaction between silica and KH570 almost completed at the test condition: 80°C and about 1 h. The effects of silane amount, heat‐treated temperature and time on the Payne effect of compounds and the mechanical properties of vulcanizates were also investigated. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012