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。     

高性能氢化丁腈橡胶密封材料的制备及性能

研究了不同生胶、硫化剂、填料以及增塑剂对氢化丁腈橡胶(HNBR)性能的影响。结果表明,当生胶选用HNBR(Y-41),硫化剂双2,5/TAIC用量为5份/4份,炭黑N990用量为65份,增塑剂TOTM用量为5份时,可获得耐油性和耐老化性优良、硬度适中且压缩永久变形较小的密封胶料。     

增强氢化丁腈橡胶粘合性能的研究

试验研究增塑剂品种和用量、硫化时间以及粘合体系对氢化丁腈橡胶(HNBR)粘合性能的影响。结果表明,当增塑剂D810用量为8份,硫化时间为35 min,采用粘合剂A-粘合剂RS-白炭黑粘合体系时,HNBR硫化胶的粘合性能最佳,综合物理性能较好。     

氢化丁腈橡胶耐热配方的优选研究

研究了硫化剂DCP用量、助硫化剂TAIC用量和耐热助剂种类及用量对氢化丁腈橡胶耐热空气老化性能的影响.结果表明,当硫化剂DCP用量为4.5份、助硫化剂TAIC用量为3份并加入15份甲基丙烯酸镁时,氢化丁腈橡胶耐热空气老化性能最佳;175℃×96 h热空气老化后,氢化丁腈橡胶拉伸强度变化率仅为-2.0％,拉断伸长率变化率...     

增塑体系对氢化丁腈橡胶性能的影响

研究增塑剂种类及用量对氢化丁腈橡胶（HNBR）性能的影响。结果表明：采用增塑剂TP-95的HNBR胶料的t₁₀和t₉₀较短，相应硫化胶具有较好的耐低温性能；采用增塑剂DOS的HNBR硫化胶具有较大的硬度和拉伸强度以及良好的耐油性能；随着增塑剂用量的增大，HNBR胶料的门尼粘度明显下降，硫化剂的耐低温性能改善；当采用20份增塑剂DOS时，HNBR硫化胶具有较好的物理性能和耐油性能，同时具有不错的耐低温性能。     

高性能氢化丁腈橡胶密封胶料的制备及性能

研究了硫化剂过氧化二异丙苯(DCP)和增塑剂聚己二酸乙二醇酯(QS-1)用量对氢化丁腈橡胶(HNBR)硫化特性、力学性能、耐老化性能及动态力学性能的影响,并对其进行了差示扫描量热分析。结果表明,QS-1对胶料的焦烧时间、正硫化时间及硫化速率基本没有影响。DCP用量相同时,随着QS-1用量的增加,硫化胶的邵尔A硬度和200%定伸应力降低,扯断伸长率和压缩永久变形增大,但对拉伸强度影响不大;DCP用量对胶料扯断伸长率和压缩永久变形的影响远高于QS-1;高交联密度的胶料具有较好的耐热、耐油老化性能;QS-1对HNBR硫化胶的玻璃化转变温度以及耐热、耐油老化性能影响不大,但可降低胶料的Payne效应,进而改善炭黑在HNBR中的分散性。DCP用量在3.5份左右、QS-1用量在3～5份时可获得性能优异的密封胶料。     

氢化丁腈橡胶

介绍了氢化丁腈橡胶的制备方法，性能，配合原则及其主要特性和用途。     

防老剂在过氧化物硫化体系氢化丁腈橡胶胶料中的应用研究

研究几种防老剂单用或并用对过氧化物硫化体系氢化丁腈橡胶(HNBR)胶料性能的影响。结果表明:防老剂ZMTI对胶料硫化特性和物理性能的影响较小,胶料的耐热老化性能较优;随着防老剂ZMTI用量的增大,胶料的耐热老化性能提高,但抗压缩永久变形性能下降;防老剂ZMTI与复合抗氧剂FG或防老剂ODA并用时胶料的耐热老化性能提高,但与防老剂445或防老剂RD并用时胶料的耐热老化性能下降。     

氢化丁腈橡胶的研究进展

简述氢化丁腈橡胶(HNBR)的发展历史、制备方法和结构与性能。从生胶体系、硫化体系、填料体系、防护体系、增塑体系重点阐述了HNBR的配方设计。HNBR具有优异的综合性能,但由于价格较高在一定程度上限制了其在工业中的应用。改善生产工艺,降低生产成本,研制出高性能产品,是推广应用HNBR的主要途径。     

Nanocomposite Formation in Hydrogenated Nitrile Rubber (HNBR)/Organo‐Montmorillonite as a Function of the Intercalant Type

Summary: Hydrogenated acrylonitrile butadiene rubber (HNBR) was melt compounded with montmorillonite (MMT) and organophilic modified MMTs prior to sulfur curing. In contrast to the micro‐composite formation resulting from the compounding of the HNBR and pristine MMT, the modified MMTs (i.e., octadecylamine: MMT‐ODA, octadecyltrimethylamine: MMT‐ODTMA, methyltallow‐bis(2‐hydroxyethyl) quaternary ammonium: MMT‐MTH intercalants) produced nanocomposites. It was found that the organoclay with primary amine intercalant (cf. MMT‐ODA) gave confined structures along with the exfoliated/intercalated structures. This was traced to its reactivity with the curatives. By contrast, the organoclays containing less reactive quaternary ammonium compounds (cf. MMT‐ODTMA, MMT‐MTH) were exfoliated and intercalated based on X‐ray diffraction (XRD) and transmission electron microscopy (TEM) results. The hydroxyl functional groups of the MMT‐MTH supported the clay dispersion. The better adhesion between MMT‐MTH and HNBR was explained by hydrogen bonding between the hydroxyl groups of the intercalant and the acrylonitrile group of the HNBR matrix. This HNBR/MMT‐MTH nanocomposite showed the best mechanical properties as verified by tensile mechanical tests and dynamic mechanical thermal analysis (DMTA). The high tensile strength along with the high elongation at break for the rubber nanocomposites were attributed to the ability of the ‘clay network’ to dissipate the input energy upon uniaxial loading.

Scheme of failure development in rubber/organoclay mixes with poor (a) and good (b) dispersion of the clay layers.     

硅烷偶联剂原位改性白炭黑填充氢化丁腈橡胶（HNBR）复合材料性能研究

研究对比了硅烷偶联剂常温处理和原位改性白炭黑填充HNBR胶料性能,并进一步探索了不同种类的硅烷偶联剂原位改性白炭黑对HNBR复合材料性能的影响。结果表明,硅烷偶联剂原位改性白炭黑填充HNBR胶料的门尼粘度低、拉伸强度高、分散效果好和压缩永久变形小。使用硅烷偶联剂A151原位改性的HNBR胶料的门尼粘度较低,压缩永久变形最小。     

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。     

氢化羧基丁腈橡胶/环氧化POSS复合材料的硫化反应和性能研究

通过溶液共混和硫化成型制备了氢化羧基丁腈橡胶(HXNBR)/环氧环己基POSS复合材料,并进行了硫化性能、动态力学性能、FTIR谱图和交联密度测试。结果表明,环氧化环己基POSS和HXNBR发生交联反应并产生醇羟基;在实验温度范围内,200℃时复合材料硫化效率最佳,正硫化时间(t90)约为10min;复合材料高弹储能模量和交联密度随POSS用量的增大而明显增大,损耗因子降低,玻璃化转变温度提高;交联密度在20～40min区间增加幅度较大,当硫化时间为60min时交联密度有所降低。     

Liquid Natural Rubber as a Viscosity Modifier in Nitrile Rubber Processing

The use of thermally depolymerised liquid natural rubber as a plasticiser in nitrile rubber has been investigated with special reference to the rheological aspects. A comparative evaluation has been made with dibutylphthalate, the ester-type plasticiser commonly used with nitrile rubber. The study revealed that the use of liquid natural rubber as a plasticiser and viscosity modifier improved the processability of the compounds and also enhanced many of the vulcanisate properties. © of SCI.     

Aluminium-Aluminium Bonding by Rubber Blend Based on Epichlorohydrin Rubber and Carboxylated Nitrile Rubber

Rubber blends based on epichlorohydrin rubber and carboxylated nitrile rubber can be used as adhesives for aluminium-aluminium bonding. The bond strength depends on blend composition and moulding conditions, such as time, temperature and pressure. Lewis acid/base type interaction is responsible for this type of adhesion. The failure mechanism of the composites was studied by SEM.     

Aluminium-Aluminium Bonding by Rubber Blend Based on Epichlorohydrin Rubber and Carboxylated Nitrile Rubber

Rubber blends based on epichlorohydrin rubber and carboxylated nitrile rubber can be used as adhesives for aluminium-aluminium bonding. The bond strength depends on blend composition and moulding conditions, such as time, temperature and pressure. Lewis acid/base type interaction is responsible for this type of adhesion. The failure mechanism of the composites was studied by SEM.     

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。