不同增黏树脂在HNBR中的应用研究

研究了几种增黏树脂对HNBR硫化特性、力学性能、热空气老化性能及粘合性能的影响,并讨论了Ricobond1756树脂用量对HNBR性能的影响。结果表明,采用Ricobond1756树脂时,胶料力学强度、耐热空气老化性能最好且粘合性能较优异,最适合作为HNBR用增黏树脂;Ricobond1756用量对HNBR与RFL胶乳处理过的玻璃线绳粘合性能影响不大;可采用添加5.0份用量以下的Ricobond1756树脂来达到提高HNBR与胶浆处理尼龙布粘合性能的目的。     

Influence of molecular parameters and processing conditions on degradation of hydrogenated nitrile butadiene rubbers

The thermomechanical modification of hydrogenated nitrile butadiene rubbers (HNBR) of different molecular parameters was investigated by rheological and light scattering techniques. The influences of acrylonitrile content, degrees of hydrogenation, and Mooney viscosity were examined. A melt blender with Banbury‐type mixing blades was used to condition the rubber samples in the temperature range from 190 to 260°C. Light scattering was used to determine the effect of conditioning on MW and hydrodynamic radius of the rubber molecules. Dynamic viscosity (η′) and storage modulus (G′) were measured for the as‐received and conditioned samples. Experimental results showed that degradation in these rubbers occurred through chain scission and crosslinking. Depending on the molecular parameter, it was found that one of these two mechanisms dominated the degradation process in most brands. Addition of adequate amounts of antioxidants (Irganox 1010 and Irgafos 168) was successful only in preventing degradation by crosslinking. Compared to thermal degradation, thermomechanical degradation was found to be much more severe and progressed at much higher rates. Rheology was found to be a very sensitive technique to structural parameters of the polymers and could be used to detect and identify the mechanism of degradation. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 97: 1432–1441, 2005     

空中加油飞机内套组件工艺技术研究

分析了飞机空中加油机内套组件加工及使用中出现问题的原因，通过对产品结构、模具结构设计的改进及胶料、胶粘剂的选用喷砂模的应用，解决了生产及使用中出现的问题，试验结果表明：内套组件各项性能满足飞机空中加油机的使用性能要求。     

高孔隙度炉法炭黑对丁腈橡胶的补强特点

研究了高孔隙度炉法炭黑N330、П366Э、П267Э和П399Э对不同极性和饱和度的丁腈橡胶、氢化丁腈橡胶硫磺-亚磺酰胺硫化胶及各种无硫磺硫化胶的拉伸强度和电阻率ρv的影响。     

甲基丙烯酸锌补强氢化丁腈橡胶耐老化性能的研究

试验研究甲基丙烯酸锌（ZDMA）补强氢化丁腈橡胶（HNBR）热空气老化前后的物理性能和动态力学性能。结果表明:随着ZDMA用量的增大,HNBR胶料的t₁₀和t₉₀缩短,M_L和M_H增大,硫化胶的邵尔A型硬度和100%定伸应力增大,拉伸强度和拉断伸长率先增大后减小;经热空气老化后,随着老化时间的延长,HNBR硫化胶的邵尔A型硬度和100%定伸应力增大,拉伸强度和拉断伸长率减小;延长老化时间或增大ZDMA用量,HNBR硫化胶的储能模量和损耗模量增大,损耗因子峰值逐渐减小,损耗模量峰值和玻璃化温度逐渐向高温方向移动。     

Effect of structure development on the rheological properties of PVDF/HNBR-based thermoplastic elastomer and its vulcanizates

The present work demonstrates the structure-rheology relationship of novel polyvinylidene fluoride/hydrogenated nitrile rubber blends with special reference to the effect of mixing time, which has not been amply discussed in the literature. In between 50 and 70 wt% rubber content, a yield in complex viscosity and secondary plateau in storage modulus were discerned due to interconnected droplets-matrix morphology manifesting the thermoplastic elastomeric nature of the blends (TPEs). Such network-like structure altered the rheological properties like relaxation time, capillary viscosity, die swell, elastic responses of the TPE with respect to the trend as expected according to the rule of mixing. Interestingly, in the early stages of mixing, when the dispersed size was bigger, the effect of physical network on the rheological properties was suppressed. During dynamic vulcanization (TPV), both lower and higher frequency responses in oscillatory shear flow, steady shear rheological properties, recoverable strain etc. have changed notably with mixing time. For example, although the complex viscosity of the TPV was higher at a lower frequency as compared to its TPE, it was significantly lower at a higher frequency at the beginning of dynamic curing; however, viscosity increased appreciably with time. Temperature-dependendent rheological properties were also influenced with mixing time of the compositions. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020 , 137, 48758.     

硫化体系对氢化丁腈橡胶性能的影响

本文探讨了不同硫化体系对混炼胶硫化特性及硫化胶力学性能、老化性能、压缩模量及压缩永久变形性能的影响。结果表明:含有活性双键的助交联剂能不同程度提高混炼胶的最高转矩,硫化胶的定伸强度,硬度,压缩模量,改善硫化胶的压缩永久变形。其中采用DCP与硫化助剂A并用时,硫化胶的综合性能最好。     

HNBR/CR并用比对共混胶性能的影响

探讨了HNBR/CR并用比对共混胶加工性能、力学性能、耐热老化性能和耐油性能的影响。结果表明,随CR用量的增加,共混胶的硫化效率提高,加工性能逐渐改善,动态生热量降低,力学强度和耐油性能都有所下降。当HNBR/CR并用比大于70/30时,共混胶的拉伸强度和热空气老化后的性能保持率依然较高,且耐油性能优良,可满足一些耐油、耐热场合对胶料的基本性能要求。当并用比小于60/40时,共混胶的力学性能、耐油性能和耐热老化性能下降较为严重。     

Prepared hydrogenated nitrile rubber (HNBR)/organo–montmorillonite nanocomposites by the melt intercalation method

The polymer, Hydrogenated Nitrile‐Butadiene Rubber (HNBR) was melt compounded with organophilic montmorillonite (OMMT). The dispersion of the OMMT in the HNBR matrix was characterized by X‐ray diffraction (XRD), which indicated that at the temperature of 100°C, the organoclay belong to the exfoliated and interlayer structure. The effect of sulfur on the dispersion of OMMT in the polymer matrix was also studied. The vulcanization changed the dispersion of OMMT in polymer matrix greatly and the basal spacing of clay layers is decreased after vulcanization. The mechanical properties, Akron abrasion and the crude oil medium aging‐resistant of HNBR nanocomposites were examined as a function of the OMMT content in the matrix of polymer. The results of the test show remarkable improvement in tensile strength, tear strength, aging‐resistant, and hardness of HNBR nanocomposites than that of unfilled HNBR. It is obvious that the 10 phr of OMMT filled nanocomposites have the best mechanical properties. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010     

HNBR4种补强填充体系的研究

分别研究了炭黑N330,炭黑N550,炭黑N660和炭黑N774对氢化丁腈橡胶（HNBR）硫化特性和力学性能的影响,并考察了4种炭黑在HNBR中的分散度和Payne效应。结果表明,炭黑N550的胶料焦烧时间和正硫化时间均最长,分散度最好。随着炭黑粒径的逐渐增大,硫化胶拉伸强度、定伸应力和硬度均逐渐减小,拉断伸长率却逐渐增大。4种炭黑胶料的Payne效应强弱顺序为炭黑N330〉炭黑N550〉炭黑N660〉炭黑N774。