HNBR/NBR共混物的静态硫化

研究了混炼工艺、硫化体系、氢化丁腈橡胶（ＨＮＢＲ）的饱和度及并用比对ＨＮＢＲ／丁腈橡胶（ＮＢＲ）共混物性能的影响,并通过ＴＥＭ和ＤＭＡ考察了共混物的结构和相容性。结果表明,混炼工艺对性能的影响水大;采用质量份分别为过氧化二异丙苯４、硫黄０．３和促进剂ＣＺ１．５的硫化体系,选择饱和度为９５％的ＨＮＢＲ与ＮＢＲ共混,共混物有较好的物理机械性能和热空气老化性能;共混物物理机械性能随ＨＮＢＲ用量的增加面提     

EVM/NBR动态硫化共混物性能的研究

研究了橡胶型乙烯醋酸乙烯酯共聚物（ＥＶＭ）／ＮＢＲ共混比、硫黄和叔丁基酚醛树脂（２４０２树脂）硫化体系对共混物性能的影响，并对比了动态硫化和静态硫化共混物在性能上的差异。试验结果表明，ＥＶＭ／ＮＢＲ共混比显著影响共混物的力学性能，而采用ＮＢＲ预先动态硫化的方法后，共混物胶料的挤出口型膨胀率明显减小，老化性能得到改善，同时减弱了硫黄和２４０２树脂等硫化体系对ＥＶＭ硫化的影响，使多种硫化体系可以共存于共混物中。ＤＳＣ分析表明ＥＶＭ／ＮＢＲ动态硫化共混物只有一个玻璃化温度，且介于ＥＶＭ和ＮＢＲ之间，说明ＥＶＭ和ＮＢＲ具有良好的相容性。     

NBR/聚丙烯酸酯橡胶共混物动态硫化的研究

ＮＢＲ的溴化酚醛树脂硫化体系和聚丙烯酸酯橡胶（ＡＣＭ）的硫化剂ＡＢＳ会相互干扰，产生硫化不相容性，导致ＮＢＲ，ＡＣＭ和ＮＢＲ／ＡＣＭ共混物性能下降。通过在ＮＢＲ／ＡＣＭ共混物中加入溴化酚醛树脂对ＮＢＲ进行动态硫化，然后加入ＡＢＳ对ＡＣＭ进行静态硫化的方法，能够较好地解决这两种不相容硫化体系的相容性问题，所得到的共混物表现出良好的物理性能，且优于相应的静态硫化共混物。同时考察了ＮＢＲ／ＡＣＭ的共混比对共混物性能的影响。     

氯化聚乙烯/NBR动态硫化共混物性能的研究

在氯化聚乙烯（ＣＰＥ）和ＮＢＲ中加入促进剂ＮＡ２２首先对ＣＰＥ进行动态硫化,然后加入硫黄对ＮＢＲ进行静态硫化制备了ＣＰＥ／ＮＢＲ共混物。考察了促进剂ＮＡ２２用量、ＣＰＥ／ＮＢＲ共混比以及动态硫化温度对共混物性能的影响。结果表明,动态硫化是解决ＣＰＥ与ＮＢＲ相容性问题的有效手段;促进剂ＮＡ２２存在饱和点,用量以２份为宜;ＣＰＥ用量增大,动态硫化共混物交联密度则略有升高;动态硫化温度提高（１６０～１８０℃）,交联密度增大。     

动态硫化PVC/SBR共混体系的研究

采用动态硫化法制备了ＰＶＣ／ＳＢＲ共混物，考察了橡塑比、硫化体系、相容剂及ＰＶＣ交联对共混物性能的影响。结果表明，当ＰＶＣ／ＳＢＲ并用比为７５／２５，相容剂ＮＢＲ／氯化聚乙烯并用比为２．５／２．５，采用半有效或半有效加２份交联剂ＤＣＰ的硫化体系时，共混物综合性能较好。在ＰＶＣ中加入０．４份促进剂ＮＡ－２２可明显改善共混物的压缩永久变形。     

不同添加剂对自硫化CSM/XNBR共混物性能的影响

在没有任何硫化剂的条件下,氯磺化聚乙烯（ＣＳＭ）和羧基丁腈橡胶（ＸＮＢＲ）的共混物（质量比１∶１）能在１８５℃×６０ｍｉｎ下模压硫化。溶胀分析、凝胶测定、硫化曲线及红外谱图分析证实了ＣＳＭ中的氯磺酰基和ＸＮＢＲ中的羧基之间发生了交联反应。共混体系能用５０份炭黑增强,３０份氯化石蜡增塑。加入ＣＳＭ的稳定剂增加了共混硫化胶的凝胶质量分数。碱性物质能大幅度提高自硫化ＣＳＭ／ＸＮＢＲ共混物的强度。共混物的耐热氧老化性能尚待提高。     

过氧化物动态硫化的NBR/POM共混物性能的研究

采用过氧化物硫化体系用动态硫化方法制备了丁腈橡胶／聚甲醛（ＮＢＲ／ＰＯＭ）热塑性弹性体。研究了硫化体系、橡塑比对共混物性能的影响。实验结果表明．采用２，５－二甲基－２，５－双（叔丁基过氧基）己烷硫化体系硫化效果较好．共混物的综合性能优异；随着ＰＯＭ用量增加．共混物的拉伸强度略有增加，表观粘度降低，加工性能变好，电绝缘性能、老化性能和耐油性能均得到明显改善。     

HNBR／NBR共混物性能研究

对ＨＮＢＲ／ＮＢＲ共混的相容性和硫化体系进行了研究,探讨了共混比、填料等对共混胶静态力学性能的影响以及不同共混比胶料的动态力学性能,并分析了共混胶的加工性能。结果表明：选择适当的硫化交联剂,提高共混胶的共硫化是获得优异性性能的关键。甲基丙烯酸镁（ＭＭＧ）对共混胶有明显的增硬作用,并可适当改善共混胶的物理机械性能和耐热老化性能。共混胶有着较好的加工性能,并可降低混炼胶料的成本     

氯化丁基橡胶/天然橡胶共混物性能的研究

研究了共混比及硫化体系对氯化丁基橡胶（ＣＩＩＲ）／天然橡胶（ＮＲ）共混物性能的影响，探讨了老化温度及防老剂对氧化锌／促进剂ＴＭＴＤ／促进剂ＤＭ硫化体系硫化的ＣＩＩＲ／ＮＲ共捐物耐热氧老化性能的影响。试验结果表明，氧化锌／促进剂ＴＭＴＤ／促进剂ＤＭ（５．０／１．５／１．０）硫化体系硫化的ＣＩＩＲ／ＮＲ共混物的拉伸强度和扯断伸长率与按共混比计算的平均值差别较小，尤其是拉伸强度与计算值完全一致。当共混物中ＣＩＩＲ用量超过５０份时，共混物的耐热氧老化性能明显改善。不同防老剂对ＣＩＩＲ／ＮＲ（５０／５０）共混物热氧老化的防护效能大小顺序为ＲＤ及４０１０＞４０１０ＮＡ＞ＭＢ＞Ｄ。防老剂ＲＤ先加入到ＮＲ中后再与ＣＩＩＲ共混．其防护效能更佳。     

PVC／SBR热塑性弹性体的研制

以ＡＢＳ、氯丁橡胶（ＣＲ）、马来酸酐（ＭＡ）接枝ＳＢＲ（ＳＢＲ－ＭＡ）作增容剂对ＰＶＣ／ＳＢＲ的共混比、增容剂、增塑剂用量做了优化选择。同时对动态硫化ＰＶＣ／ＳＢＲ的硫化体系、硫化工艺条件进行了探讨,并比较了动态硫化对共混体性能的影响。结果表明：ＰＶＣ／ＳＢＲ为８０／２０,增容剂ＡＢＳ／ＳＢＲ－ＭＡ为５／５时,选用半有效硫化体系,１６５℃下动态硫化６ｍｉｎ,共混物综合性能最佳     

Behavior of zinc complex of bis(N-phenylsulfonyldithiocarbimate) as accelerator in the vulcanization of nitrile rubber compounds

Chemical complexes containing N-R-sulfonyldithiocarbimates have been looked at as potential substitutes for N-R-dithiocarbamates as accelerators for the vulcanization process, especially due to their structural similarities and, most importantly, for the capability of this last compound to not form nitrosamines during the vulcanization process. The zinc complex bis(N-phenylsulfonyldithiocarbimate)zincate(II) (n-PSC) of tetrabutylammonium was tested in nitrile rubber compositions and its performance compared with bis(4-methylphenylsulfonyldithiocarbimate)zincate(II) (MPSC) of tetrabutylammonium and also with commercial accelerators. The complex n-PSC imparted values of cure times intermediate between those given by ultrafast and moderate commercial accelerators. Nitrile rubber compounded with n-PSC also presented similar mechanical properties as compared with the commercial accelerators except for an inferior aging resistance. Concerning the two complexes, n-PSC was found to promote better properties such as optimum cure time, crosslink density, and elongation at break as compared with MPSC. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136, 47211.     

配方体系对HNBR/HXNBR并用胶门尼黏度和硫化特性的影响

采用门尼黏度仪和无转子硫化仪研究了氢化羧基丁腈橡胶(HXNBR)的添加量、硫化/活化体系和补强体系对氢化丁腈橡胶(HNBR)/HXNBR并用胶门尼黏度和硫化特性的影响.结果表明,随着HXNBR用量的增加,HNBR/HXNBR并用胶的门尼黏度呈线性增加趋势;过氧化二异丙苯(DCP)/三羟甲基丙烷三甲基丙烯酸酯(TRIM)...     

动态硫化丁腈橡胶/聚丙烯热塑性弹性体的耐油性能

研究了不同相容剂、硫化体系、增塑剂以及成型温度对动态硫化丁腈橡胶／聚丙烯热塑性弹性体(NBR／PPTPV)耐油性能的影响。结果表明,当端氨基液体丁腈橡胶(ATBN)为5份,马来酸酐接枝聚丙烯(MP)为10份时,ATBN／MP增容的TPV具有优异的耐油性能;酚醛树脂硫化TPV的耐油性能比过氧化二异丙苯(DCP)、溴化树脂硫化的TPV都要优越;聚酯增塑TPV的耐油性能优于邻苯二甲酸二辛酯(DOP)增塑的TPV;热成型温度对TPV的耐油性能影响不大。     

橡胶硫化曲线变化的数学模型拟合——Ⅱ.转矩上升的硫化曲线

用孟山都流变仪测定了1种NBR—18硫化体系和2种NSR—26硫化体系在170℃下的硫化曲线,三者的转矩P均随硫化时间t的增加而增大.用数学模型y(P)=f_1(t)+f_2(t)来描述P的变化,各试样f_1(t)的函数形式相同,即f_1(t)=A cxp[-K_1(t-t_o)];f_2(t)的函数形式因试样不同而异,试样1为f_2(t)=B-K_2(t-t_o).试样2为f_2(t)=B cxp[-K_2(t-t_o)],试样3为f_3(t)=[B+K_2(t-t_o)]~(-1).结果表明,各试样P的实验值和计算值基本吻合.     

Resin‐vulcanized NBR: Suitability of rheometric parameters for the calculation of cure kinetic constants

Several mechanisms can be used to describe the vulcanization process, and study of the reactions that actually take place can be done through different techniques. In this work, two methods that used rheometric parameters to calculate the kinetic constant were compared for the cure of nitrile rubber with a system of phenolic resin, polychloroprene, and zinc oxide. The formulations and data analysis were based on a complete factorial experiment design. The results enabled the identification of the influence of each parameter involved in the vulcanization process and the suitability of the two methods used. © 2002 John Wiley & Sons, Inc. J Appl Polym Sci 84: 505–513, 2002; DOI 10.1002/app.2354     

Effect of network heterogeneities on the physical properties of nitrile rubbers cured with dicumyl peroxide

The scope of this study is to continue our earlier studies on the peroxide curing of diene elastomers. The effect of peroxide content and temperature on the curing and mechanical properties of NBR and H‐NBR rubbers with different acrilonitrile content was evaluated. Experimental evidence indicates that saturated rubbers behave as expected whereas in unsaturated nitrile rubbers abstraction of allylic hydrogen and addition to the double bonds can act as mechanism of crosslinking, the weight of each mechanism is dependent of DCP content and curing temperature. The addition mechanism produces densely crosslinked zones or clusters, generating a heterogeneous network with effect on the vulcanizate properties. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 103: 3377–3382, 2007     

NB R / Zn (MAA) 2合金的硫化与交联

用硫化仪研究了NBR／Zn(MAA)2合金的硫化特性,结果表明,随着Zn(MAA)2用量的增大,合金的硫化速度提高,焦烧时间缩短,表现活化能下降,平衡溶胀及平衡应力一应变实验表明,NBR／Zn(MAA)2合金的交联密度随Zn(MAA)2用量的增大而增大。差示扫描量热分析表明合金内部发生了复杂的化学交联,同时Zn(MAA)2均聚物与NBR交联网络互相贯穿缠结,起到了强迫相容的作用。     

动态硫化法制备丁腈橡胶/二元共聚氯醚密封材料

采用动态硫化法制备了丁腈橡胶（NBR-41）／二元共聚氯醚（ECO）共混胶,对其结构进行了表征,研究了其物理机械性能、流变性能和动态力学性能等,并与常规共混胶进行了对比。结果表明,动态硫化胶中NBR-41为分散相,ECO为连续相;与NBR-41／ECO常规共混胶相比,NBR-41／ECO动态硫化胶具有高拉伸强度、低压缩永久变形、低损耗、良好的加工性能及耐低温性能;NBR-41／ECO动态硫化胶的气密性能与ECO相当,而耐油性能优于ECO。     

A novel accelerator combination for the low temperature curing of silica‐filled NBR compounds

Zinc salts of ethyl, isopropyl, and butyl xanthates were prepared in the laboratory. The effect of these xanthates in combination with zinc diethyldithiocarbamate (ZDC) on the vulcanization of silica‐filled NBR compounds has been studied at different temperatures. The cure times of these compounds were compared with that of NBR compounds containing tetramethylthiuram disulphide/dibenzthiazyl disulphide. The rubber compounds with the xanthates and ZDC were cured at various temperatures from 60 to 150°C. The sheets were molded and properties such as tensile strength, tear strength, crosslink density, elongation at break, compression set, abrasion resistance, flex resistance, heat buildup, etc. were evaluated. The properties showed that zinc salt of xanthate/ZDC combination has a positive synergistic effect on the cure rate and mechanical properties of NBR compounds. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 102: 5680–5683, 2006