回归分析法研究补强剂对丁腈橡胶/氯化聚乙烯橡胶并用胶性能的影响

用回归分析法研究快压出炭黑(FEF)和甲基丙烯酸锌(ZDMA)用量对丁腈橡胶(NBR)/氯化聚乙烯橡胶(CM)并用胶性能的影响。结果表明:在试验范围内,随着FEF用量的增大,NBR/CM并用胶的邵尔A型硬度、拉伸强度、撕裂强度以及耐油性能提高,拉断伸长率下降,压缩永久变形减小;随着ZDMA用量的增大,NBR/CM并用胶的邵尔A型硬度、拉伸强度、撕裂强度以及耐油性能提高,拉断伸长率略有下降,压缩永久变形有所增大。     

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。     

改善丁腈橡胶仨元乙丙橡胶并用胶相容性的研究

研究氯化聚乙烯（CPE）和甲基丙烯酸锌（ZDMA）对丁腈橡胶（NBR）／三元乙丙橡胶（EPDM）并用胶相容性和物理陛能的影响。结果表明：随着CPE用量增大,NBR／EPDM并用胶的硬度、100％定伸应力、拉伸强度和撕裂强度呈增大趋势;随着ZDUA用量增大,NBR／EPDM并用胶的硬度、100％定伸应力和撕裂强度呈增大趋势,ZDMA用量过大导致胶料的拉伸强度等物理陛能下降,ZDMA用量以5～10份为宜;添加CPE或ZDMA,EPDM／NBR并用胶的相容性得到明显改善,zDMA在NB眦PDM并用胶中起补强和增容的作用。     

甲基丙烯酸锌对乙烯-辛烯共聚物/聚丙烯热塑性硫化胶性能的影响

以双叔丁基过氧化二异丙基苯(BIPB)为硫化剂、甲基丙烯酸锌(ZDMA)为填料,采用动态硫化法制备了乙烯-辛烯共聚物(POE)/聚丙烯(PP)热塑性硫化胶(TPV),研究了ZDMA的热性能,并考察了ZDMA与BIPB对混炼胶硫化特性及TPV物理机械性能的影响,表征了TPV的微观形貌。结果表明,ZDMA处于炼胶温度时不会发生分解和降解,且在165℃左右与BIPB分解产生的自由基发生反应,因此,加工温度确定为170℃左右;随着BIPB用量的增加,POE/PP TPV的拉伸强度和撕裂强度先增大后减小,扯断伸长率降低,而邵尔A硬度增大,最佳BIPB用量为1.0份;随着ZDMA用量的增加,POE/PP混炼胶的硫化速率和相对交联密度逐渐增大,POE/PP TPV的拉伸强度和撕裂强度先增大后减小,扯断伸长率和永久变形逐渐降低,邵尔A硬度和100%定伸应力呈上升的趋势,ZDMA最佳用量为10~15份;添加ZDMA的TPV断面粗糙,界面间的相互作用力增强。     

ZDMA/白炭黑填充HNBR的结构与性能

以甲基丙烯酸锌(ZDMA)/白炭黑填充氢化丁腈橡胶(HNBR),研究ZDMA/白炭黑并用比、硫化剂DCP用量及硫化时间对HNBR硫化胶结构和性能的影响。结果表明,在填料总量不变的前提下,随着白炭黑用量的增大,ZDMA/白炭黑填充HNBR硫化胶拉伸强度和压缩永久变形先减小后增大,填料分散性下降;随着硫化剂DCP用量的增大,ZDMA/白炭黑填充HNBR硫化胶物理性能和动态性能提高,填料分散性变好。当ZDMA/白炭黑并用比为10/30、硫化剂DCP用量为5～6份、一段硫化条件为160℃×45min、二段硫化条件为150℃×(9～12)h时,ZDMA/白炭黑填充HNBR硫化胶综合性能较好。     

原位生成ZDMA对CM性能的影响

在橡胶型氯化聚乙烯(CM)中加入氧化锌(ZnO)和甲基丙烯酸(MAA)原位生成甲基丙烯酸锌(ZDMA),考察了ZDMA对CM性能的影响。结果表明,在过氧化物硫化体系中,ZDMA用作补强剂并随其用量的增大,CM橡胶的硫化速度和硫化程度明显提高;ZDMA用量为30~40份时,硫化胶拉伸强度达到最大值20MPa,拉断伸长率达到400%以上,硬度几乎呈线性增大,但老化后拉伸性能保持率较差。在CM硫化胶中,原位生成的ZDMA补强效果好于原位生成MDMA。     

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。     

ZDMA补强杜仲胶形状记忆复合材料的制备及性能

制备了原位生成甲基丙烯酸锌(ZDMA)增强的杜仲橡胶形状记忆复合材料,采用过氧化物硫化体系,分别考察了不同的硫化剂用量以及ZDMA生成量对杜仲胶复合材料的硫化特性、力学性能、结晶性能、形状记忆性能的影响。结果表明,在原位生成ZDMA量一定时,适度的交联可以使复合材料保持良好的力学性能,并获得优异的形状记忆性能;在硫化剂用量一定时,加入一定量的ZDMA可以提升硫化剂的硫化效率,提高复合材料的力学性能,同时获得优异的形状记忆性能。     

甲基丙烯酸锌对NR耐老化性能的影响

研究了助交联剂甲基丙烯酸锌(ZDMA)用量对NR耐热氧老化性能、耐伸张和压缩疲劳老化性能的影响。结果表明,热氧老化或伸张疲劳后的硫化胶,随着ZDMA用量的增加,力学性能保持率先增大后减小。当硫黄用量为1.5份,ZDMA用量为2份时,耐热氧老化性能及耐伸张和压缩疲劳老化性能达到最优。     

EPDM/NBR共混胶硫化体系的研究

研究了过氧化物DCP、DCP/S并用硫化体系及共交联剂ZDMA的加入对三元乙丙胶/丁腈胶(EPDM/NBR)共混胶性能的影响。研究表明:在过氧化物硫化体系中,随DCP用量的增加,共混胶综合性能先提高后降低,DCP用量为3份时性能达到最佳;DCP/S并用硫化体系中,随硫磺和促进剂加入量的增加,共混胶硫化速度提高,但综合力学性能降低;共交联剂ZDMA由0份增加至15份,共混胶力学性能显著增加,老化性能没有改善。     

DMA analysis of the damping of ethylene–vinyl acetate/acrylonitrile butadiene rubber blends

The mechanical and damping properties of blends of ethylene–vinyl acetate rubber (VA content > 40% wt) (EVM)/acrylonitrile butadiene rubber (NBR), with 1.4 phr BIPB [bis (tert‐butyl peroxy isopropyl) benzene] as curing agent, were investigated by DMA and DSC. The effect of chlorinated polyvinyl chloride (CPVC), silica, carbon black, and phenolic resin (PF) as a substitute curing agent, on the damping and mechanical properties of EVM/NBR blends were studied. The results showed that 10 phr CPVC did not contribute to the damping of EVM700/NBR blends; Silica could dramatically improve the damping of EVM700/NBR blends because of the formation of bound rubber between EVM700/NBR and silica, which appeared as a shoulder tan δ peak between 20 and 70°C proved by DMA and DSC. This shoulder tan δ peak increased as the increase of the content of EVM in EVM/NBR blends. The tensile strength, modulus at 100% and tear strength of the blend with SiO₂ increased while the elongation at break and hardness decreased comparing with the blend with CB. PF, partly replacing BIPB as the curing agent, could significantly improve the damping of EVM700/NBR to have an effective damping temperature range of over 100°C and reasonable mechanical properties. Among EVM600, EVM700, and EVM800/NBR/silica blend system, EVM800/NBR/silica blend had the best damping properties. The EVM700/NBR = 80/10 blend had a better damping property than EVM700/NBR = 70/20. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012     

NBR/EVM并用胶料的性能研究

文中主要研究了NBR/EVM(丁腈橡胶/乙烯醋酸乙烯酯)不同配比共混胶料的力学性能、耐老化性能、耐油性能、耐低温性能,耐高温性能和硫化特性.结果表明,随着EVM含量的增加,NBR/EVM硫化胶的拉伸强度、拉断伸长率、回弹性和压缩永久变形有明显改善,硬度和100％定伸应力呈下降趋势;脆性温度明显降低,显著改善了低温性能;耐老化性能得到改善;耐油性能下降.热失重分析表明,EVM明显改善了NBR胶料的耐高温性能.对硫化体系的研究表明,NBR/EVM并用胶料适合用过氧化物硫化.     

In situ reactive compatibilized polypropylene/nitrile butadiene rubber blends by zinc dimethacrylate: Preparation,structure, and properties

This study demonstrated an approach of compatibilization between polypropylene (PP) and nitrile butadiene rubber (NBR) by using zinc dimethacrylate (ZDMA) as a reactive compatibilizer in the presence of peroxides. The PP/NBR/ZDMA ternary blends with improved mechanical properties were successfully prepared via peroxide dynamic vulcanization. The resultant blends exhibited a significant increase in mixing torque and complex viscosity after incorporation of ZDMA. Morphology studies showed that the addition of ZDMA reduced the size of the crosslinked NBR phase. Transmission electron microscopy (TEM) combined with scanning electron microscopy (SEM) verified that the possible reactions between ZDMA, NBR, and PP increased the interfacial thickness and improved the compatibility between NBR and PP phase. Crystallization behavior analysis indicated that incorporation of ZDMA promoted the nucleation process of PP. Thermal gravimetric analysis (TGA) showed that the maximum degradation temperature was increased by ZDMA. POLYM. ENG. SCI., 54:2321–2331, 2014. © 2013 Society of Plastics Engineers     

Study on the damping of EVM based blends

The mechanical and damping properties of blends of ethylene‐vinyl acetate rubber(VA content >40 wt %) (EVM)/nitrile butadiene rubber (NBR) and EVM/ethylene‐propylene‐diene copolymer (EPDM), both with 1.4 phr BIPB (bis (tert‐butyl peroxy isopropyl) benzene) as curing agent, were investigated by DMA. The effect of polyvinyl chloride (PVC), chlorinated polyvinyl chloride (CPVC), and dicumyl peroxide (DCP) on the damping and mechanical properties of both rubber blends were studied. The results showed that in EVM/EPDM/PVC blends, EPDM was immiscible with EVM and could not expand the damping range of EVM at low temperature. PVC was miscible with EVM and dramatically improved the damping property of EVM at high temperature while keeping good mechanical performance. In EVM/NBR/PVC blends, PVC was partially miscible with EVM/NBR blends and remarkably widened the effective damping temperature range from 41.1°C for EVM/NBR to 62.4°C, while CPVC mixed EVM/NBR blends had an expanded effective damping temperature range of 63.5°C with only one damping peak. Curing agents BIPB and DCP had a similar influence on EVM/EPDM blends. DCP, however, dramatically raised the height of tan δ peak of EVM/NBR = 80/20 and expanded its effective damping temperature range to 64.9°C. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2011     

ZDMA/NBR纳米复合材料的性能研究

研究了甲基丙烯酸锌（ZDMA）/NBR纳米复合材料的静态和动态力学性能，并与炭黑N220/NBR体系进行了对比。试验结果表明，ZDMA/NBR胶料的硫化时间应比正硫化时间适当延长。与炭黑N220/NBR体系相比，ZD-MA/NBR硫化胶的邵尔A型硬度、拉伸强度、扯断伸长率、100%定伸应力和撕裂强度均较高，且具有更好的耐热空气老化性能和耐热油性能，ZDMA/NBR胶料的贮存模量较高，动态压缩生热较小，但动态压缩永久变形较大。     

炭黑/纳米粘土/甲基丙烯酸锌并用对NBR硫化胶的协同补强效应

采用正交试验法．研究了炭黑、纳米粘土和甲基丙烯酸锌3种补强剂并用对丁腈橡胶（NBR）综合性能的影响。优选了补强剂的并用配比，当炭黑／纳米粘土／甲基丙烯酸锌的质量比为1／0．7／0．3时，NBR的综合性能较好。进一步研究了炭黑／纳米粘土／甲基丙烯酸锌补强剂并用对NBR硫化胶的协同补强效应。NBR硫化胶补强性的提高，一方面需要粒子与大分子之间有较强的结合力，另一方面也需要粒子表面上的分子产生滑移。     

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。     

Effect of magnesium methacrylate and zinc methacrylate on bond properties of thermal insulation material based on NBR/EPDM blends

To improve the bond property between thermal insulation composites and metal surface, magnesium methacrylate (MDMA) and zinc methacrylate (ZDMA) were added into NBR/EPDM blends, respectively. The results indicated that the dispersion of MDMA powder was very well and its content changes much smaller in the composites than that of ZDMA. As a result, with the dosage of MDMA increasing from 0 phr to 7 phr, the polarity of MDMA/composites was improved gradually due to the increasing of ionic crosslink density and the decreasing of contact angle. Therefore, the bond strength of the composites to metal increased continuously. And the failures of bonding samples were all in MDMA/composites. After adding ZDMA instead of MDMA into the rubber, however, ZDMA powder would agglomerate during being vulcanized. Therefore, the bond strength of the composites firstly increased slightly and then decreased sharply once ZDMA was over 2 phr, whereas the contact angle of ZDMA/composites is much lower than that of MDMA/vulcanizates. Moreover, all the bonding samples failed at the interface of metal. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009