共查询到17条相似文献,搜索用时 203 毫秒
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研究了抗氧剂GM对SBR/HAF共混胶的硫化特性、力学性能和耐热老化性能的影响,并通过TG分析表征共混胶的耐热稳定性.结果表明,抗氧剂GM具有防止焦烧和软化胶料的作用,随着GM用量的增大,共混胶的伸长率和撕裂强度升高,硬度下降.共混胶的耐热老化性能随抗氧剂GM用量增大而提高,GM用量以3份为宜.TG分析表明,加入抗氧剂... 相似文献
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研究了抗氧剂GM、抗氧剂264和抗氧剂2246对SBR/HAF混炼胶的硫化特性、力学性能和耐热老化性能的影响,并通过TG分析表征混炼胶的耐热稳定性.结果表明,与抗氧剂264和抗氧剂2246相比,添加抗氧剂GM的混炼胶具有更好的防焦烧性能,更高的力学性能以及更优异的耐热老化性能.TG分析表明,在三种抗氧剂中,加入抗氧剂G... 相似文献
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研究了抗氧剂2-叔丁基-6-(3-特丁基-2-羟基-5-甲基苯基)-4-甲基苯酚丙烯酸酯(简称GM)、抗氧剂264和抗氧剂2246对NBR/WCB共混胶的硫化特性、力学性能和耐热老化性能的影响,并通过TG分析表征NBR/WCB共混胶的耐热稳定性。结果表明,与抗氧剂264和抗氧剂2246相比,抗氧剂GM对NBR/WCB共混胶具有防止焦烧、加快硫化速度和软化胶料的作用。添加抗氧剂GM的共混胶比加入抗氧剂264和2246的共混胶具有更优异的耐热老化性能。TG分析表明,在3种抗氧剂中,加入抗氧剂GM的NBR/WCB共混胶的耐热稳定性最高。 相似文献
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NBR/PVC热塑性弹性体耐热老化性能研究 总被引:2,自引:0,他引:2
考察了硫化体系、PVC聚合度、DOP用量、抗氧剂种类及用量对丁腈橡胶/聚氯乙烯(NBR/PVC)热塑性弹性体(TPE)的耐热老化性能的影响。试验结果表明:NBR/PVC:的质量比为70:30时,酚醛树脂硫化体系制备的TPE的耐热老化性能最好;增加PV(:的聚合度,TPE的耐热老化性能提高;DOP用量越大。TPE的耐热老化性能越差;抗氧剂2246对TPE的耐热老化性能最好,其最佳用量为2.0份。 相似文献
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以维生素C和二氧化铈(CeO_2)合成的维生素C-稀土配合物(VCCe)为填料,制备了不含炭黑的氟橡胶(FKM)复合材料,考察了VCCe用量对复合材料硫化特性、物理机械性能、压缩永久变形、耐热氧老化性能和耐臭氧老化性能的影响。结果表明,VCCe具有一定的硫化促进作用,可使FKM混炼胶的焦烧时间和正硫化时间缩短,最大转矩、最小转矩和转矩差值增大;随着VCCe用量的增加,FKM复合材料的压缩永久变形先减小后增大,交联密度、拉伸强度和扯断伸长率均先增大后减小,邵尔A硬度不断增大,且VCCe能够有效改善FKM复合材料的耐热氧老化性能和耐臭氧老化性能,当VCCe为30份时,复合材料的性能最佳。 相似文献
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研究丁苯橡胶(SBR)/轮胎再生橡胶(TRR)用量比对农业轮胎胎面胶性能的影响。结果表明:SBR和TRR总用量为80份或SBR用量为50份时,随着TRR用量增大,混炼胶的硫化速率增大,硫化胶的耐臭氧老化性能提高;SBR/TRR用量比为30/50,20/60和10/70时,炭黑在胶料中的分散性较好;SBR/TRR用量比为10/70时,硫化胶的压缩生热较低;SBR/TRR用量比为10/70和50/0时,硫化胶的耐热氧老化性能较好;SBR/TRR用量比为10/70时,胶料的综合性能较好。 相似文献
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王霞;朱勇平;王炼石;蔡彤旻;张安强 《中国塑料》2010,24(11):43-48
用悬浮接枝共聚法制备了乙烯-1-丁烯共聚物(PEB)与甲基丙烯酸甲酯和丙烯腈共聚物的接枝共聚物(PEB-g-MAN),并用其增韧苯乙烯-丙烯腈共聚物(SAN)。用动态力学分析、热重分析、人工气候老化和热氧老化试验等方法研究了PEB-g-MAN/SAN共混物的热性能与耐老化性能。结果表明,PEB-g-MAN/SAN共混物的PEB组分和SAN组分的玻璃化转变温度(Tg)之差明显低于PEB弹性体与SAN树脂的Tg之差,表明PEB-g-MAN与SAN树脂具有良好的相容性;PEB-g-MAN/SAN共混物的热稳定性明显优于SAN树脂,耐气候老化黄变性能和热氧老化后缺口冲击强度保持率明显优于丙烯腈-苯乙烯-丁二烯共聚物(ABS),而热氧老化后的拉伸、弯曲强度则稍逊于ABS。 相似文献
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研究了3种硫化助剂对MVQ/EPDM共混胶硫化特性、力学性能、耐热老化性能、高温压缩永久变形性能及动态力学性能的影响。结果表明,添加硫化助剂HVA—2的共混胶焦烧时间和正硫化时间均明显缩短;添加硫化助剂丁羟胶和TAIC的共混胶焦烧时间和正硫化时间均变化不大;添加硫化助剂丁羟胶的共混胶具有最好力学性能、耐热老化性能和压缩永久变形性能,其玻璃化温度也比空白样的低近3℃。 相似文献
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Influences of EPDM-g-MA as a compatibilizer and a phenolic antioxidant on oil and thermal aging resistance in 50/50 CPE/NR blends were investigated. It has been found that EPDM-g-MA could decrease phase size of the blend system, indicating compatibilizing effect. The optimal concentration of EPDM-g-MA is 1 phr. Beyond this concentration, phase size starts to increase. The addition of phenolic antioxidant apparently decreases the phase size in blends. This is probably due to the improvement in a thermal stabilization of NR phase in blends provided by the antioxidant, which leads to a reduction in phase coalescence during blending. In addition, the results of oil and thermal aging resistance are in good agreement with the morphological results, indicating that the oil resistance and thermal aging properties based on relative tensile strength in the 50/50 CPE/NR blends are strongly controlled by the size of the NR dispersed phase in CPE matrix. The smaller the dispersed phase size, the higher the resistance to oil and thermal aging. 相似文献
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Curing characteristics,morphology, thermal stability,mechanical properties,and irradiation resistance of methylethylsilicone/methylphenylsilicone rubber blends 下载免费PDF全文
Methylethylsilicone rubber (MESR)/methylphenylsilicone rubber (MPSR) blends were cured with 2,5‐dimethyl‐2,5‐di(tert‐butylperoxy)hexane. The curing characteristics, morphology, thermal behaviors, mechanical properties at different temperatures, radiation resistance, and thermal aging resistance of the MESR/MPSR blends were investigated. The results show that a high MPSR content could decrease the optimum curing time and improve the scorch safety. Dynamic mechanical analysis revealed that the glass‐transition temperature of the blends increased slightly with the addition of MPSR. Scanning electron microscopy showed that MESR and MPSR had good compatibility in the blends. Thermogravimetric analysis indicated that the thermal stability of the blends increased with increasing quantity of MPSR. The blends had excellent mechanical properties at low temperatures. However, these properties were significantly reduced when the temperature was increased. Moreover, changes in the mechanical properties decreased with increasing MPSR content at high temperatures, especially at temperatures higher than 100°C. In addition, the radiation resistance and thermal aging resistance of the blends increased with increasing MPSR content. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131, 40529. 相似文献