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研究4种环保型增塑剂TOTM(偏苯三酸三辛酯),BXA-N{己二酸二[2-(2-丁氧基乙氧基)乙酯]},A-8000(己二酸聚酯)和TP-759(聚醚和聚酯的混合物)对丁腈橡胶(NBR)/聚氯乙烯(PVC)共混胶性能的影响。结果表明:增塑剂的相对分子质量和分子结构是影响NBR/PVC共混胶性能的主要因素;添加增塑剂TOTM和A-8000的硫化胶物理性能较好;添加增塑剂BXA-N和TP-759的硫化胶更耐IRM903#油和燃油C的渗入,在燃油C中浸泡后物理性能变化更小;添加增塑剂A-8000的硫化胶的耐压缩永久变形性能和耐热空气老化性能较好。在4种环保型增塑剂中,增塑剂A-8000更适用于NBR/PVC共混胶。 相似文献
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《橡胶科技》2020,(4)
研究4种环保型增塑剂TOTM(偏苯三酸三辛酯),BXA-N{己二酸二[2-(2-丁氧基乙氧基)乙酯]},A-8000(己二酸聚酯)和TP-759(聚醚和聚酯的混合物)对丁腈橡胶(NBR)/聚氯乙烯(PVC)共混胶性能的影响。结果表明:增塑剂的相对分子质量和分子结构是影响NBR/PVC共混胶性能的主要因素;添加增塑剂TOTM和A-8000的共混胶物理性能较好;添加增塑剂BXA-N和TP-759的共混胶更耐IRM903~#油和燃油C,在燃油C中浸泡后物理性能变化更小;添加增塑剂A-8000的共混胶的耐压缩永久变形性能和耐热空气老化性能较好。在4种环保型增塑剂中,增塑剂A-8000更适用于NBR/PVC共混胶。 相似文献
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研究4种增塑剂(RS107,RS735,TP95,TP759)对羧基型丙烯酸酯橡胶(ACM)性能的影响。结果表明:添加增塑剂可以明显改善羧基型ACM胶料的加工性能,同时有延迟硫化的效果;当增塑剂用量相同时,4种增塑剂对羧基型ACM硫化胶物理性能的影响差异较小,硫化胶在1#油中浸泡后体积变化率差异不大;随着增塑剂用量的增大,硫化胶的硬度和拉伸强度降低,拉断伸长率和压缩永久变形增大,热空气老化后的拉伸强度变化率和拉断伸长率变化率均增大,在1#油中浸泡后体积变化增大,在3#油中浸泡后体积变化减小,脆性温度降低。增塑剂RS735和TP759因其硫化胶的耐热空气老化性能优异而更适合在油、高温工况下使用。 相似文献
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研究不同牌号乙烯丙烯酸酯橡胶(AEM)及聚酯/聚醚混合型增塑剂种类和用量对硫化胶性能的影响。结果表明:AEM Vamac G硫化胶的耐低温性能较好,而AEM Vamac GLS硫化胶的物理性能、耐老化性能和耐油性能较好,选择并用比为50/50的AEM Vamac G/AEM Vamac GLS并用胶作为主体材料,硫化胶的物理性能、耐油性能和耐低温性能可更好地平衡;添加增塑剂TP-759的硫化胶的耐低温性能较好,添加增塑剂RS-735的硫化胶的耐热老化性能较好,两者耐油性能相当;随着增塑剂用量的增大,硫化胶的耐低温性能提高,拉伸强度降低,拉断伸长率和压缩永久变形增大,油浸泡后体积变化率减小。 相似文献
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研究新型环保橡胶助剂增塑剂D810、分散剂WBP-100、助交联剂Ricobond 1756和改性酚醛树脂对氢化丁腈橡胶(HNBR)性能的影响及其在HNBR汽车同步带中的应用。结果表明:增塑剂D810可有效代替传统增塑剂TOTM和TP-95用于HNBR中;分散剂WBP-100可改善HNBR的拉伸性能和耐热老化性能,提高硫化效率,在一定程度上延长HNBR汽车同步带的使用寿命;助交联剂Ricobond1756用量为2.5份可改善HNBR胶料的拉伸性能,汽车同步带动态疲劳寿命延长约13%;新型改性酚醛树脂可有效提高HNBR胶料与尼龙帆布和玻璃纤维线绳的粘合性能。 相似文献
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环保型增塑剂腰果壳油对丁腈橡胶性能的影响 总被引:5,自引:0,他引:5
研究了腰果壳油(CNSL)用量对丁腈橡胶胶料的硫化特性和硫化胶性能的影响,并与使用邻苯二甲酸二辛酯和环氧大豆油作为增塑剂进行了对比。结果表明,在0~30份(质量)用量内,加入CNSL后胶料的焦烧时间和正硫化时间有所缩短。与加入相同用量的邻苯二甲酸二辛酯和环氧大豆油的胶料及硫化胶相比,使用CNSL的胶料在硫化曲线上的最小转矩和最大转矩以及硫化胶的硬度、定伸应力和耐ASTM1#标准油体积增加率较小;硫化胶的拉伸强度、撕裂强度、扯断伸长率和耐ASTM3#标准油体积增加率较大;硫化胶的耐热空气老化性能较好。 相似文献
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我厂3号回转窑(Φ4m×60m)生产线在1996年年底由SP窑(产量912t/d)改为NSP窑(产量1320t/d),预分解系统为四级旋风预热器带离线式分解炉 相似文献
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乙烯酮(双乙烯酮)是十分重要的化工中间体,其下游产品较多。江苏某化工厂开发生产乙烯酮(双乙烯酮)下游产品三十多个,年生产规模三万多吨,是国内以乙烯酮(双乙烯酮)为中间体生产精细化学品的综合骨干企业。针对乙烯酮(双乙烯酮)下游产品废水特点,该厂结合企业实际,开展了产品优化,结构调整,清洁生产,资源循环利用,节水降耗等工作,从源头削减了污染物的生产。同时投资二千多万元新建预处理装置三套,6000m3/d废水生化处理装置一套,使全厂乙烯酮(双乙烯酮)下游产品的废水得到了有效的治理。 相似文献
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The miscibility of various amorphous polybutadienes with mixed microstructures of 1,4 addition units (cis, 1,4 and trans 1,4) and 1,2 addition units have been investigated. The studies here involved optical transparency, differential scanning calorimetry, and small angle light scattering. It was found that a 90 percent (cis) 1, 4 addition polybutadiene was immiscible with high (91 percent) 1,2 addition polybutadiene. Reduction of the 1,2 content to 71 percent induced an upper critical solution temperature (UCST) with the cis 1,4 polymer. Polybutadienes with 50 percent and 10 percent 1,2 contents were miscible above the crystalline melting temperature of the cis 1,4 polybutadiene. Immiscibility of the 91 percent 1,2 addition polymer was also found with a 10 percent 1,2 polybutadiene. The latter polymer also exhibits an UCST with the 71 percent 1,2 polymer. The results are used to interpret the characteristics of blends of polybutadienes of varying microstructure. 相似文献
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以F类粉煤灰为例,详细介绍了测定粉煤灰中烧失量的步骤、计算数学模型、影响测量不确定度的因素以及各项测量不确定度分量评定,人员、设备、材料、方法、环境都是影响测量不确定的因素。 相似文献
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The objective of the study was to explore the effect of the degree of deacetylation (DD) of the chitosan used on the degradation rate and rate constant during ultrasonic degradation. Chitin was extracted from red shrimp process waste. Four different DD chitosans were prepared from chitin by alkali deacetylation. Those chitosans were degraded by ultrasonic radiation to different molecular weights. Changes of the molecular weight were determined by light scattering, and data of molecular weight changes were used to calculate the degradation rate and rate constant. The results were as follows: The molecular weight of chitosans decreased with an increasing ultrasonication time. The curves of the molecular weight versus the ultrasonication time were broken at 1‐h treatment. The degradation rate and rate constant of sonolysis decreased with an increasing ultrasonication time. This may be because the chances of being attacked by the cavitation energy increased with an increasing molecular weight species and may be because smaller molecular weight species have shorter relaxation times and, thus, can alleviate the sonication stress easier. However, the degradation rate and rate constant of sonolysis increased with an increasing DD of the chitosan used. This may be because the flexibilitier molecules of higher DD chitosans are more susceptible to the shear force of elongation flow generated by the cavitation field or due to the bond energy difference of acetamido and β‐1,4‐glucoside linkage or hydrogen bonds. Breakage of the β‐1,4‐glucoside linkage will result in lower molecular weight and an increasing reaction rate and rate constant. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 90: 3526–3531, 2003 相似文献