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采用湿法连续混炼工艺制备炭黑/天然橡胶(NR)复合材料,并与传统干法混炼工艺相比,研究复合材料的性能和炭黑在复合材料中的分散性。结果表明:湿法工艺与连续混炼工艺结合,可实现复合材料的绿色环保混炼;与干法混炼工艺混炼胶相比,湿法连续混炼工艺混炼胶的门尼粘度增大,t90缩短;与传统干法混炼工艺硫化胶相比,湿法连续混炼工艺硫化胶的拉伸强度、耐磨性能和抗切割性能提高,Payne效应和60 ℃时的损耗因子减小,即其综合物理性能优异;湿法连续混炼工艺硫化胶的炭黑分散较为均匀,未出现大团聚体,炭黑分散等级X为7.9,平均团聚尺寸为3.4 μm。 相似文献
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采用湿法混炼工艺制备氧化石墨烯(GO)/天然橡胶(NR)复合材料,并对其性能进行研究。结果表明:加入GO的胶料门尼粘度增大,t_(10)和t_(90)延长,硫化胶的物理性能、导电性能和导热性能提高,储能模量增大,损耗因子减小;随着GO用量的增大,胶料的t_(10)和t_(90)先延长后缩短,硫化胶的定伸应力增大,拉伸强度和撕裂强度先增大后减小,导电性能变化不大,导热性能总体提高;当GO用量为2份时,复合材料的综合性能最佳,GO在复合材料中的分散性最好。 相似文献
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将干冰用于氧化石墨烯(GO)/白炭黑/天然胶乳(NRL)的混合乳液中,利用干冰气化产生的大量气泡破裂而形成的能量对填料聚集体的破碎作用,提高填料在NRL中的分散性,研究干冰用量对GO/白炭黑/天然橡胶(NR)复合材料性能的影响。结果表明:干冰用量较小时,随着干冰用量的增大,复合材料的Payne效应减弱,交联密度增大,物理性能提高,滚动阻力降低;干冰用量较大时,复合材料的Payne效应增强,交联密度减小,物理性能下降,滚动阻力提高;干冰用量为20份时,复合材料的物理性能最佳。 相似文献
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研究混炼工艺对不同并用比的杜仲胶/天然橡胶(EUG/NR)并用胶性能的影响。结果表明:当EUG用量不大于30份时,EUG/NR并用胶无明显的结晶,EUG硫化胶的结晶为β晶型;与干法混炼工艺下EUG/NR并用胶相比,湿法混炼工艺下EUG/NR并用胶的Payne效应弱,炭黑分散性更好;随着EUG用量的增大,EUG/NR并用胶的拉伸强度减小;湿法混炼工艺下EUG/NR并用胶的伸张疲劳寿命延长,当EUG用量为20份时干法和湿法混炼工艺下EUG/NR并用胶的伸张疲劳次数均最大,分别为2.6万和3.7万。 相似文献
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在SBR胶乳/NR胶乳共混的基础上,采用凝聚共沉法制备高耐磨炭黑(HAF)填充型粉末丁苯橡胶/天然橡胶并用胶[P(SBR/NR/HAF)]。研究了SBR/NR并用比、制备工艺等对P(SBR/NR/HAF)并用胶的混沌流变性能和物理机械性能的影响,并与块状SBR/NR/HAF并用胶进行了比较。研究表明,与SBR/NR/HAF相比,P(SBR/NR/HAF)的表观剪切粘度在SBR用量小于50份时对混炼时间的依赖性较低,而在SBR用量大于50份后对混炼时间具有更高的依赖性;P(SBR/NR/HAF)硫化胶 拉伸强度在整个并用范围内对SBR/NR并和比不敏感;采用胶乳预混合的工艺制备的P(SBR/NR/HAF)具有较好的物理机械性能。 相似文献
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研究炭黑在天然橡胶(NR)/顺丁橡胶(BR)并用胶中分布对并用胶性能的影响。结果表明:BR中炭黑的质量分数增大,NR/BR并用胶硫化胶的定伸应力、拉伸强度和拉断伸长率增大,耐磨性能提高,压缩生热和动态损耗因子减小,抗裂口增长性能变差;NR中炭黑的质量分数增大,NR/BR并用胶硫化胶的耐屈挠性能增强。 相似文献
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Preparation and Properties of Natural Rubber/Palygorskite Composites by Co-Coagulating Rubber Latex and Clay Aqueous Suspension 总被引:4,自引:0,他引:4
Shangyue Shen Mei Yang Songlin Ran Fang Xu Zongxia Wang 《Journal of Polymer Research》2006,13(6):469-473
Natural rubber (NR)/Palygorskite composites were prepared by co-coagulating rubber latex and clay aqueous suspension. Org-palygorskite was attained by using cetyltrimethylammonium bromide (CTAB) and the four factors influencing the average diameter of palygorskite were discussed. Four optimal conditions of preparing minimum average diameter were determined which included the concentration of palygorskite, the concentration of sodium polyacrylate, ultrasonic time and ultrasonic power. Mechanical properties suggested that composites using modified palygorskite which were dispersed by ultrasonic wave were the best, the tensile strength, tear strength, 300% modulus and shall hardness increased by 77.14%, 118.18%, 242.86% and 65.2%, respectively. Modified palygorskite was shown by FTIR spectrogram and observed by ESEM. Modified palygorskite dispersed by ultrasonic wave were dispersed into the rubble uniformly, some stick particles inserted into the rubber and it is difficult to find stick shape, and there were 20% particles belonging to nanomaterials and 80% micromaterials. 相似文献