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首页> 外文期刊>Journal of Applied Polymer Science >A thorough study on the relationships between dispersion quality and viscoelastic properties in carbon black filled SBR compounds
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A thorough study on the relationships between dispersion quality and viscoelastic properties in carbon black filled SBR compounds

机译：炭黑填充丁苯橡胶中分散质量与粘弹性之间关系的透彻研究

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A series of carbon black filled SBR 1500 compounds (without curatives) were prepared in carefully controlled lab-mixing conditions so that filler content ranged from 0 to 50 phr, with the usual compounding ingredients. Carbon Black agglomeration and dispersion quality were assessed through an advanced microscopic technique with automated data treatment. Linear and nonlinear viscoelastic properties were evaluated using a closed cavity torsional rheometer, equipped for Fourier Transform rheometry experiments. In the linear viscoelastic regime, dynamic moduli mastercurves were derived from experiments in the 60-160°C temperature range. In the nonlinear viscoelastic regime, complex modulus and torque harmonics variation with strain amplitude were investigated at 100°C and frequency 0.5 and 1.0 Hz. Relationships between dispersion quality, carbon black loading and mixing parameters were investigated so that dispersion appears better when the filler loading is above a critical level that to some extent (but not exactly) corresponds to the theoretical percolation threshold (around 13%). Linear and nonlinear viscoelastic measurements demonstrate and quantify the role played by plasticizing compounding ingredients, that is, processing oil, stearic acid and other chemicals, with nearly no significant effect of mixing energy. At least 10-15 phr carbon black are necessary to recover the modulus loss associated with this plasticizing effect. Nonlinear results and particularly the torque harmonics reveal a number of details as to how the compounding ingredients do affect the viscoelastic behavior, with expectedly the carbon black playing the major role. By fitting results with mathematically simple models, all of the observed effects can be summarized in a rather limited number of parameters so that the effects of compounding ingredients can be studied in details.
机译：在精心控制的实验室混合条件下，制备了一系列炭黑填充的SBR 1500化合物（不含固化剂），以使填料含量为0至50 phr，且含有常规的混合成分。炭黑的团聚和分散质量通过先进的显微技术和自动数据处理进行评估。使用配备了傅里叶变换流变仪实验的闭腔扭转流变仪评估线性和非线性粘弹性。在线性粘弹性体系中，动态模量主曲线来自60-160°C温度范围内的实验。在非线性粘弹性状态下，研究了在100°C和0.5和1.0 Hz频率下，复模量和转矩谐波随应变幅度的变化。研究了分散体质量，炭黑负载量和混合参数之间的关系，以便当填充剂负载量在一定程度上（但不完全）与理论渗滤阈值（约13％）相对应的临界水平之上时，分散体表现得更好。线性和非线性粘弹性测量表明并量化了增塑复合成分（即加工油，硬脂酸和其他化学品）所起的作用，而混合能几乎没有显着影响。为了恢复与此增塑作用相关的模量损失，至少需要10-15 phr的炭黑。非线性结果，尤其是转矩谐波，揭示了许多有关配混成分如何影响粘弹性行为的细节，预计炭黑将起主要作用。通过将结果与数学上简单的模型进行拟合，可以在数量有限的参数中总结所有观察到的效果，从而可以详细研究复合成分的效果。

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