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Effect of interaction enhancement on rheological response of polypropylene /polybutadiene blend composites
Polymer Testing ( IF 5.1 ) Pub Date : 2021-01-13 , DOI: 10.1016/j.polymertesting.2021.107069
Yuguang Liu , Bo Tian , Xinyang Liu

Enhancement interaction between polybutadiene (PB) nanoparticle and polypropylene (PP) matrix by grafts via hydrogen bonding was verified and characterized by dynamic rheological analysis. The introduction of acrylamide (AM) facilitated PB uniform distribution in PP and strengthened interfacial interaction. The correlated structure based on H-bonding interaction leading to the viscoelastic nonlinearity, which restricted polymer relaxation and exhibited different rheological responses. The formation of correlated structure is an energetically favorable process driven by enthalpy, while the dynamics of construction is controlled by diffusion of the binding groups correspondingly, thus, the reconstruction and recoverability depend on the thermodynamic equilibrium distorted by either the shearing or the temperature. Therefore, the recovery ratio increases from 77.31%, 96.53%, to 98.87%, for the blend with identical composition, when increment of temperature from 180, 200–220 °C, is attributed to relaxation enhancement for both the decrement of local viscosity and the acceleration of diffusion.



中文翻译:

相互作用增强对聚丙烯/聚丁二烯共混物流变响应的影响

通过动态流变分析验证并表征了通过氢键接枝的聚丁二烯(PB)纳米粒子与聚丙烯(PP)基质之间的增强相互作用。丙烯酰胺(AM)的引入促进了PB在PP中的均匀分布并增强了界面相互作用。基于氢键相互作用的相关结构导致粘弹性非线性,这限制了聚合物的松弛并表现出不同的流变响应。相关结构的形成是由焓驱动的在能量上有利的过程,而结构的动力学相应地由结合基团的扩散控制,因此,重建和可恢复性取决于剪切或温度扭曲的热力学平衡。因此,

更新日期:2021-01-16
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