Effect of rubber interparticle distance distribution on toughening behavior of thermoplastic polyolefin elastomer toughened polypropylene
Effect of rubber interparticle distance distribution on toughening behavior of thermoplastic polyolefin elastomer toughened polypropylene
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DOI：
10.1002/app.44068
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发表时间：
2016-10
影响因子：
3
通讯作者：
M. Fasihi;Hossein Mansouri
中科院分区：
文献类型：
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作者：
M. Fasihi;Hossein Mansouri
采用熔融共混法制备了聚丙烯（PP）与两种热塑性聚烯烃弹性体（TPO）的共混物。TPO是基于乙烯或丙烯的共聚物。采用拉伸、冲击和扫描电镜技术研究了共混物的力学性能和形态结构。TPO改性PP的冲击强度显著提高，这是由于TPO夹杂物在PP基体中分散均匀的结果。特别是，共混物含有PP基TPO表现出显着的增强韧性能量的拉伸试验中的塑性变形的特点。脆韧转变与理论模型存在一定的偏差，在理论模型中，颗粒间距离准则通常被实现为单一参数，仅控制脆韧坚韧行为。此外，在拉伸和冲击模式测试的脆-韧转变是不一致的共混物与广泛的分布的颗粒间的距离。© 2016 Wiley Periodicals，Inc. J.应用聚合物Sci. 2016，133，44068。
In this study, a blend of polypropylene (PP) and two types of thermoplastic polyolefin elastomers (TPO) were prepared by melt mixing. The TPOs were either ethylene- or propylene-based copolymer. The mechanical response and morphology of the blends were investigated using tensile and impact tests and scanning electron microscopy technique. There was significant increase in the impact strength of the TPO-modified PP, which was an outcome of fine dispersion of TPO inclusions. In particular, the blends containing PP-based TPO exhibited dramatic enhancement in toughness energy as featured by a plastic deformation in tensile test. The brittle-tough transition had several deviations from theoretical models, in which generally the interparticle distance criterion was realized as a single parameter, only controlled the transition of brittle to tough behavior. Moreover, the brittle-tough transition in tensile and impact mode tests was not coincident in the blend with a broad distribution of interparticle distance. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 44068.