Insight into interfacial compatibilization of glass-fiber-reinforced polypropylene (PP) using maleic-anhydride modified PP employing infrared spectroscopic imaging
Insight into interfacial compatibilization of glass-fiber-reinforced polypropylene (PP) using maleic-anhydride modified PP employing infrared spectroscopic imaging
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DOI：
10.1016/j.compscitech.2020.108379
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发表时间：
2020-10
影响因子：
9.1
通讯作者：
Ryota Watanabe;Aki Sugahara;Hideaki Hagihara;Junji Mizukado;H. Shinzawa
中科院分区：
文献类型：
--
作者：
Ryota Watanabe;Aki Sugahara;Hideaki Hagihara;Junji Mizukado;H. Shinzawa
本文提出了一种利用傅里叶变换红外显微镜（FTIR）探测化学结构的方法来评价将马来酸酐接枝聚丙烯（MAPP）引入玻璃纤维增强聚丙烯中的增容效果。利用羰基产生的积分光谱强度构建FTIR成像，研究了MAPP在复合材料中的分散状态。MAPP主要分布在玻璃纤维周围，这是由于MAPP中的羰基与纤维表面的硅醇基相互作用形成的。界面相互作用对纤维复合材料基体-纤维粘附的影响在拉伸试验后通过FTIR成像观察断裂表面得到证实。检测到纤维上粘附有聚合物。这表明，由于界面粘附性的提高，在基体部分发生了内聚失败。因此，MAPP的加入对于改善基体与填料的粘附性至关重要，这有助于通过有效的应力传递和防止基体与纤维界面的破裂来提高强度和延展性。这种表征技术可以作为一种普遍适用的工具来揭示聚合物复合材料的增容机理。
We propose a technique for evaluating the compatibilization effect of maleic anhydride-grafted polypropylene (MAPP) introduced into glass fiber reinforced polypropylene by probing chemical structures using Fourier transform infrared (FTIR) microscopy. The dispersion state of MAPP in the composites was investigated by FTIR imaging constructed with integrated spectral intensity arising from carbonyl groups. MAPP was predominantly distributed around the glass fibers, due to the formation of interactions between the carbonyl groups in MAPP and the surface silanol groups on the fibers. The effects of interfacial interactions on matrix-fiber adhesion of the fiber composite were confirmed by observation of a fracture surface, using FTIR imaging, after tensile testing. The presence of polymer adhered to the fiber was detected. This revealed cohesive failure to occur in the matrix portion, attributable to improved interfacial adhesion. The addition of MAPP is therefore essential to improve matrix-filler adhesion, which contributes to enhanced strength and ductility by efficient stress transfer and prevention of fracturing at the matrix-fiber interface. This characterization technique can be utilized as a generally applicable tool to reveal the mechanisms of compatibilization of polymer composites.