Toughening of glass fiber reinforced Nylon 66 with EPDMMAH: Dynamic mechanical, rheological, and morphological investigations
Toughening of glass fiber reinforced Nylon 66 with EPDMMAH: Dynamic mechanical, rheological, and morphological investigations
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使用 EPDMMAH 增韧玻璃纤维增强尼龙 66：动态机械、流变和形态研究
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
A. Yousefi
中科院分区：
文献类型：
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作者：
I. Soltani;M. Zeynali;A. Yousefi
本文研究了不同工艺参数和三元乙丙橡胶用量对复合材料力学性能和流变性能的影响。通过傅立叶变换红外光谱(FTIR)分析，得到了使顺丁烯二酸酐接枝率最高的过氧化二异丙苯(DCP)用量。一般来说，尼龙66与三元乙丙橡胶不相容，且界面张力较高，使其难以共混。在三元乙丙橡胶上接枝马来酸酐，以降低两相间的界面张力。此外，在尽可能高的混合速度(挤出时的螺杆速度)和最低的温度下制备了共混物，以获得均匀的样品，这在扫描电子显微镜(SEM)图像和冲击强度结果中都可以看出。用动态机械热分析(DMTA)测试了各组分的相容性，并测定了共混物的玻璃化转变温度。流变学测试表明，随着三元乙丙橡胶用量、共混时间和剪切速率的增加，共混物各组分的粘度变得更加接近。
Abstract In this research the variation of mechanical and rheological properties of the composite as a function of different processing parameters and ethylene propylene diene monomer (EPDM) rubber content was studied. The optimum amount of dicumyl peroxide (DCP) to achieve the highest percentage of grafting of maleic anhydride to EPDM was obtained by Fourier transform infrared (FTIR) spectroscopy. In general, immiscibility between nylon 66 and EPDM, and their high interfacial tension makes their blending difficult. Maleic anhydride was grafted to EPDM to reduce interfacial tension between two phases. Also the blends were prepared at highest possible speed of mixing (screw speed in extrusion) and lowest temperature to reach a well mixed sample which can be seen in scanning electron microscopy (SEM) images and impact strength results. Dynamic mechanical thermal analysis (DMTA) tests were conducted to evaluate the miscibility of the components and to measure the glass transition temperature of the blends. Rheological measurement showed that the viscosities of the components of the blend getting closer to each other when EPDM content, time of mixing and shear rate increase.