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通过熔融共混法制备了不同CaCl2质量分数的CaCl2/环氧树脂(E51)/尼龙6(PA6)复合材料,利用DSC、流变仪、FTIR和电子拉伸机等研究了不同CaCl2质量分数下CaCl2/E51/PA6复合材料结晶行为及其力学性能,并研究了其受限机制。力学性能结果表明,随着CaCl2质量分数的增加,CaCl2/E51/PA6复合材料拉伸强度呈现出先增大后减小的趋势,当CaCl2质量分数为3%时,复合材料拉伸强度达到最大值82.67 MPa,是纯PA6的拉伸强度(60.5 MPa)的1.366倍,而结晶行为结果表明,增加CaCl2的质量分数,CaCl2/E51/PA6复合材料的成核温度、晶体生长温度、熔融温度及玻璃化转变温度均向低温方向移动,成核密度和成核速率也逐渐减小,结晶能力下降,结晶度由原来25.22%变为9.90%。
CaCl2 / epoxy resin (E51) / nylon 6 (PA6) composites with different CaCl2 content were prepared by melt blending method. The effects of different CaCl2 concentration on the composites were investigated by DSC, rheometer, FTIR and electronic stretching machine The crystallization behavior and mechanical properties of CaCl2 / E51 / PA6 composites were studied and their mechanism of restraint was studied. The results of mechanical properties show that the tensile strength of CaCl2 / E51 / PA6 composite firstly increases and then decreases with the increase of CaCl2 mass fraction. When the CaCl2 mass fraction is 3%, the tensile strength of the composites reaches the maximum 82.67 MPa, which is 1.366 times higher than that of pure PA6 (60.5 MPa). The results of crystallization show that increasing the mass fraction of CaCl2, the nucleation temperature, the crystal growth temperature, the melting temperature and the glass temperature of the CaCl2 / E51 / PA6 composites The transformation temperature is all moved to the low temperature. The nucleation density and nucleation rate also decrease gradually, and the crystallization ability decreases. The crystallinity changes from 25.22% to 9.90%.