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应用正交设计法选取阿仑膦酸钠(ALN)加入超高分子量聚乙烯(UHMWPE)后均匀分散的最佳工艺参数,运用社会科学统计软件包(SPSS)对正交实验结果进行极差与方差分析,在最佳工艺参数下制备ALN/UHMWPE,通过拉伸力学性能实验、XRD、DSC、SEM及EDS表征样品性能。由正交实验得出ALN加入后均匀分散最佳工艺条件:表面活性剂F68,分散方式为超声分散,ALN质量分数1%,分散温度37℃;方差分析表明,实验具有统计学意义;拉伸力学实验结果表明,表面活性剂F68的加入可以有效提高(ALN-F68)/UHMWPE拉伸强度与断裂伸长率;加入表面活性剂样品的结晶度较未加表面活性剂对照样有所提高,但均低于空白UHMWPE,ALN没有改变UHMWPE晶型及其热熔性质;加入表面活性剂有助于ALN在UHMWPE中的均匀分散。
Orthogonal design method was used to select the optimal process parameters for the uniform dispersion of alendronate (ALN) into ultra-high molecular weight polyethylene (UHMWPE). Using SPSS software, ANOVA and UHMWPE were prepared under the best processing parameters by means of ANOVA. The properties of samples were characterized by tensile mechanical properties, XRD, DSC, SEM and EDS. The orthogonal experiment showed that the optimum conditions for the uniform dispersion of ALN were as follows: Surfactant F68, dispersion method: ultrasonic dispersion, ALN mass fraction 1%, dispersion temperature 37 ℃; ANOVA showed that the experiment had statistical significance; The results of mechanical tests show that the addition of surfactant F68 can effectively increase the tensile strength and elongation at break of (ALN-F68) / UHMWPE. The addition of surfactant increases the crystallinity of the sample compared with the control without surfactant, But lower than that of blank UHMWPE. ALN did not change the crystalline form of UHMWPE and its hot melt properties. The addition of surfactant contributed to the uniform dispersion of ALN in UHMWPE.