改性硫酸钙晶须/聚丙烯复合材料力学性能研究

用硬脂酸作为表面改性剂,通过双料口加料方法制得硫酸钙晶须/聚丙烯复合材料,研究了硫酸钙晶须添加量对复合材料力学性能的影响。试验结果表明:当硫酸钙晶须添加量为8%时,拉伸强度达到最大值,较纯pp拉伸强度提高了3.49%;当硫酸钙晶须添加量为12%时,弹性模量达到最大值,为1.451 GPa,较纯pp提高了16.5%;当硫酸钙晶须添加量为12%时,断裂伸长率为27.46%,比纯pp下降了41.74%;硫酸钙晶须添加到2%时,缺口冲击强度有较大提高,比纯pp提高了36.2%。

Study on Mechanics Performance of Calcium Sulphate Whisker Modified/Polypropylene Composite Material

With stearic acid as surface modification agent , calcium sulfate whisker/polypropylene composite material was prepared through double feeding method .The effect of calcium sulfate whisker content on mechanical properties of composite materials was studied .The experimental re-sults showed that when calcium sulphate whisker content was 8%, tensile strength reached the maximum value , increased by 3 .49% than pure polypropylene; when calcium sulphate whisker content was 12%, the elastic modulus was maximum , 1.451 GPa, increased by 16.5%than pure polypropylene; when calcium sulphate whisker content was 12%, elongation at break was 27 .46%, lower than pure polypropylene , 41 .74%; when calcium sulphate whisker was added to 2%, the notched impact strength increased greatly , increased by 36 .2%than the pure polypropyl-ene .