填料表面处理对ABS/CaCO_3复合材料性能的影响

Influence of filler's surface treatment on mechanical and thermal properties of ABS/CaCO_3 composites

在室温下,测定了CaCO3填充丙烯腈-丁二烯-苯乙烯三元共聚物(ABS)复合材料的力学性能。结果表明,随着CaCO3质量分数[w(CaCO3)]的增加,试样的拉伸弹性模量呈非线性提高,而拉伸强度和拉伸断裂能下降。当w(CaCO3)小于10％时,试样的简支梁缺口冲击强度随着w(CaCO3)的增加而迅速减小,而弯曲强度却增大,w(CaCO3)达10％后两者均缓慢地减小。CaCO3的表面处理及其粒径大小对上述力学性能的影响不太明显。此外,测量了试样的维卡软化温度(Tvc),Tvc随着w(CaCO3)的增加而提高,这表明填充CaCO3粒子有利于改善ABS的耐热性能。

The mechanical properties of acrylonitrile -butadiene -styrene copolymer (ABS) filled with calcium carbonate (CaCO3) were measured at ambient temperature. The results show that with increasing the mass fraction [ω(CaCO3)] of the filler, the tensile modulus of the composite increases non-linearly while the tensile strength and tensile fracture energy decreases gradually. When ω(CaCO3) is less than 10%, the simple beam notched impact strength decreases rapidly and at the same time, the bending strength increases as ω(CaCO3) goes up, after ω(CaCO3) reaches 10% , both properties slowly decrease. However, the effects of particle size and surface treatment of CaCO3 on the aforementioned mechanical properties are insignificant. Furthermore, in accordance with measurement of Vicat softening temperature (VST) of the composite, it is found out that VST rises as ω(CaCO3) increases. This phenomenon indicates that filling CaCO3 benefits improving the heat resistance of ABS resin.