超微细CaCO_3填充ABS复合材料的力学性能

MECHANICAL PROPERTIES OF ABS COMPOSITES FILLED WITH ULTRA-FINE CaCO_3

制备了超微细碳酸钙(CaCO3)填充丙烯腈-丁二烯-苯乙烯三元共聚物(ABS)复合材料,其中超微细CaCO3粒子的质量分数(ω)为0～40%.室温下测量了试样的拉伸和冲击性能.结果表明,当ω小于20%时拉伸弹性模量(Ec)随着ω的增加而增大,然后,呈线性下降;当粒子含量不高时,拉伸强度和拉伸断裂强度随着ω的增加呈线性减小,然后有所增加;断裂伸长率随着ω的增加明显下降;当ω小于20%时试样的冲击强度随着ω的增加明显下降,然后缓慢减小.应用扫描电镜观察了试样的冲击断面形貌.发现,超微细CaCO3粒子在基体中的分布尚算均匀,但其与基体之间的界面清晰.

A acrylnitrile-butadiene-styrene copolymer (ABS) composites filled with ultra-fine calcium carbonate (CaCO 3) is prepared, and the weigh fraction of the particles( ω ) was from 0 to 40%. The tensile and impact properties of the specimens were measured at room temperature. The results show that the tensile elastic modulus ( E c) increases with increasing ω when ω was less than 20%, and then it reduces linearly. The tensile strength and tensile fracture strength decreases linearly with increasing the content of CaCO 3 at lower particle content, and then increases gently. The impact strength decreases obviously with increasing ω when ω is less than 20%, and then it reduceds slightly. The impact fracture morphology of the specimens was observed by using a scanning electronic microscope. It is found that the distribution of the ultra-fine CaCO 3 particles in the matrix is basically uniform, but the interface is relatively clear.