纳米碳酸钙/弹性体/聚苯乙烯体系的力学性能及形态  

MORPHOLOGY AND MECHANICAL PROPERTIES OF NANO-CaCO_3/SBS/PS BLENDS

作　　者：袁绍彦[1] 吕军[1] 罗勇[1] 黄锐[1] 

机构地区：[1]四川大学高分子科学与工程学院

出　　处：《复合材料学报》2005年第3期25-29,共5页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金重点项目(29934070;29434010)

摘　　要：研究了纳米碳酸钙/SBS或mSBS/聚苯乙烯共混物体系的力学性能和形态。由于mSBS和纳米碳酸钙较强的相互作用,在PS复合材料体系中,更多的纳米碳酸钙进入弹性体相,原位形成了以纳米碳酸钙为核、弹性体为壳层的结构。这种结构增加了弹性体的体积分数,放大了弹性体的作用,减少了分散到脆性PS基体中的纳米碳酸钙粒子(尤其是纳米碳酸钙团聚体)数量,从而避免了对复合材料体系的不利影响;另一方面,可通过提高无机粒子的填充率降低材料成本。The mechanical properties and morphology of nano-CaCO3/SBS or mSBS/PS composites were studied. In a nano-CaCO3/mSBS/PS system, nano-CaCO3 particles are mostly encapsulated in mSBS. The core-shell structure increases the volume fraction of elastomer (mSBS) and enlarges the effect of mSBS on the mechanical properties of this system. On the other hand, the concentration of nano-CaCO3 particles decreases in PS matrix, which prevents nano-CaCO3 (especially agglomerated nano-CaCO3 particles) from impairing the mechanical properties of the system. Compared with SBS system, the costs of the composites decrease with the increase of optimum loading of nano-CaCO3.

关 键 词：纳米碳酸钙 聚苯乙烯 SBS 包裹 增韧 

分 类 号：TB332[一般工业技术—材料科学与工程]