纳米碳酸钙/ 弹性体/ 聚苯乙烯体系的力学性能及形态

基金项目: 国家自然科学基金重点项目(29934070,29434010)

详细信息

MORPHOLOGY AND MECHANICAL PROPERTIES OF NANO-CaCO₃ / SBS/ PS BLENDS

1.
College of Polymer Science and Engineering, Sichuan University, Chengdu 610065, China;
2.
EngineeringCenter of Nano Science and Technology, Shanghai Jiao Tong University, Shanghai 200030, China

摘要

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。
- 纳米碳酸钙 /
- 聚苯乙烯 /
- SBS /
- 包裹 /
- 增韧
Abstract: 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 encap sulated in mSBS. The core-shell st ructure increases the volume f raction of elastomer (mSBS) and enlarges the effect of mSBS on the mechanical propertiesof this system. On the other hand, the concent ration of nano-CaCO₃ particles decreases in PS mat rix, which prevent s nano-CaCO₃ (especially agglomerated nano-CaCO₃ particles) f rom impairing the mechanical properties of thesystem. Compared with SBS system, the costs of the composites decrease with the increase of optimum loading ofnano-CaCO₃ .
- nano-CaCO₃ /
- PS /
- SBS /
- encap sulation /
- toughening