摘要
研究了纳米CaCO3的用量对PVC复合材料结构形态与性能的影响关系。结果表明,在PVC共混体系中加入纳米CaCO3可明显地提高材料的韧性,而不降低材料的强度。当共混体系中纳米CaCO3的用量为8份(质量)时,复合材料的缺口冲击强度达到81.1kJ/m2,是不加纳米CaCO3的7.3倍。用透射电子显微镜及扫描电子显微镜观察了纳米CaCO3/PVC复合材料的微观结构及断面形态,发现纳米Ca-CO3在PVC基体中达到了纳米级的分散,复合材料的冲击断裂面产生了大量的网丝状结构。纳米Ca-CO3的加入使共混体系的加工流动性能变差,加工流动改性剂M的加入可以改善纳米CaCO3/PVC共混体系的流变性能。
The effect of Nano-CaCO_3 content on the structure and the mechanical properties of Nano-CaCO_3/PVC composites was investigated. The results show that the toughness of PVC composites is increased dramatically by the addition of Nano-CaCO_3 particles. The single-notched impact strength of the PVC nanocomposite reached 81.1 kJ/m^2 when the mass ratio of Nano-CaCO_3/PVC was 8/100, which was as (7.3) times as the impact strength of the composites without Nano-CaCO_3 particles. And the microstructure of dispersed calcium carbonate nanoparticles in the nanocomposites matrix was observed by TEM. It is found that CaCO_3 nanoparticles are well-dispersed in PVC matrix at nano-scale. The morphology of the fracture surface of composites was also observed by SEM. Silk network structure was found only existed in the composites with Nano-CaCO_3. Such microstructure of the composites confirmed the mechanism that the toughness of PVC was remarkable increased by the incorporation of Nano-CaCO_3 particles. The rheological property of Nano-CaCO_3/PVC composites was also investigated.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2003年第6期146-148,共3页
Polymer Materials Science & Engineering
基金
国家科技攻关计划
北京市新星计划资助项目
