摘要
用扫描电镜观察了碳酸钙(CaCO3)/高密度聚乙烯(HDPE)复合材料的冲击断口形貌.发现以1250目轻质CaCO3填充的HDPE,其断口形貌一般呈带状结构;以1250目重质CaCO3或325目轻质CaCO3填充的HDPE,其断口形貌一般呈絮状结构.带状的成因是包覆的CaCO3粒子具有几乎各向同性地向四周传递应力的能力,满意地解释了带状的平行方向可以与宏观受力方向平行、垂直或成某种夹角,但总是与微观的某一基体屈服、变形的方向垂直.带状与絮状结构是断口形貌的两种形式。
The effect of the content of 'W-893' coupling agent and that of particle size, type and content of CaCOe on the impact strengh of HDPE compound were discussed. HDPE compouned filled with 50 PHR CaCOe has the impact strength of 542.35 J /m, which is 3.7 times that of HDPE matrix. An investigation of impact fracture morphology of HDPE compound has ben undertaken by SEM(scanning electron microscope) which showed that impact fracture surface of L-1250 CaCO3 that of both L-325 CaCO3 and W- 1250 CaCO3 filled HDPE compound exhibit flocculence structure. In banded structure, the direction of alligament band is always vertical to that of deformation and yield of HDPE whether it is parallel to the loaded force or not.
出处
《高分子学报》
SCIE
CAS
CSCD
北大核心
1996年第3期310-317,共8页
Acta Polymerica Sinica
基金
国家自然科学基金
关键词
断口形貌
碳酸钙
聚乙烯
聚合材料
Banded structure, Flocculence, Impact fracture morphology, CaCO_3 /HDPE