不同品种碳酸钙填充PVC性能的研究  

Performances of PVC filled with different kinds of calcium carbonate

作　　者：骆振福[1] 任晓玲[1] 乔军[1] 朱再胜[1] 李海滨[1] 代宁宁[1] 

机构地区：[1]中国矿业大学化工学院,江苏徐州221116

出　　处：《中国矿业大学学报》2012年第1期69-73,共5页Journal of China University of Mining & Technology

基　　金：国家自然科学基金项目(50974079);国家自然科学基金创新研究群体科学基金项目(50921002);中央高校基本科研业务费专项资金项目(2010ZDP01A06)

摘　　要：为了考察不同品种碳酸钙对PVC/CaCO3复合材料性能的影响,采用双螺杆挤出机挤出造粒、注塑机注塑成型,通过万能试验机和简支梁冲击试验机检测其力学性能,使用SEM观察断面微观形貌.结果表明:纳米钙和包覆钙的填充效果最好,分别使PVC的拉伸强度增加19%和17%,PVC的无缺口冲击强度增加4倍以上,分别达54.05和51.67kJ/m2;PVC的缺口冲击强度增加3倍左右,分别达28.94和22.59kJ/m2;复合钙的填充效果居中,重钙和轻钙最差.多种CaCO3填充PVC后,PVC原来平整的颗粒轮廓发生了变化,纳米钙和包覆钙形成了大量高低不平而圆润的表面,重钙和轻钙形成较多的裂纹和空穴.In order to investigate the effects of different kinds of calcium carbonate on performance of PVC/CaCO3 composite, a twin-screw extruder was used for extrusion and granulation, while an injection molding machine was used for model injection. The mechanical properties were tested by a universal testing machine and a simply supported beam impact testing machine. The microscopic morphology of fractured surface was observed by a SEM. The results show that the filling effects of nano-CaCO3 and coated CaCO3 are the best. The tensile strengths of PVC were increased by 19% and 17%, respectively. The non-notched impact strengths of PVC were increased by four times, which are 54. 05 kJ/m^2 and 51.67 kJ/m^2 , respectively. The notched impact strengths of PVC were increased by about three times, which are 28.94 kJ/m^2 and 22.59 kJ/m^2 , respectively. The filling effect of composite calcium is mediocre, and those of GCC and PCC are the worst. After being filled with many varieties of calcium carbonate, the flat outline of original PVC changed, nano-CaCO3 and coated CaCO3 formed many uneven and rounded surfaces, and GCC and PCC form more flaws and holes.

关 键 词：碳酸钙 PVC 填充 性能 形貌 

分 类 号：TQ327[化学工程—合成树脂塑料工业]