期刊论文

Study on dynamic rheological properties of modified wood plastic composites by nano CaCO_3

中文

中南林业科技大学学报

1673-923X

2018

38

7

117-122

10.14067/j.cnki.1673-923x.2018.07.019

国家自然科学基金项目（31670563） 国家林业公益性行业科研专项（201504503）

本校为第一机构

通过超声波分散改性技术对硅烷偶联剂KH570改性的纳米碳酸钙进行表面改性制备了改性纳米碳酸钙,采用熔融共混法制备了木纤维(WF)/聚丙烯(PP)/纳米碳酸钙三元复合材料。使用ARES旋转流变仪系统研究了复合材料的动态流变性能。结果表明:扫描频率、温度及纳米CaCO_3含量均会对体系的流变性能产生影响。随着扫描频率的增大,体系的储能模量G'与损耗模量G″越大,而复数粘度η*则减小,温度升高时复数粘度和松弛时间降低。当纳米CaCO_3加入量≤ 15%(质量分数)时,随着纳米CaCO_3含量的增加,WF/PP/纳米CaCO_3复合材料的储能模量、损耗模量和复数黏度逐渐增加且均高于WF/PP,当纳米CaCO_3加入量> 15%(质量分...

The modified nano-CaCO_3 was prepared from the surface modification of the silane coupling agent KH570-modified nano- CaCO_3 by the technique of ultrasonic dispersion modification, Wood fiber (WF)/polypropylene(PP)/nano calcium carbonate ternary composite was prepared by melt blending.The rheological properties of the composites were investigated by using the system of ARES advanced expansion rheometer. The results showed that the scanning frequency, temperature and nano-CaCO_3 contentl all had the influence on the rheological properties of it....