Photo-oxidation behaviour of polypropylene/multi-wall carbon nanotube composites
Multi-wall carbon nanotubes (MW-CNTs) were melt blended with polypropylene (PP) in order to assess their effects on the photo-oxidation behaviour of the resultant PP/MW-CNTs composites. The mechanical properties of PP/MW-CNTs composites with various MW-CNTs contents were tested before and after photo-oxidation. Results showed that before photo-oxidation, the tensile strengths of the samples increased with the increase of MW-CNTs contents when the MW-CNTs contents were less than 1 wt %, whilst the tensile strength decreased at higher MW-CNTs contents (>1% wt). When subjected to photo-oxidation, the tensile strengths of the samples decreased with the increasing photo-oxidation time. The resistance to accelerated photo-oxidation of PP/MW-CNTs composites was also compared with the photo-oxidation behaviour of the original polypropylene sample. At short photo-oxidation time, such as under 250 h, the rates of carbonyl formation for the PP/MW-CNTs composites are similar to that for the original polypropylene but at longer photo-oxidation times the carbonyl formation increases for lower MW-CNTs contents (0.1, 0.2, 0.5 and 0.8% wt), and decreases for higher MW-CNTs contents (1% and 2% wt). It was found that the MW-CNTs showed both anti-degradation and pro-degradation effects at different concentrations.
WANG Hongmei LIAN Yuan YUAN Lixia CHENG Qiong
Institute of Biological and Chemical Engineering, Jiaxing University, Jiaxing 314001, P.R.China
国际会议
2009 International Conference on Advanced Fibers and Polymer Materials(2009年先进纤维与聚合物材料国际学术会议)
上海
英文
970-972
2009-10-21（万方平台首次上网日期，不代表论文的发表时间）