【高分子材料与工程】【毕业设计 开题报告 文献综述】聚丙烯聚丙烯碳纳米管复合材料的光稳定性研究（可编辑）.doc

(20 届) 本科毕业设计 聚丙烯/聚丙烯碳纳米管复合材料的光稳定性研究 摘要:碳纳米管具有优良的轻度、韧性、电导率、热导率、化学稳定性和热稳定性等性能,本文采用聚丙烯为基体材料,利用碳纳米管对其改性。通过在聚丙烯基体中加入了未经修饰的碳纳米管CNTs制备聚丙烯/碳纳米管PP/CNTs复合材料,并研究碳纳米管对复合材料的微观结构、结晶行为、热性能、力学性能和光稳定性的影响。对比研究了纯PP和PP/CNT复合材料的光降解行为。根据CNT的含量不同,CNT既有促进降解的作用,又有抗降解的作用。 关键词:聚丙烯;碳纳米管;力学性能;光稳定性 Abstract:Multi-wall carbon nanotubes MW-CNTs were melt compounded with polypropylene PP in order to assess their effect on the photo-oxidation behaviour of the resultant PP/MW-CNTs composites. The mechanical properties of PP/MW-CNTs composites with various MW-CNTs 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 observed 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. Keywords: Polypropylene; Carbon nanotube; Mechanical properties; Photo-oxidation 目录 摘要 VI Abstract..V1 绪 论 1 1.1 聚丙烯材料 1 1.1.1 聚丙烯生产工艺介绍 1 1.1.2 聚丙烯的改性 1 1.2 碳纳米管的结构、性能及制备 2 1.2.1 碳纳米管结构和性能 2 1.2.2 碳纳米管的制备 2 1.3 聚丙烯/碳纳米管复合材料 3 1.4 碳纳米管/聚合物复合材料的性能 4 1.4.1 力学性能 4 1.4.2 光学性能 5 1.4.3 电性能 5 1.4.4 助燃性与耐热性 5 1.5 碳纳米管在聚丙烯复合材料的发展现状 5 2 实验部分 7 2.1 实验原料 7