摘要
通过熔融共混和注塑成型制备出不同纳米稀土(NRE)含量的聚丙烯/氧化镧(PP/La2O3)纳米复合材料,并对该复合材料的力学性能进行了详细研究。结果表明:PP/La2O3纳米复合体系的力学性能受La2O3添加量的影响较大,随La2O3用量的增加,材料的屈服强度与屈服点伸长率均呈先增大后减小的趋势,且均在La2O3用量为1份时出现极大值;另外XRD分析结果显示该复合体系具有两种PP晶型。通过加入La2O3以及对体系进行退火可调节复合材料的内在结构,由此达到控制材料性能的目的。
Polypropylene/lanthanum oxide（PP/La2O3） nanocomposites with different nano rare earth（NRE） content were prepared by melt blending and injection moulding, and mechanical properties of the composites were studied in detail. The results show that the addition of NRE has a great influence on the mechanical properties of the blend system. With the increase of NRE content, the yield strength and yield-point elongation increase first and then decrease, and reach their maximum values simultaneously when NRE content is 1.0 phr. Moreover, there are two different PP crystal forms in the blend system as a result of X-ray diffraction（XRD）. Given all that, a hierarchy of ordered structure develops by adjusting the addition of NRE and annealing temperature, which in turn controls the properties of the PP/La2O3 nanocomposites.
出处
《塑料科技》
CAS
北大核心
2014年第7期79-83,共5页
Plastics Science and Technology
关键词
聚丙烯
纳米稀土
熔融共混
力学性能
Polypropylene
Nano rare earth
Melt blending
Mechanical properties
