摘要
采用共混的方法制备了聚丙烯/氧化镧(PP/La2O3)复合材料,研究了La2O3用量对复合材料结晶性能和流变性能的影响。结果表明:La2O3对PP具有明显的成核作用,提高了复合材料的相对结晶度;PP/La2O3复合体系的表观黏度随着剪切速率和温度的提高而逐渐降低;随着La2O3用量的增加,PP/La2O3复合体系的表观黏度先减小后增加,在La2O3用量为0.5份时达到最小值;复合材料的非牛顿指数随着温度的升高而增大,随着La2O3用量的增加先增大后减小;复合材料的黏流活化能随着剪切速率的增加而逐渐降低,随着La2O3用量的增加先减小后增大,但总体呈下降趋势。
PP/La2O3 composites were prepared by blending methods with polypropylene and lanthanum oxide. The effect of the La2O3 content on the crystal and rheological properties of PP/La2O3 was studied. The results show that La2O3 has a distinct nucleation effect on PP, and the relative crystallinity of the composite improves. The melt apparent viscosity of PET/La2O3 decreases with the increasing of temperature and shear rate, and decreases first and then increases with the increasing content of the La2O3. The Non-newtonian index increases with the increasing of temperature and increases first and then decreases with the increasing content of the La2O3. The viscous flow activation energy decreases with the increasing of shear rate, and it shows a downward as a whole with the increase of the content of La2O3.
出处
《塑料科技》
CAS
北大核心
2015年第11期23-27,共5页
Plastics Science and Technology
基金
河南工程学院功能纺织高分子材料科技创新团队(CXTD2013004)
河南工程学院博士基金项目(D2012029)
河南省教育厅科技攻关项目(14B150004)
郑州市重点科技攻关项目(郑州市科技局121PPTGG357-1)
关键词
聚丙烯
氧化镧
流变性能
非牛顿指数
黏流活化能
Polypropylene
Lanthanum oxide
Rheological properties
Non-newtonian index
Viscous flow activation energy
