摘要
采用熔融共混法制备了聚酰胺66/铷铁硼(PA66/Nd Fe B)复合材料,并对其熔体流变行为进行了系统研究。结果表明:PA66/Nd Fe B复合材料的表观黏度(ηa)随着剪切速率的增加而降低,为假塑性流体;ηa随着温度的升高而降低,随着Nd Fe B用量的增加而提高;非牛顿指数(n)随着温度的升高而增大,随着Nd Fe B用量的增加而降低;熔体的黏流活化能(ΔEη)随着剪切速率的提高而增大,并逐渐趋于平缓;另外,ΔEη随着Nd Fe B用量的增加而减小,即复合材料的温敏性随着Nd Fe B用量的增加而下降。
The Polyamide 66(PA66)/Nd Fe B composite was prepared by melting blending, and the melting rheological properties were systematically investigated. The results show that: the apparent viscosity(ηa) decreases with the increasing of shear rate, it belongs to pseudo plastic fluid; ηa decreases with the increase of temperature and increases with the increase of Nd Fe B addition. The non-Newtonian index(n) of PA66/Nd Fe B composites goes up with the increase of temperature, and the n value decreases as the increase of Nd Fe B content. The viscous flow activation energy(ΔEη) of PA66/Nd Fe B composites decreases with the increase of shear rate; with the increase of Nd Fe B content, the value of ΔEη decreases and the thermosensitivity gradually transforms to shear sensitivity.
出处
《塑料科技》
CAS
北大核心
2015年第8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
聚酰胺66
铷铁硼磁粉
流变性能
非牛顿指数
黏流活化能
Polyamide 66
Nd Fe B magnets
Rheological property
Non-Newtonian index
Viscous flow activation energy