黄麻纤维增强聚丙烯界面剪切强度的研究

Study on Interfacial Shear Strength in Jute Fiber Reinforced Polypropylene

研究了黄麻纤维增强聚丙烯体系中黄麻的表面处理以及基体中改性剂和无机填料对界面剪切强度的影响。实验表明,NaOH 和硅烷偶联剂(KH550)表面处理以及基体改性均能够增强界面黏结,当 NaOH 浓度为2%时界面剪切强度达到5.3 MPa,且处理时间对界面剪切强度影响不大;KH550浓度为0.5%时界面剪切强度达到5.5 MPa;当基体中马来酸酐接枝聚丙烯(PP-g-MAH)含量为2%时界面剪切强度达到5.7MPa;添加纳米碳酸钙和滑石粉后,界面剪切强度随之增大,但含量分别超过20%和10%后界面结合反而变差。

Influences of fiber treatment, matrix modifier, and inorganic filler on the interracial shear strength（IFSS） of jute fiber reinforced polypropylene were studied. It showed that the treatment of fiber surface enhanced the interface adhesion. When treated with a NaOH solution of 2 %, the IFSS reached 5.3 MPa. The treating time had little influence on IFSS. The treatmernt with 0.5 % KH550 resulted in an IFSS of 5.5 MPa. Introduction of 2 % PP-g-MAH into the matrix an enhanced IFSS of 5.7 MPa was achieved. Inorganic fillers such as nano CaCO3 and talc may also improved the interface shear strength, however, when the content of nano CaCO3 or talc exceeded 20 % or 10 %, respectively, negative effect on interface adhesion was observed.