Preparation and Characterization of PA 46/MWCNT Nanocomposites

• Main Authors: Kuo Feng Kao, 高國峰
• Other Authors: F. C. Chiu
• Format: Others
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/70733952431797863252

碩士 === 長庚大學 === 化工與材料工程研究所 === 97 === In this study, polyamide 46 (PA 46)-based nanocomposites were prepared by solution mixing method. Functionalized multi-walled carbon nanotubes (MWCNTs) served as the reinforcing filler. The TGA, FTIR, FESEM and TEM results confirmed that the MWNTs were successfully functionalized by the mixed acids. The treatment/modification could also create defects on the surface of MWCNTs. The FESEM observation on the fractured surfaces of the composites showed not only on an uniform dispersion of MWCNTs within the matrix but also an interfacial interactions between MWCNTs and PA 46. A longer treatment time caused a stronger adhesion between PA 46 and MWCNTs. The crystallite sizes L(010/110) of PA 46, determined by XRD, decreased with increasing MWCNTs contents. The DSC results indicated that the presence of MWCNTs nucleated and enhanced the crystallization of PA 46 by acting as a heterogeneous nucleation agent. Isothermal crystallization results showed that adding MWCNTs into PA 46 slightly decreased PA 46’s crystal growth dimension. The melting temperature of PA 46 shifted to higher temperatures after adding MWCNTs.