Preparation of Clay/PS nanocomposites by surface polymerization and their physical properties

• Main Authors: Yichyr Jan, 詹益池
• Other Authors: Jengyue Wu
• Format: Others
• Language: zh-TW
• Online Access: http://ndltd.ncl.edu.tw/handle/64811206758317793896

碩士 === 國立中興大學 === 材料工程學研究所 === 87 === Montmorillonite, MMT, was modified by surface polymerization: formation of admicelle, styrene adsolubilization and polymerization. The m-MMT (modified by surface polymerization) was compounded with polystyrene (PS) to prepare MMT/PS nanocomposite. CPC (cetyl pyridinium chloride) was used to perform the ion-exchange with Na+ on MMT surface and to form admicelle (adsorbed micelle) on MMT surface. Styrene was adsolubilized into the admicelle to proceed the in-situ polymerization. The samples after surface polymerization were analyzed by DSC、light scattering、TGA and XRD to measure glass transition temperature (Tg) 、molecular weight of PS formed on MMT、PS conversion and d-spacing. The MMT/PS composites were prepared by Brabender mixer and XRD and TEM were employed to observe the dispersion of MMT in PS. The measured E'' 、E'''' and tanδ of MMT/PS nanocomposites by DMA was compared with those of pure PS. The modulus (E'' and E'''') of MMT/PS composites are higher than those of pure PS and MMT was dispersed in PS uniformly. In this research, we have prepared MMT/PS nanocomposites and the mechanical and thermal properties were improved by MMT reinforcement through surface modification of MMT.