caa a22 4500 463233328 CHVBK 20180405153249.0 cr unu---uuuuu 170326e20070701xx s 000 0 eng 10.1007/s10853-006-0537-2 doi (NATIONALLICENCE)springer-10.1007/s10853-006-0537-2 Surface structure, grafted chain length, and dispersion analysis of PBT prepolymer grafted nano-silica [Elektronische Daten] [Jianfei Che, Yinghong Xiao, Baoyong Luan, Xiaoming Dong, Xin Wang] Dispersion of nano-particles plays a key role in preparing high-performance nano-composites. Steric hindrance stability mechanisms can be applied to improve the dispersibility and stability of nano-particles. The steric hindrance layer can be established when graft polymerization of PBT prepolymer is performed onto the surface of nano-particles. Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) characterization revealed the chemical linkage between nano-silica and the grafted prepolymer. Based on XPS and thermal gravimetric analysis (TGA), it is conjectured that the grafted PBT prepolymer was mainly distributed on the surfaces of nano-silica. From transmission electron microscopy (TEM) images the polymer coverage can be observed. System vacuum played an important role in determining the graft amount and the length of the grafted chains. The relationship between vacuum and chain length was investigated by calculating $$ \overline M _v $$ and TGA. The lower the vacuum, the more the weight loss, and thus the longer the grafted chains. Sedimentation experiments and atomic force microscope (AFM) characterization showed that the grafted nano-silica prepared under the vacuum of 3.9kPa had the best dispersibility and could disperse homogeneously in tetrachloroethane. Under these conditions, the length of the grafted molecule chains was approximately, 16 units. Springer Science+Business Media, LLC, 2007 Che Jianfei School of Chemical Engineering, Nanjing University of Science and Technology, 210014, Nanjing, P.R. China aut Xiao Yinghong School of Chemical Engineering, Nanjing University of Science and Technology, 210014, Nanjing, P.R. China aut Luan Baoyong School of Chemical Engineering, Nanjing University of Science and Technology, 210014, Nanjing, P.R. China aut Dong Xiaoming School of Chemical Engineering, Nanjing University of Science and Technology, 210014, Nanjing, P.R. China aut Wang Xin School of Chemical Engineering, Nanjing University of Science and Technology, 210014, Nanjing, P.R. China aut Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/13(2007-07-01), 4967-4975 0022-2461 42:13<4967 2007 42 10853 https://doi.org/10.1007/s10853-006-0537-2 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10853-006-0537-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Che Jianfei School of Chemical Engineering, Nanjing University of Science and Technology, 210014, Nanjing, P.R. China aut NATIONALLICENCE 700 1- Xiao Yinghong School of Chemical Engineering, Nanjing University of Science and Technology, 210014, Nanjing, P.R. China aut NATIONALLICENCE 700 1- Luan Baoyong School of Chemical Engineering, Nanjing University of Science and Technology, 210014, Nanjing, P.R. China aut NATIONALLICENCE 700 1- Dong Xiaoming School of Chemical Engineering, Nanjing University of Science and Technology, 210014, Nanjing, P.R. China aut NATIONALLICENCE 700 1- Wang Xin School of Chemical Engineering, Nanjing University of Science and Technology, 210014, Nanjing, P.R. China aut NATIONALLICENCE 773 0- Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/13(2007-07-01), 4967-4975 0022-2461 42:13<4967 2007 42 10853 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer