Graft polymerization onto nano-sized SiO2 surface and its application to the modification of PBT

Preparation and characterization of poly(butylene terephthalate)/silica nanocomposites

“…It can be concluded that some PBT chains can be grafted onto silica through chemical bonding rather than physical absorption. Similar reaction has been reported by Bikiaris et al on poly(ethylene terephthalate)/silica nanocomposites [21] and Che et al on PBT/silica nanocomposites [12]. The amount of PBT grafted onto the surface of silica was determined by TGA at the heating rate of 108CÁmin…”

“…As can be seen in the FTIR spectrum of pure PBT (Fig. 1A), there are a lot of peaks, while the most characteristic are those in the region of 1720, 1600-1500, 1100 cm À1 for C¼ ¼O stretching vibration of the ester carbonyl group, stretching vibration of backbone of benzene, and CÀ ÀO stretching vibration, respectively [12]. The absorption band at around 1100 cm À1 in Fig.…”

“…However, the disadvantages such as low impact strength and heat distortion temperature limit the applications of PBT. Many attempts have been made to obtain desirable properties of PBT by blending it with other polymers or fillers [7][8][9][10][11][12][13][14][15][16][17][18][19]. Among these blends, PBT/inorganic nanocomposites have attracted more and more interest, especially PBT/clay nanocomposites have been widely investigated.…”

Surface properties of silica nanoparticles modified with polymers for polymer nanocomposite applications

“…The presence and the amount of grafted polymers on the silica surface can be estimated by TG [24]. Fig.…”

Study of surface modification of nano-SiO2 with macromolecular coupling agent (LMPB-g-MAH)

“…The dispersion of nano-SiO 2 particles as well as the mechanism of stable colloidal dispersion was discussed in dimethylbenzene [24][25][26], whose polar is quite low. The using efficiency of LMPB-g-MAH as a modifier was also studied.…”