二軸押出機を用いたポリジメチルシロキサンのポリメタクリル酸エチルヘの溶融グラフト反応
Graft Modification of Poly (methylmethacrylate) by Poly (dimethylsiloxane) in Twin Screw Extruder
牧村洋一郎・吉田絵里・北尾敏男
Makimura Yoichiro / Yoshida, Eri / Kitao, Toshio
PMMA was reacted with PDMS (α, ω-diamino polydimethylsiloxane) in the presence of FeCl3 in a twin screw extruder at 230℃. The reaction products were analyzed by 1H NMR : The signal from methyl proton of PDMS was ascribed at 0 ppm, indicating the introduction of PDMS onto PMMA. The conversion monotonically increased with time and reached almost 100% after 30 min. It was found that CO2 gas flowing in the twin screw extruder promoted the reaction. The surface tension of the product film cast from dichloromethane was 23.0 dyn/cm, which was smaller than that of PMMA film, 41.2 dyn/cm. The surface concentration of PDMS of the product was 42.4% when the overall concentration of PDMS was 2%.
Key words: Poly (methylmethacrylate) / Polysiloxane / Aminolysis / Twin Screw Extruder