The Morphology Control and the Oxygen Permeability of Poly (methyl methacrylate) -graft-Polydimethylsiloxane

• Published in: KOBUNSHI RONBUNSHU 1992/12/25, Vol.49(12), pp.961-967
• Main Authors: TONE, Seiji, NAKATA, Akira, MORI, Hiroshi, YAMAMOTO, Naoki
• Format: Article
• Language: eng ; jpn
• Subjects: Fiber; Macromonomer; Morphology; Oxygen Permeability; Poly (methyl methacrylate) -graft-Polydimethylsiloxane; Small Angle X-Ray Scattering
• ISSN: 0386-2186; 1881-5685
• DOI: 10.1295/koron.49.961

Poly (methyl methacrylate) -graft-polydimethylsiloxane was synthesized by the copolymerization of methyl methacrylate (MMA) with macromonomer having a methacryloyl group at one end of polydimethylsiloxane (PDMS). The fibers formed by melt spinning of this copolymer were bundled up. After being impregnated by the methacrylate compounds, they were polymerized to obtain a shaped article. The focus of this paper is investigation of the relation between micro phase separation state and oxygen permeability. Small angle X-ray scattering showed that the domains of PDMS were oriented to the direction of the fiber axis in proportion to the increase of the draft ratio (=winding speed/extruding speed). The value of oxygen permeability parallel to the direction of the fiber axis was nearly equal to the value calculated on the assumption that continuous phase would be formed by PDMS domains parallel to the direction of the fiber axis. The oxygen permeability, parallel to the direction of the fiber axis was higher than that of non-oriented sample. It was clear that the oxygen permeability of the shaped article could be controlled by its morphology.