Polysiloxanes such as poly-APS and poly-EPS were prepared by the hydrolytic polycondensation of 3-aminopropyl(trimethoxy)silane (APS) and 3-N-2-aminoethylaminopropyl(trimethoxy)silane (EPS) in the nitrogen stream, respectively. PolyAPS or poly-EPS was mixed with bisphenol-A diglycidyl ether (828EL) in methyl ethyl ketone or dichloromethane, and the mixture was subjected to heating to prepare transparent and homogeneous thin films. A coating film was prepared by spincoating on glass and heating to give a pencil hardness of 9H when equivalent mixing was achieved. This hardness value is greater than that obtained using ethylenediamine in place of poly-APS or poly-EPS. The three-point-bending test was applied to the bulk bodies to show a maximum Young's modulus of 199.1 MPa for poly-APS and 322.6MPa for poly-EPS when equivalent mixing was achieved.
- 3-n-2-aminoethylaminopropyl(trimethoxy) silane
- Bisphenol a diglycidyl ether
- Organic-inorganic hybrid
- Self-standing film