Using the polymers with three different compositions, the effect of mole ratio of TEOS and MTES on the properties of the coating was investigated.
TEOS has four ethoxy functional groups but MTES has three.
The mole ratio of TEOS/ MTES was 1:1, and the number of moles of silicates means the total number of moles of TEOS and MTES.
composition TEOS: MTES Hardness Adhesion surface PS40-6 PS40 0.
When phytic acid was used as the catalyst, the phytic acid could react with GPMS first via the ring-opening reaction of epoxy, followed by the hydrolysis and condensation of MTES, TEOS, and GPMS to form the phytic acid incorporated polysilsesquioxane networks by chemical bonding.
In this study, the polysilsesquioxanes were successfully synthesized via the sol-gel process of MTES, GPMS, and TEOS using phytic acid, tannic acid, 1-hydroxyethylidene-1,1-diphosphonic acid, and hydrochloric acid as the catalyst, respectively.