Nano-indentation profiles of intrinsic hardness and modulus of films based on silsesquioxane modified with titanium tetrabutoxide |
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| Authors: | CHEN Ping SUN Ke-jun LIU Jin-cheng CUI Jin-jin HU Li-jiang |
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| Affiliation: | Chemstry Center, Harbin University of Commerce, Harbin 1500076, China;Dept.of Applied Chemistry, Harbin Institute of Technology, Harbin 150001, China;Dept.of Optoelectronic Science and Technology,Harbin Institute of Technology,Harbin 150001,China;Dept.of Applied Chemistry, Harbin Institute of Technology, Harbin 150001,China |
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| Abstract: | This study is to analyze the influence of the modifier, 5 ～ 25 wt % titanium tetrabutoxide ( TBO),on the hardness and elastic modulus of the films based on SSO deriving from hydrolytic condensation of (3-glycidoxypropyl) trimethoxysilane (GPMS) and vinyltrimethoxysilane (VMS), by the continuous stiffness measurement (CSM) technique of an instrumented-indentation testing (IIT) device. Films were synthesized by adding the stoichiometric amount of ethylenediamine (EDA) and benzoyl proxide (BPO) to SSO solutions in ethanol, dip-coating over glass substrates, and curing using an appropriate thermal cycle. Intrinsic values of hardness and elastic modulus were determined with the average values in "plateau region" from "four-layer"explanation. And the brittle index of the modified coating systems was analyzed. |
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| Keywords: | silesesquioxanes (3-glycidoxypropyl)trimethoxysilane vinyltrimethoxysilane titanium tetrabutoxide hardness elastic modulus brittle index |
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