期刊
POLYMERS
卷 13, 期 10, 页码 -出版社
MDPI
DOI: 10.3390/polym13101564
关键词
flexible hard coating; sol– gel reaction; polyhedral oligomeric silsesquioxane; ladder-like polysilsesquioxane
资金
- Industrial Core Technology Development Program - Ministry of Trade, Industry, & Energy of Korea [20004032, 20009693]
- Technology development Program - Ministry of SMEs and Startups (MSS, Korea) [S2970293]
- Korea Evaluation Institute of Industrial Technology (KEIT) [20004032, 20009693] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- Korea Technology & Information Promotion Agency for SMEs (TIPA) [S2970293] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
EPOSS and LPSQ were synthesized through sol-gel reaction, with EPSQ having higher molecular weight and uniform surface morphology, while EPOSS exhibited stronger aggregation leading to nonuniform surface morphology. EPSQ showed higher hardness and better folding resistance compared to EPOSS.
EPOSS of polyhedral oligomeric silsesquioxanes (POSS) mixture structure and LPSQ of ladder-like polysilsesquioxane (LPSQ) structure were synthesized via sol-gel reaction. EPSQ had a high molecular weight due to polycondensation by potassium carbonate. The EPSQ film showed uniform surface morphology due to regular double-stranded structure. In contrast, the EPOSS-coated film showed nonuniform surface morphology due to strong aggregation. Due to the aggregation, the EPOSS film had shorter d-spacing (d1) than the EPSQ film in XRD analysis. In pencil hardness and nanoindentation analysis, EPSQ film showed higher hardness than the EPOSS film due to regular double-stranded structure. In addition, in the in-folding (r = 0.5 mm) and out-folding (r = 5 mm) tests, the EPSQ film did not crack unlike the EPOSS coated film.
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