Journal
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
Volume 89, Issue 1, Pages 111-119Publisher
SPRINGER
DOI: 10.1007/s10971-018-4803-y
Keywords
Siloxane hybrid material; Methacrylate hybrimer; Urethane linkage; Mechanical property; Thermo-mechanical property
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Funding
- Wearable Platform Materials Technology Center (WMC) - National Research Foundation of Korea (NRF) - Korean Government (MSIP) [NRF-2016R1A5A1009926]
- Korea Evaluation Institute of Industrial Technology [10051337]
- Korea Evaluation Institute of Industrial Technology (KEIT) [10051337] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Ultraviolet (UV)-curable and highly condensed (>86%) methacrylate phenyl oligo-siloxane (MPO) was synthesized by non-hydrolytic sol-gel condensation reaction between methacrylate and phenyl silane precursor. The MPO resin was then cured by an UV-initiated free-radical polymerization to fabricate a transparent (>90% at 550nm) methacrylate-siloxane hybrid material (methacrylate hybrimer). An urethane butanediol dimethacrylate (UBDM) monomer was synthesized as a cross-linker into the methacrylate hybrimer networks without micro-phase separation. The UBDM increased methacrylate conversion and mechanical properties due to the hydrogen bonding of the urethane linkage. The hardness, modulus, and strength were improved by UBDM insertion, the flexibility was even increased with 140% elongation, compared to neat MH. In addition, a storage modulus related to the thermo-mechanical properties was also enhanced by a denser cross-linkage with the urethane linkage. [GRAPHICS] HighlightsUV-curable methacrylate phenyl oligo-siloxane and methacryalte hybrimer can be simply fabricated by non-hydrolytic sol-gel reaction and free-radical polymerization.Urethane butandiol dimethacrylate (UBDM) can be synthesized by a simple reaction and the UBDM can be chemically connected with methacrylate hybrimer without micro-phase separation.Incorporation of the urethane linkage considerably enhances methacrylate conversion, mechanical and thermo-mechanical properties of methacrylate polymer, compared to other cross-linkers
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