| Project/Area Number |
10671806
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Conservative dentistry
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| Research Institution | KANAGAWA DENTAL COLLEGE |
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Principal Investigator |
YAMANAKA Hideki KANAGAWA DENTAL COLLEGE, DEPARTMENT OF DENTISTRY, ASSISTANT, 歯科部, 助手 (50182580)
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| Co-Investigator(Kenkyū-buntansha) |
NIHEI Tomotaro KANAGAWA DENTAL COLLEGE, DEPARTMENT OF DENTISTRY, ASSISTANT, 歯科部, 助手 (50237781)
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| Project Period (FY) |
1998 – 2000
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| Project Status |
Completed (Fiscal Year 2000)
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| Budget Amount *help |
¥3,300,000 (Direct Cost: ¥3,300,000)
Fiscal Year 2000: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1999: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1998: ¥1,500,000 (Direct Cost: ¥1,500,000)
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| Keywords | Coupling agent / Water-resistance / Tensile bond strength / Hydrolysis / Surface free energy / Thermogravimetric analysis / Adsorption / FTIR / シランカップリング剤 / 耐水耐久性 / 引っ張り接着強さ / 熱分析 |
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| Research Abstract |
To improve the water resistance of the polysiloxane at the silca-resin interface, a mixture of 3-methacryoxypropyltrimethoxysilane( 3-MPS )and several hydrophobic poly (fluoro)alkyltrimethoxysilanes at various ratio was applied on a glass plate.
The results were as follows :
The tensile bond strength of the specimen treated with the mixture of 3-MPS and poly (fluoro)alkyltrimethoxysilanes with alkle group containing 4 or 6 carbon number was siginificantly high compared with that of 3-MPS treated specimen. And the specimen demonstrated excellent water-resistance even after immersion and thermal stress.
It may be considered that the excellent water-resistance of the specimen was due to the introduction of hydrophobic poly (fluoro)alkyl group. However, the cause of its high tensile bond strength has been left unsolved. To make clear the cause, the contact angle against the bonding monomer, the surface of the glass treated with the silane mixture, the determination of trace of fluorine on the surface by EPMA, and the relationship between the tensile bond strength and the chain length of the poly (fluoro)alkyl group and the variety of alkyl group were studied.
As a result, it was thought that cause may be due to the increase of affinity of the bonding monomer to the surface treated with the silane mixture and the interpenetration of followed by polymerization of bonding monomer composed of bisfunctional dimethacylate.
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