| Project/Area Number |
58850187
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| Research Category |
Grant-in-Aid for Developmental Scientific Research
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| Allocation Type | Single-year Grants |
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| Research Field |
高分子合成
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| Research Institution | Kyoto Institute of Technology |
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Principal Investigator |
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| Project Period (FY) |
1983 – 1985
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| Project Status |
Completed (Fiscal Year 1985)
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| Budget Amount *help |
¥8,500,000 (Direct Cost: ¥8,500,000)
Fiscal Year 1985: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1984: ¥1,400,000 (Direct Cost: ¥1,400,000)
Fiscal Year 1983: ¥6,100,000 (Direct Cost: ¥6,100,000)
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| Keywords | moisture-cure / aminopropyltriethoxysilane / silane coupling reagent / epichlorohydrin rubber / chlorinated polyethylene / クロロプレンゴム |
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| Research Abstract |
1. Moisture-cure of epichlorohydrin rubber (ECO) ECO compounded with aminopropyltriethoxysilane (APS) and dibutyltin dilaurate (DBTDL) was moisture-curable; the resulting network-chain density attained 5 x <10^(-4)> mol/ <cm^3> and the maximum tensile strength was 7.0 MPa. This elastomer showed an extremely high hygroscopic nature due to hydrophilicity of ECO.
2. Moisture-cure of chlorinated polyethylene (CPE)
Low reactivity in chlorine of CPE prevents grafting reaction with APS even after an addition of DBTDL. And thus, CPE cannot be cured with moisture.
3. Moisture-cure of chloroprene rubber (CR)
CR compounded with APS and DBTDL was moisture-curable; the network-chain density was 3 x <10^(-4)> mol/ <cm^3> and the maximum tensile strength was 10 MPa. However, an unavoidable prevulcanization reaction between CR and APS reduced the tensile strength.
4. Conclusion
Halogen containing polymers, 1-chlorobutadiene-butadiene copolymer, chlorinated butyl rubber, brominated butyl rubber, chlorosulfonated polyethylene, epichlorohydrin rubber, and chloroprene rubber were moisture-curable in the presence of APS and DBTDL. The resulting elastomers gave relatively high tensile strength which were comparable with those of usual heat-vulcanizated rubbers. Investigations of the moisture-curing reaction enabled us to determine the optimal reaction conditions. Silica composites gave the moisture-cured rubber high reinforcing effects. From these results, we could prove a feasibility of moisture-cure.
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Report
(1 results)
Research Products
(7 results)
