| Project/Area Number |
15350126
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (B)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Polymer/Textile materials
|
|---|
| Research Institution | Yamagata University |
|---|
Principal Investigator |
ENDO Takeshi Yamagata University, Faculty of Engineering, Professor, 工学部, 教授 (40016738)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
HINO Tetsuo Yamagata University, Graduate School of Science and Engineering, Assistant Professor, 大学院・理工学研究科, 助手 (50361275)
KANAZAWA Akihiko Yamagata University, Faculty of Engineering, Associate Professor, 工学部, 助教授 (80272714)
|
|---|
| Project Period (FY) |
2003 – 2004
|
| Project Status |
Completed (Fiscal Year 2004)
|
| Budget Amount *help |
¥14,400,000 (Direct Cost: ¥14,400,000)
Fiscal Year 2004: ¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 2003: ¥12,200,000 (Direct Cost: ¥12,200,000)
|
|---|
| Keywords | Nano-material / No-shrinkage / Expansion / Three-dimensional structure / Volume-shrinkage / 非収縮性 |
|---|
| Research Abstract |
Ring-opening methathesis polymerization of norbomenes bearing cyclic carbonate structures afforded the corresponding polynortbomenes. The volume shrinkages in the polymerization, significantly lower than typical single-ring-opening polymerizations, depended on the ring-size of the carbonate rings, the molecular weights of the polymers, and the cis-trans contents in the main chains. Copolymeriation of the norbomenes bearing carbonate structures with cyclooctene also afforded the polymers with controllable volume changes. The resulting polymers having carbonate rings can be crosslinked via cationic ring-opening polymerization to obtain three-dimensional polymers. These results have demonstrated that low volume shrinkage system has been also constructed for metathesis polymerization, which has been focused on as an industrially important polymerization method.
In the cationic cross-linking of the polymers bearing spiroorthocarbonate (SOC) structures in the side chains, we have found that the copolymer component highly affects the volume change behavior during the crosslinking. That is, the crosslinking of the copolymers containing the units from electron-donating monomers expands the volume even if the SOC contents were lower. In contrast, that of the copolymers containing the units from electron-withdrawing monomers exhibits moderate volume expansion, which increased as the increase of the SOC units.
|
