| Project/Area Number |
06651044
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
高分子構造・物性(含繊維)
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| Research Institution | Nagaoka University of Technology |
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Principal Investigator |
NISHIO Yoshiyuki Nagaoka University of Technology, Department of BioEngineering, Associate Professor, 工学部, 助教授 (00156043)
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| Co-Investigator(Kenkyū-buntansha) |
IWATA Minoru Nagaoka College of Technology, Department of Industrial Chemistry, Associate Pro, 物質工学科, 助教授 (80042753)
SUZUKI Hidematsu Nagaoka University of Technology, Department of BioEngineering, Professor, 工学部, 教授 (00027054)
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| Project Period (FY) |
1994 – 1995
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| Project Status |
Completed (Fiscal Year 1995)
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| Budget Amount *help |
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1995: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1994: ¥1,500,000 (Direct Cost: ¥1,500,000)
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| Keywords | Cellulose / Chitin / Polymer Blends / Composites / IPN / Miscibility / Characterization / 高分子複合体 / ブレンド |
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| Research Abstract |
1. Chitin-based polymer blends and composites :
The synthetic polymers used as a mixing partner of chitin included poly (vinyl pyrrolidone) (PVP), poly (vinyl alcohol) (PVA), and poly (glycidyl methacrylate)(PGMA). Optically clear films of unmodified chitin/PVP blends were prepared over the whole composition range from mixed polymer solutions in formic acid/dichrolomethane by solvent evaporation. It was shown from the Tg estimation that the polymer pair forms a miscible phase in the binary blend films, irrespective of composition. Blend films of PVA with chitins having different degrees of deacetylation (DD) wre obtained successfully by a solution-casting or coagulation method with aqueous acetic acid or dimethylacetamide-lithium chloride (DMAc-LiCl) as common solvent. When the DD of the chitin component was in the range of 40-60%, the binary blends showed especially high miscibility. Microcomposites of chitin with PGMA were synthesized via photo-initiated polymerization in a gel state
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of chitin in GMA monomer as reactive impregnant. The chitin gels were formed from solutions in DMAc-LiCl by coagulation with a non-solvent. A well-developed 'IPN' type organization was realized in the composites.
2. Cellulose-based polymer blends and composites :
IPN composites made up of cellulose/poly (vinyl pyrrolidone-co-glycidyl methacrylate) [CELL/P (VP-co-GMA)] networks were synthesized successfully in film form from homogeneous solutions of cellulose by coagulation and subsequent polymerization of the resulting gels swollen in a VP/GMA monomer mixture. It was possible to introduce different types of intermolecular cross-links thereinto via adequate chemical and thermal treatments of the as-polymerized samples. Marked synergistic effects in physical and physicochemical properties including thermal transition, tensile behavior, swelling, and vapor absorption were demonstrated for such IPN composites of CELL/P (VP-co-GMA). Vapor-absorption property and gas permeablity were also investigated for films of CELL/PVP and CELL/PVA blends prepared by a solution casting or coagulation method. Less
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