Study of Melt-Blend of Crystalline Polymers under High Pressure
Project/Area Number |
61550025
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Research Category |
Grant-in-Aid for General Scientific Research (C)
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Allocation Type | Single-year Grants |
Research Field |
Applied materials
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Research Institution | Fukuoka University |
Principal Investigator |
HIRAKAWA Susumu Faculty of Science,Fukuoka University,Professor, 理学部, 教授 (20078570)
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Co-Investigator(Kenkyū-buntansha) |
TANAKA Kenji Faculty of Science,Fukuoka University, 理学部, 助手 (40090899)
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Project Period (FY) |
1986 – 1987
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Project Status |
Completed (Fiscal Year 1987)
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Budget Amount *help |
¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1987: ¥200,000 (Direct Cost: ¥200,000)
Fiscal Year 1986: ¥500,000 (Direct Cost: ¥500,000)
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Keywords | Polymer Blend / Melt Blend under High pressure / 相溶性 / 結晶性高分子のブレンド / 高圧下ブレンド / ブレンド系の融解と結晶化 |
Research Abstract |
For nylon 6 and nyoln 12 blend systems we have obtained the phase diagrams at pressures from atmospheric pressure to 600 MPa by high pressure differential thermal analysis (DTA) and depolarized light transmisslon method (LT). The phase diagrams obtained above about 500 MPa indicate that the curves of the melting and crystallization temperatures versus the concentration are similar to liquidus curves of eutectics.However,no eutectic line has been observed.It is considered that such an eutectic line as is seen in a phase diagram for low molecular materials does not exist or is not detectable because of extremely low mobility of molecules in polymers.The crystal structure of the blends have been investigated by X-ray diffraction method.The result shows that the blends obtained aboye about 500 MPa have the a form crystal,though below it the structure of nylon 6 is the a form while that of nylon 12 is the g form.In the process of this study, we made a new type X-ray diffraction apparatus for study of polymer blend and others.Aspeclal merit of this apparatus is that X-ray measurement can be carried out at high temperature up to about 400 C under hydrostatic high pressure up to about 600 MPa since the apparatus is inner-heat type.Moreover,we began to study on poly (ethylene terephthalate)(PET) and polycarbonate (PC) blends and found that the the 50/50 blend system seems to be compatible since PET cannot crystallize in the cooling process after the melt blend at 300゜C. This study will be further made in future.
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Report
(2 results)
Research Products
(13 results)