Design of a measuring system of minute differential pressure by capillary and application to analysis of chemical state of polymeric materials
Project/Area Number |
06650933
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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 |
工業分析化学
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Research Institution | MIE UNIVERSITY |
Principal Investigator |
MORI Sadao Mie-Univ, Faculty of Engineering, Associate Professor, 工学部, 助教授 (10020421)
|
Project Period (FY) |
1994 – 1995
|
Project Status |
Completed (Fiscal Year 1995)
|
Budget Amount *help |
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1995: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1994: ¥1,400,000 (Direct Cost: ¥1,400,000)
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Keywords | differential pressure transducer / differential viscometer / polymer solution / molecular weight / intrinsic viscosity / polystirene / polyvinyl chloride / sodium polystirene sulfonate / 固有粘土 |
Research Abstract |
The measuring system designed consisted of two capillaries of the same size (0.5 mm i.d. and 40 cm in length) ; one for the mobile phase and the other for both the mobile phase and the sample solution. Two differential pressure transducers were installed at the both ends of capillaries. Amplifier for the difference of the output of two transducer was prepared. Mobile phase was flowed with a pump and the amount of the sample solutions injected was 3 ml. Several polystiren solutions of different molecular weight and different concentrations were prepared and diffrential pressure was measured. From the plot of differential pressure and sample concentration, intrinsic viscosities of the polystirene samples were calculated. From the measurement of the differential pressure of polystirene samples of narrow molecular weight distributions, Mark-Houwink-Sakurada parameters were measured. Molecular weights of polystirene samples were calculated using these parameters and intrisic viscosities and the results were in good aggreament to the vendor values. Similary the parameters of polyvinyl chloride were measured. Sample concentrations of polyvinyl chloride had to be 1/10 to the usual ones and the viscosity measurement of such dilute solutions was possible only this system. Comparison of the performance of the system with an Ubelohde glass capillary viscometer showed that this system was superior to the latter viscometer on the points of analysis time, sample volume, and precision. This measuring system was connected to the SEC system and molecular weight averages of polystirenes were measured. The measurement was capable after minor modification in the system and the results were in good agreement with the usual relative method. The system investigated here can be used as the molecular sensitive detector for SEC.
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Report
(3 results)
Research Products
(18 results)