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Accession number;05A0297539
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| Title;Analytical Pyrolysis of Bacterial Synthesized Poly (3-hydorxybutyrate-co-3-hydroxyvalerate) in the Presence of Tetramethylammonium Hydroxide |
| Author;
ITO TAKESHI
(Ind. Res. Inst. of Nagano)
SAITO NORIHIRO
(Ind. Res. Inst. of Nagano)
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Journal Title;Naganoken Kogyo Shikenjo Kenkyu Hokoku
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Journal Code:Y0010A
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ISSN:0913-672X
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VOL.;NO.24;PAGE.22-24(2004)
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| Figure&Table&Reference;FIG.2, TBL.2, REF.5 |
| Pub. Country;Japan |
| Language;Japanese |
| Abstract;It is well-known that polyesters afford carboxylic acids under high temperature in inert atmospheric conditions. In the cases of analytical pyrolysis by pyrolysis-gas chromatography using general-purpose silicone resin coated columns, peak broadenings caused by the carboxylic acids tend to unsatisfactory results. To solve the problems, a simultaneous methylation with thermolysis by tetramethylammonium hydroxide methanol solution has been widely applied to polymers having hydrolysable linkages. The authors adapted this method to biodegradable poly(3-hydroxybutyrate-co-3-hydroxyvalerate) by means of pyrolysis-gaschromatography/mass spectrometry. Cis-and/or trans- crotonic acids and 2-pentenoic acids correspond to the monomeric units of the polymer were detected as the main products without performing the methylation and these products appeared as broad and long-tailed peaks which formed up an inappropriate pyrogram both for qualitative and quantitative analysis. On the other hand, the simultaneous methylation resulted in a favorable chromatogram composed of the peaks of methyl esters derived from the acids mentioned above. (author abst.) |
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