Non-random degradation behavior of poly(3-hydroxybutyrate)in pyrolysis.
Dynamic and isothermal degradation of PHB were conducted in TG, Py-GC/MS, and glass tube oven in order to determine the PHB degradation mechanism. The apparent activation energy of PHB pyrolysis showed a constant value from beginning to the end of the degradation, suggesting that the weight loss occ...
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| Format: | Article |
| Language: | English English |
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American Chemical Society
2008
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| Online Access: | http://psasir.upm.edu.my/id/eprint/15832/ http://psasir.upm.edu.my/id/eprint/15832/1/Non-random%20degradation.pdf |
| _version_ | 1848842789754765312 |
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| author | Ariffin, Hidayah Nishida, Haruo Shirai, Yoshihito Hassan, Mohd Ali |
| author_facet | Ariffin, Hidayah Nishida, Haruo Shirai, Yoshihito Hassan, Mohd Ali |
| author_sort | Ariffin, Hidayah |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | Dynamic and isothermal degradation of PHB were conducted in TG, Py-GC/MS, and glass tube oven in order to determine the PHB degradation mechanism. The apparent activation energy of PHB pyrolysis showed a constant value from beginning to the end of the degradation, suggesting that the weight loss occurred during the pyrolysis was resulted from one main reaction. Integration values of total ion count peaks in Py-GC/MS spectra showed that crotonic acid was mainly produced at a temperature range of 270-280ºC. From the kinetic analysis of weight loss behavior, it is proposed that there are some kinetically favored scissions occurring at the chain ends, where the degradation proceeded by a 0th-order weight loss process in the middle stage. The observed 0th-order weight loss process was assumed to be an unzipping reaction occurring at ester groups neighboring the crotonate end groups. |
| first_indexed | 2025-11-15T08:04:43Z |
| format | Article |
| id | upm-15832 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English English |
| last_indexed | 2025-11-15T08:04:43Z |
| publishDate | 2008 |
| publisher | American Chemical Society |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-158322015-12-04T03:55:20Z http://psasir.upm.edu.my/id/eprint/15832/ Non-random degradation behavior of poly(3-hydroxybutyrate)in pyrolysis. Ariffin, Hidayah Nishida, Haruo Shirai, Yoshihito Hassan, Mohd Ali Dynamic and isothermal degradation of PHB were conducted in TG, Py-GC/MS, and glass tube oven in order to determine the PHB degradation mechanism. The apparent activation energy of PHB pyrolysis showed a constant value from beginning to the end of the degradation, suggesting that the weight loss occurred during the pyrolysis was resulted from one main reaction. Integration values of total ion count peaks in Py-GC/MS spectra showed that crotonic acid was mainly produced at a temperature range of 270-280ºC. From the kinetic analysis of weight loss behavior, it is proposed that there are some kinetically favored scissions occurring at the chain ends, where the degradation proceeded by a 0th-order weight loss process in the middle stage. The observed 0th-order weight loss process was assumed to be an unzipping reaction occurring at ester groups neighboring the crotonate end groups. American Chemical Society 2008 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/15832/1/Non-random%20degradation.pdf Ariffin, Hidayah and Nishida, Haruo and Shirai, Yoshihito and Hassan, Mohd Ali (2008) Non-random degradation behavior of poly(3-hydroxybutyrate)in pyrolysis. Polymer Preprints, 49 (2). pp. 451-452. ISSN 0032-3934 English |
| spellingShingle | Ariffin, Hidayah Nishida, Haruo Shirai, Yoshihito Hassan, Mohd Ali Non-random degradation behavior of poly(3-hydroxybutyrate)in pyrolysis. |
| title | Non-random degradation behavior of poly(3-hydroxybutyrate)in pyrolysis. |
| title_full | Non-random degradation behavior of poly(3-hydroxybutyrate)in pyrolysis. |
| title_fullStr | Non-random degradation behavior of poly(3-hydroxybutyrate)in pyrolysis. |
| title_full_unstemmed | Non-random degradation behavior of poly(3-hydroxybutyrate)in pyrolysis. |
| title_short | Non-random degradation behavior of poly(3-hydroxybutyrate)in pyrolysis. |
| title_sort | non-random degradation behavior of poly(3-hydroxybutyrate)in pyrolysis. |
| url | http://psasir.upm.edu.my/id/eprint/15832/ http://psasir.upm.edu.my/id/eprint/15832/1/Non-random%20degradation.pdf |