Anhydride production as an additional mechanism of poly(3-hydroxybutyrate)pyrolysis.
Anhydrides production is newly proposed as an additional pyrolysis mechanism of a biopolymer, poly(3hydroxybutyrate) (PHB). In spite of many suggestions of multiple degradation mechanisms, simple random chain scission by b elimination has been accepted as an exclusive mechanism of the thermal degrad...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English English |
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Wiley Periodicals Inc.
2009
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| Online Access: | http://psasir.upm.edu.my/id/eprint/13111/ http://psasir.upm.edu.my/id/eprint/13111/1/Anhydride%20production%20as%20an%20additional%20mechanism%20of%20poly.pdf |
| _version_ | 1848842022663749632 |
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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 | Anhydrides production is newly proposed as an additional pyrolysis mechanism of a biopolymer, poly(3hydroxybutyrate) (PHB). In spite of many suggestions of multiple degradation mechanisms, simple random chain scission by b elimination has been accepted as an exclusive mechanism of the thermal degradation of PHB. However, a wide range of activation energy value of the degradation and the deviation from the random chain scission statistics have suggested the presence of other kinds of mechanism out of the random scission. To confirm other mechanisms out of the random scission, minor pyrolyzates from PHB were characterized with
1H/13C-NMR, Fourier transform infrared spectroscopy, and fast atom bombardment mass spectrometry. As a result, crotonic anhydride and its oligomers were detected as minor products from condensation reactions between carboxyl groups. The anhydrides production must be one reaction out of the conforming process to the random degradation statistics and contribute to the complexity of PHB pyrolysis. An expected thermal degradation pathway of PHB was proposed. |
| first_indexed | 2025-11-15T07:52:32Z |
| format | Article |
| id | upm-13111 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English English |
| last_indexed | 2025-11-15T07:52:32Z |
| publishDate | 2009 |
| publisher | Wiley Periodicals Inc. |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-131112015-11-18T03:52:47Z http://psasir.upm.edu.my/id/eprint/13111/ Anhydride production as an additional mechanism of poly(3-hydroxybutyrate)pyrolysis. Ariffin, Hidayah Nishida, Haruo Shirai, Yoshihito Hassan, Mohd Ali Anhydrides production is newly proposed as an additional pyrolysis mechanism of a biopolymer, poly(3hydroxybutyrate) (PHB). In spite of many suggestions of multiple degradation mechanisms, simple random chain scission by b elimination has been accepted as an exclusive mechanism of the thermal degradation of PHB. However, a wide range of activation energy value of the degradation and the deviation from the random chain scission statistics have suggested the presence of other kinds of mechanism out of the random scission. To confirm other mechanisms out of the random scission, minor pyrolyzates from PHB were characterized with 1H/13C-NMR, Fourier transform infrared spectroscopy, and fast atom bombardment mass spectrometry. As a result, crotonic anhydride and its oligomers were detected as minor products from condensation reactions between carboxyl groups. The anhydrides production must be one reaction out of the conforming process to the random degradation statistics and contribute to the complexity of PHB pyrolysis. An expected thermal degradation pathway of PHB was proposed. Wiley Periodicals Inc. 2009-01 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/13111/1/Anhydride%20production%20as%20an%20additional%20mechanism%20of%20poly.pdf Ariffin, Hidayah and Nishida, Haruo and Shirai, Yoshihito and Hassan, Mohd Ali (2009) Anhydride production as an additional mechanism of poly(3-hydroxybutyrate)pyrolysis. Journal of Applied Polymer Science, 111 (1). pp. 323-328. ISSN 0021-8995 10.1002/app.29034 English |
| spellingShingle | Ariffin, Hidayah Nishida, Haruo Shirai, Yoshihito Hassan, Mohd Ali Anhydride production as an additional mechanism of poly(3-hydroxybutyrate)pyrolysis. |
| title | Anhydride production as an additional mechanism of poly(3-hydroxybutyrate)pyrolysis. |
| title_full | Anhydride production as an additional mechanism of poly(3-hydroxybutyrate)pyrolysis. |
| title_fullStr | Anhydride production as an additional mechanism of poly(3-hydroxybutyrate)pyrolysis. |
| title_full_unstemmed | Anhydride production as an additional mechanism of poly(3-hydroxybutyrate)pyrolysis. |
| title_short | Anhydride production as an additional mechanism of poly(3-hydroxybutyrate)pyrolysis. |
| title_sort | anhydride production as an additional mechanism of poly(3-hydroxybutyrate)pyrolysis. |
| url | http://psasir.upm.edu.my/id/eprint/13111/ http://psasir.upm.edu.my/id/eprint/13111/ http://psasir.upm.edu.my/id/eprint/13111/1/Anhydride%20production%20as%20an%20additional%20mechanism%20of%20poly.pdf |