Simple modification measurement of photodegradability of polymers by using photo-induced chemiluminescence technique / Siti Farhana Zakaria and Keith R. Millington
Polymers and organic materials that are exposed to sunlight undergo photooxidation, which leads to deterioration oftheir physical properties. To allow adequate performance under outdoor conditions, synthetic polymers require additives such as antioxidants and UV absorbers. A major problem with optim...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Research Management Institute (RMI)
2013
|
| Subjects: | |
| Online Access: | https://ir.uitm.edu.my/id/eprint/13047/1/AJ_SITI%20FARHANA%20ZAKARIA%20SRJ%2013%201.pdf |
| _version_ | 1825734093779763200 |
|---|---|
| author | Zakaria, Siti Farhana Millington, Keith R. |
| author_facet | Zakaria, Siti Farhana Millington, Keith R. |
| author_sort | Zakaria, Siti Farhana |
| collection | UITM |
| description | Polymers and organic materials that are exposed to sunlight undergo photooxidation, which leads to deterioration oftheir physical properties. To allow adequate performance under outdoor conditions, synthetic polymers require additives such as antioxidants and UV absorbers. A major problem with optimising polymer formulations to maximise their working life span is that accelerated weathering tests are empirical. The conditions differ significantly from real weathering situations, and samples require lengthy
irradiation period. Degradation may not be apparent in the early stages of exposure, although this is when products such as hydroperoxides are formed which later cause acceleration ofoxidation. Asimple way ofquantifying the
number of free radicals presents in organic materials following exposure to light or heat is by measuring chemiluminescence (CL) emission. Most polymers emit CL when they undergo oxidative degradation, and it originates from the bimolecular reaction of macroperoxy radicals which
creates an excited carbonyl. |
| first_indexed | 2024-03-06T01:26:39Z |
| format | Article |
| id | oai:ir.uitm.edu.my:13047 |
| institution | Universiti Teknologi MARA |
| language | English |
| last_indexed | 2024-03-06T01:26:39Z |
| publishDate | 2013 |
| publisher | Research Management Institute (RMI) |
| record_format | dspace |
| spelling | oai:ir.uitm.edu.my:130472016-05-30T04:34:12Z https://ir.uitm.edu.my/id/eprint/13047/ Simple modification measurement of photodegradability of polymers by using photo-induced chemiluminescence technique / Siti Farhana Zakaria and Keith R. Millington srj Zakaria, Siti Farhana Millington, Keith R. Oxidation Free radicals (Chemistry) Chemiluminescence Photochemistry Polymers and organic materials that are exposed to sunlight undergo photooxidation, which leads to deterioration oftheir physical properties. To allow adequate performance under outdoor conditions, synthetic polymers require additives such as antioxidants and UV absorbers. A major problem with optimising polymer formulations to maximise their working life span is that accelerated weathering tests are empirical. The conditions differ significantly from real weathering situations, and samples require lengthy irradiation period. Degradation may not be apparent in the early stages of exposure, although this is when products such as hydroperoxides are formed which later cause acceleration ofoxidation. Asimple way ofquantifying the number of free radicals presents in organic materials following exposure to light or heat is by measuring chemiluminescence (CL) emission. Most polymers emit CL when they undergo oxidative degradation, and it originates from the bimolecular reaction of macroperoxy radicals which creates an excited carbonyl. Research Management Institute (RMI) 2013 Article PeerReviewed text en https://ir.uitm.edu.my/id/eprint/13047/1/AJ_SITI%20FARHANA%20ZAKARIA%20SRJ%2013%201.pdf Simple modification measurement of photodegradability of polymers by using photo-induced chemiluminescence technique / Siti Farhana Zakaria and Keith R. Millington. (2013) Scientific Research Journal <https://ir.uitm.edu.my/view/publication/Scientific_Research_Journal/>, 10 (2). pp. 51-61. ISSN 1675-7009 https://srj.uitm.edu.my/ |
| spellingShingle | Oxidation Free radicals (Chemistry) Chemiluminescence Photochemistry Zakaria, Siti Farhana Millington, Keith R. Simple modification measurement of photodegradability of polymers by using photo-induced chemiluminescence technique / Siti Farhana Zakaria and Keith R. Millington |
| title | Simple modification measurement of photodegradability of polymers by using photo-induced chemiluminescence technique / Siti Farhana Zakaria and Keith R. Millington |
| title_full | Simple modification measurement of photodegradability of polymers by using photo-induced chemiluminescence technique / Siti Farhana Zakaria and Keith R. Millington |
| title_fullStr | Simple modification measurement of photodegradability of polymers by using photo-induced chemiluminescence technique / Siti Farhana Zakaria and Keith R. Millington |
| title_full_unstemmed | Simple modification measurement of photodegradability of polymers by using photo-induced chemiluminescence technique / Siti Farhana Zakaria and Keith R. Millington |
| title_short | Simple modification measurement of photodegradability of polymers by using photo-induced chemiluminescence technique / Siti Farhana Zakaria and Keith R. Millington |
| title_sort | simple modification measurement of photodegradability of polymers by using photo induced chemiluminescence technique siti farhana zakaria and keith r millington |
| topic | Oxidation Free radicals (Chemistry) Chemiluminescence Photochemistry |
| url | https://ir.uitm.edu.my/id/eprint/13047/1/AJ_SITI%20FARHANA%20ZAKARIA%20SRJ%2013%201.pdf |
| work_keys_str_mv | AT zakariasitifarhana simplemodificationmeasurementofphotodegradabilityofpolymersbyusingphotoinducedchemiluminescencetechniquesitifarhanazakariaandkeithrmillington AT millingtonkeithr simplemodificationmeasurementofphotodegradabilityofpolymersbyusingphotoinducedchemiluminescencetechniquesitifarhanazakariaandkeithrmillington |