How Do Phosphorus Compounds with Different Valence States Affect the Flame Retardancy of PET?
This work investigated the effect of different valence states of phosphorus-containing compounds on thermal decomposition and flame retardancy of polyethylene terephthalate (PET). Three polyphosphates—PBPP with +3-valence P, PBDP with +5-valence P and PBPDP with both +3/+5-valence P—were synthesized...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-04-01
|
| Series: | Polymers |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-4360/15/8/1917 |
| _version_ | 1797603709405888512 |
|---|---|
| author | Siheng Zhao Bo Xu Hao Shan Qinglei Zhang Xiangdong Wang |
| author_facet | Siheng Zhao Bo Xu Hao Shan Qinglei Zhang Xiangdong Wang |
| author_sort | Siheng Zhao |
| collection | DOAJ |
| description | This work investigated the effect of different valence states of phosphorus-containing compounds on thermal decomposition and flame retardancy of polyethylene terephthalate (PET). Three polyphosphates—PBPP with +3-valence P, PBDP with +5-valence P and PBPDP with both +3/+5-valence P—were synthesized. The combustion behaviors of flame-retardant PET were studied and the structure–property relationships between the phosphorus-based structures with different valence states and flame-retardant properties were further explored. It was found that phosphorus valence states significantly affected the flame-retardant modes of action of polyphosphate in PET. For the phosphorus structures with +3-valence, more phosphorus-containing fragments were released in the gas phase, inhibiting polymer chain decomposition reactions; by contrast, those with +5-valence phosphorus retained more P in the condensed phase, promoting the formation of more P-rich char layers. It is worth noting that the polyphosphate containing both +3/+5-valence phosphorous tended to combine the advantage of phosphorus structures with two valence states and balance the flame-retardant effect in the gas phase and condensed phase. These results contribute to guiding the design of specified phosphorus-based structures of flame-retardant compounds in polymer materials. |
| first_indexed | 2024-03-11T04:35:36Z |
| format | Article |
| id | doaj.art-05d8390285ed4431a07de120e65591ef |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-11T04:35:36Z |
| publishDate | 2023-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-05d8390285ed4431a07de120e65591ef2023-11-17T21:02:24ZengMDPI AGPolymers2073-43602023-04-01158191710.3390/polym15081917How Do Phosphorus Compounds with Different Valence States Affect the Flame Retardancy of PET?Siheng Zhao0Bo Xu1Hao Shan2Qinglei Zhang3Xiangdong Wang4School of Chemistry and Materials Engineering, Beijing Technology and Business University, Beijing 100048, ChinaSchool of Chemistry and Materials Engineering, Beijing Technology and Business University, Beijing 100048, ChinaSchool of Chemistry and Materials Engineering, Beijing Technology and Business University, Beijing 100048, ChinaSchool of Chemistry and Materials Engineering, Beijing Technology and Business University, Beijing 100048, ChinaSchool of Chemistry and Materials Engineering, Beijing Technology and Business University, Beijing 100048, ChinaThis work investigated the effect of different valence states of phosphorus-containing compounds on thermal decomposition and flame retardancy of polyethylene terephthalate (PET). Three polyphosphates—PBPP with +3-valence P, PBDP with +5-valence P and PBPDP with both +3/+5-valence P—were synthesized. The combustion behaviors of flame-retardant PET were studied and the structure–property relationships between the phosphorus-based structures with different valence states and flame-retardant properties were further explored. It was found that phosphorus valence states significantly affected the flame-retardant modes of action of polyphosphate in PET. For the phosphorus structures with +3-valence, more phosphorus-containing fragments were released in the gas phase, inhibiting polymer chain decomposition reactions; by contrast, those with +5-valence phosphorus retained more P in the condensed phase, promoting the formation of more P-rich char layers. It is worth noting that the polyphosphate containing both +3/+5-valence phosphorous tended to combine the advantage of phosphorus structures with two valence states and balance the flame-retardant effect in the gas phase and condensed phase. These results contribute to guiding the design of specified phosphorus-based structures of flame-retardant compounds in polymer materials.https://www.mdpi.com/2073-4360/15/8/1917polyethylene terephthalate (PET)flame retardantvalence statesphosphate |
| spellingShingle | Siheng Zhao Bo Xu Hao Shan Qinglei Zhang Xiangdong Wang How Do Phosphorus Compounds with Different Valence States Affect the Flame Retardancy of PET? Polymers polyethylene terephthalate (PET) flame retardant valence states phosphate |
| title | How Do Phosphorus Compounds with Different Valence States Affect the Flame Retardancy of PET? |
| title_full | How Do Phosphorus Compounds with Different Valence States Affect the Flame Retardancy of PET? |
| title_fullStr | How Do Phosphorus Compounds with Different Valence States Affect the Flame Retardancy of PET? |
| title_full_unstemmed | How Do Phosphorus Compounds with Different Valence States Affect the Flame Retardancy of PET? |
| title_short | How Do Phosphorus Compounds with Different Valence States Affect the Flame Retardancy of PET? |
| title_sort | how do phosphorus compounds with different valence states affect the flame retardancy of pet |
| topic | polyethylene terephthalate (PET) flame retardant valence states phosphate |
| url | https://www.mdpi.com/2073-4360/15/8/1917 |
| work_keys_str_mv | AT sihengzhao howdophosphoruscompoundswithdifferentvalencestatesaffecttheflameretardancyofpet AT boxu howdophosphoruscompoundswithdifferentvalencestatesaffecttheflameretardancyofpet AT haoshan howdophosphoruscompoundswithdifferentvalencestatesaffecttheflameretardancyofpet AT qingleizhang howdophosphoruscompoundswithdifferentvalencestatesaffecttheflameretardancyofpet AT xiangdongwang howdophosphoruscompoundswithdifferentvalencestatesaffecttheflameretardancyofpet |