A novel polymeric herbicide based on phenoxyacetic acid derivatives
A novel polymeric herbicide based on phenoxyacetic acid derivatives was prepared by the reaction of epoxidised liquid natural rubber (ELNR) with 2,4-dichlorophenoxyacetic acid (2,4-D) or 2-methyl-4-chlorophenoxyacetic acid(MCPA). The liquid natural rubber (LNR) was firstly obtained from the degradat...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Prince of Songkla University
2009-01-01
|
| Series: | Songklanakarin Journal of Science and Technology (SJST) |
| Subjects: | |
| Online Access: | http://www.rdoapp.psu.ac.th/sjst/ejournal/journal/31-1/0125-3395-31-1-57-62.pdf |
| _version_ | 1811232400179462144 |
|---|---|
| author | Wimol Klaichim Pairote Klinpituksa Wae-asae Waehamad |
| author_facet | Wimol Klaichim Pairote Klinpituksa Wae-asae Waehamad |
| author_sort | Wimol Klaichim |
| collection | DOAJ |
| description | A novel polymeric herbicide based on phenoxyacetic acid derivatives was prepared by the reaction of epoxidised liquid natural rubber (ELNR) with 2,4-dichlorophenoxyacetic acid (2,4-D) or 2-methyl-4-chlorophenoxyacetic acid(MCPA). The liquid natural rubber (LNR) was firstly obtained from the degradation of natural rubber latex with tert-butyl hydroperoxide and cobalt acetylacetonate at 65oC for 72 hrs. The epoxidised liquid natural rubber was prepared from thereaction of LNR with formic acid and hydrogen peroxide at 50oC for 6 hrs. The reaction of epoxidised liquid natural rubber with 2,4-D or MCPA using triethylamine as a catalyst in toluene was performed at 70, 80, and 90oC for 6, 9, 12, 18, and 24hrs. The polymeric herbicides obtained were characterized and the grafting percentage of 2,4-D or MCPA onto liquid natural rubber were also determined by FT-IR and 1H-NMR spectroscopy. It was found that the grafting percentage increased with increasing amount of reactants, temperature, and reaction time. The release of 2,4-D and MCPA from polymeric herbicides was investigated in pH 6, 7, and 8 buffers at room temperature. The results show that the slowest release of 2,4-D and MCPA was found to be constant at pH 7 for 14 and 10 days, respectively. |
| first_indexed | 2024-04-12T11:02:34Z |
| format | Article |
| id | doaj.art-a152806475a64a05afbaf2646ae6e705 |
| institution | Directory Open Access Journal |
| issn | 0125-3395 |
| language | English |
| last_indexed | 2024-04-12T11:02:34Z |
| publishDate | 2009-01-01 |
| publisher | Prince of Songkla University |
| record_format | Article |
| series | Songklanakarin Journal of Science and Technology (SJST) |
| spelling | doaj.art-a152806475a64a05afbaf2646ae6e7052022-12-22T03:35:54ZengPrince of Songkla UniversitySongklanakarin Journal of Science and Technology (SJST)0125-33952009-01-013115762A novel polymeric herbicide based on phenoxyacetic acid derivativesWimol KlaichimPairote KlinpituksaWae-asae WaehamadA novel polymeric herbicide based on phenoxyacetic acid derivatives was prepared by the reaction of epoxidised liquid natural rubber (ELNR) with 2,4-dichlorophenoxyacetic acid (2,4-D) or 2-methyl-4-chlorophenoxyacetic acid(MCPA). The liquid natural rubber (LNR) was firstly obtained from the degradation of natural rubber latex with tert-butyl hydroperoxide and cobalt acetylacetonate at 65oC for 72 hrs. The epoxidised liquid natural rubber was prepared from thereaction of LNR with formic acid and hydrogen peroxide at 50oC for 6 hrs. The reaction of epoxidised liquid natural rubber with 2,4-D or MCPA using triethylamine as a catalyst in toluene was performed at 70, 80, and 90oC for 6, 9, 12, 18, and 24hrs. The polymeric herbicides obtained were characterized and the grafting percentage of 2,4-D or MCPA onto liquid natural rubber were also determined by FT-IR and 1H-NMR spectroscopy. It was found that the grafting percentage increased with increasing amount of reactants, temperature, and reaction time. The release of 2,4-D and MCPA from polymeric herbicides was investigated in pH 6, 7, and 8 buffers at room temperature. The results show that the slowest release of 2,4-D and MCPA was found to be constant at pH 7 for 14 and 10 days, respectively.http://www.rdoapp.psu.ac.th/sjst/ejournal/journal/31-1/0125-3395-31-1-57-62.pdfliquid natural rubberepoxidised liquid natural rubberpolymeric herbicide24-dichlorophenoxyacetic acid2-methyl-4-chlorophenoxyacetic acid |
| spellingShingle | Wimol Klaichim Pairote Klinpituksa Wae-asae Waehamad A novel polymeric herbicide based on phenoxyacetic acid derivatives Songklanakarin Journal of Science and Technology (SJST) liquid natural rubber epoxidised liquid natural rubber polymeric herbicide 2 4-dichlorophenoxyacetic acid 2-methyl-4-chlorophenoxyacetic acid |
| title | A novel polymeric herbicide based on phenoxyacetic acid derivatives |
| title_full | A novel polymeric herbicide based on phenoxyacetic acid derivatives |
| title_fullStr | A novel polymeric herbicide based on phenoxyacetic acid derivatives |
| title_full_unstemmed | A novel polymeric herbicide based on phenoxyacetic acid derivatives |
| title_short | A novel polymeric herbicide based on phenoxyacetic acid derivatives |
| title_sort | novel polymeric herbicide based on phenoxyacetic acid derivatives |
| topic | liquid natural rubber epoxidised liquid natural rubber polymeric herbicide 2 4-dichlorophenoxyacetic acid 2-methyl-4-chlorophenoxyacetic acid |
| url | http://www.rdoapp.psu.ac.th/sjst/ejournal/journal/31-1/0125-3395-31-1-57-62.pdf |
| work_keys_str_mv | AT wimolklaichim anovelpolymericherbicidebasedonphenoxyaceticacidderivatives AT pairoteklinpituksa anovelpolymericherbicidebasedonphenoxyaceticacidderivatives AT waeasaewaehamad anovelpolymericherbicidebasedonphenoxyaceticacidderivatives AT wimolklaichim novelpolymericherbicidebasedonphenoxyaceticacidderivatives AT pairoteklinpituksa novelpolymericherbicidebasedonphenoxyaceticacidderivatives AT waeasaewaehamad novelpolymericherbicidebasedonphenoxyaceticacidderivatives |