Thermal Degradation and Stability of Accelerated-curing Phenol-formaldehyde Resin
In order to study the thermal stability of accelerated-curing PF resin, the curing behavior of fresh PF resin was investigated in the presence of single accelerator of methylolurea derivatives (MMU), magnesium hydrate (Mg(OH)2), 25% aqueous solution of sodium carbonate (Na2CO3), and propylene carbon...
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| Format: | Article |
| Language: | English |
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North Carolina State University
2014-05-01
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| Series: | BioResources |
| Subjects: | |
| Online Access: | http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_09_3_4063_Chen_Thermal_Degradation_Stability |
| _version_ | 1818994439418281984 |
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| author | Yuzhu Chen Dongbin Fan Tefu Qin Fuxiang Chu |
| author_facet | Yuzhu Chen Dongbin Fan Tefu Qin Fuxiang Chu |
| author_sort | Yuzhu Chen |
| collection | DOAJ |
| description | In order to study the thermal stability of accelerated-curing PF resin, the curing behavior of fresh PF resin was investigated in the presence of single accelerator of methylolurea derivatives (MMU), magnesium hydrate (Mg(OH)2), 25% aqueous solution of sodium carbonate (Na2CO3), and propylene carbonate (PC). Also their optimum combination was added in fresh PF resin. The thermal stability of cured phenol-formaldehyde (PF) resins was studied using thermogravimetric analysis TG/DTA in air with heating rates of 5, 10, 15, and 20 °C min-1. Thermal degradation kinetics were investigated using the Kissinger and Flynn-Wall-Ozawa methods. The results show that these accelerators can promote fresh PF resin fast curing, and the degradation of accelerated-curing cured PF resin can be divided into three stages. Single accelerator MMU, Mg(OH)2, and Na2CO3 can promote fresh PF curing at low temperatures in the first stage, while the structure of PF resin which was added with MMU and PC was more rigid, according to thermal degradation kinetics. A novel fast curing agent which is compound with MMU+Na2CO3 for PF resin is proposed; not only can it maintain the advantage of fast curing of the single accelerator Na2CO3, but it also improves the thermal stability of PF resin. |
| first_indexed | 2024-12-20T20:57:58Z |
| format | Article |
| id | doaj.art-75de21ef40c34ef58ff3f4a90b318850 |
| institution | Directory Open Access Journal |
| issn | 1930-2126 1930-2126 |
| language | English |
| last_indexed | 2024-12-20T20:57:58Z |
| publishDate | 2014-05-01 |
| publisher | North Carolina State University |
| record_format | Article |
| series | BioResources |
| spelling | doaj.art-75de21ef40c34ef58ff3f4a90b3188502022-12-21T19:26:47ZengNorth Carolina State UniversityBioResources1930-21261930-21262014-05-01934063407510.15376/biores.9.3.4063-4075Thermal Degradation and Stability of Accelerated-curing Phenol-formaldehyde ResinYuzhu Chen0Dongbin Fan1Tefu Qin2Fuxiang Chu3Research Institute of Wood Industry, Chinese Academy of ForestryResearch Institute of Wood Industry, Chinese Academy of Forestry, Beijing, 100091, P.R. ChinaResearch Institute of Wood Industry, Chinese Academy of Forestry, Beijing, 100091, P.R. ChinaResearch Institute of Wood Industry, Chinese Academy of Forestry, Beijing, 100091, P.R. ChinaIn order to study the thermal stability of accelerated-curing PF resin, the curing behavior of fresh PF resin was investigated in the presence of single accelerator of methylolurea derivatives (MMU), magnesium hydrate (Mg(OH)2), 25% aqueous solution of sodium carbonate (Na2CO3), and propylene carbonate (PC). Also their optimum combination was added in fresh PF resin. The thermal stability of cured phenol-formaldehyde (PF) resins was studied using thermogravimetric analysis TG/DTA in air with heating rates of 5, 10, 15, and 20 °C min-1. Thermal degradation kinetics were investigated using the Kissinger and Flynn-Wall-Ozawa methods. The results show that these accelerators can promote fresh PF resin fast curing, and the degradation of accelerated-curing cured PF resin can be divided into three stages. Single accelerator MMU, Mg(OH)2, and Na2CO3 can promote fresh PF curing at low temperatures in the first stage, while the structure of PF resin which was added with MMU and PC was more rigid, according to thermal degradation kinetics. A novel fast curing agent which is compound with MMU+Na2CO3 for PF resin is proposed; not only can it maintain the advantage of fast curing of the single accelerator Na2CO3, but it also improves the thermal stability of PF resin.http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_09_3_4063_Chen_Thermal_Degradation_StabilityAcceleratorsKineticsPhenol-formaldehyde resinThermal degradation |
| spellingShingle | Yuzhu Chen Dongbin Fan Tefu Qin Fuxiang Chu Thermal Degradation and Stability of Accelerated-curing Phenol-formaldehyde Resin BioResources Accelerators Kinetics Phenol-formaldehyde resin Thermal degradation |
| title | Thermal Degradation and Stability of Accelerated-curing Phenol-formaldehyde Resin |
| title_full | Thermal Degradation and Stability of Accelerated-curing Phenol-formaldehyde Resin |
| title_fullStr | Thermal Degradation and Stability of Accelerated-curing Phenol-formaldehyde Resin |
| title_full_unstemmed | Thermal Degradation and Stability of Accelerated-curing Phenol-formaldehyde Resin |
| title_short | Thermal Degradation and Stability of Accelerated-curing Phenol-formaldehyde Resin |
| title_sort | thermal degradation and stability of accelerated curing phenol formaldehyde resin |
| topic | Accelerators Kinetics Phenol-formaldehyde resin Thermal degradation |
| url | http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_09_3_4063_Chen_Thermal_Degradation_Stability |
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