Intumescent fire-retardant acrylic coatings : effects of additive loading ratio and scale of testing
This work explores the importance of varying the ratio of conventional flame-retardant additives and the scale of testing on the thermal and flammability/fire performance of acrylic-based coatings. Ammonium polyphosphate (APP), pentaerythritol (PER), and expandable graphite (EG) are used as intumesc...
| Main Authors: | , , , |
|---|---|
| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2022
|
| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/155333 |
| _version_ | 1826122056110964736 |
|---|---|
| author | Ng, Yan Hao Dasari, Aravind Tan, Kang Hang Qian, Lijun |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Ng, Yan Hao Dasari, Aravind Tan, Kang Hang Qian, Lijun |
| author_sort | Ng, Yan Hao |
| collection | NTU |
| description | This work explores the importance of varying the ratio of conventional flame-retardant additives and the scale of testing on the thermal and flammability/fire performance of acrylic-based coatings. Ammonium polyphosphate (APP), pentaerythritol (PER), and expandable graphite (EG) are used as intumescent additives by varying their ratios as 1:1:3 or 1:3:1 or 3:1:1. APP, PER and EG are used as acid source, carbonising agent and blowing agent, respectively. Despite the different roles of APP, PER, and EG, in all the compositions, the physical mechanism of exfoliation of graphite played an important role in offering the fire protection. With higher loadings of EG, the fire-resistance time was higher. However, there were clear differences in the protection extent when tested in a furnace under one-dimensional heat transfer conditions (bench-scale) as opposed to three-dimensional large-scale testing. Parameters that are not intrinsic to the coating system like char cohesion, cracking, delamination from the substrate, rapid and non-directional expansion, and even higher heat fluxes experienced by the edges of the I steel section affect the fire performance. |
| first_indexed | 2024-10-01T05:42:14Z |
| format | Journal Article |
| id | ntu-10356/155333 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:42:14Z |
| publishDate | 2022 |
| record_format | dspace |
| spelling | ntu-10356/1553332022-02-23T07:41:59Z Intumescent fire-retardant acrylic coatings : effects of additive loading ratio and scale of testing Ng, Yan Hao Dasari, Aravind Tan, Kang Hang Qian, Lijun School of Civil and Environmental Engineering School of Materials Science and Engineering Engineering::Materials Loading Ratio Scale of Testing This work explores the importance of varying the ratio of conventional flame-retardant additives and the scale of testing on the thermal and flammability/fire performance of acrylic-based coatings. Ammonium polyphosphate (APP), pentaerythritol (PER), and expandable graphite (EG) are used as intumescent additives by varying their ratios as 1:1:3 or 1:3:1 or 3:1:1. APP, PER and EG are used as acid source, carbonising agent and blowing agent, respectively. Despite the different roles of APP, PER, and EG, in all the compositions, the physical mechanism of exfoliation of graphite played an important role in offering the fire protection. With higher loadings of EG, the fire-resistance time was higher. However, there were clear differences in the protection extent when tested in a furnace under one-dimensional heat transfer conditions (bench-scale) as opposed to three-dimensional large-scale testing. Parameters that are not intrinsic to the coating system like char cohesion, cracking, delamination from the substrate, rapid and non-directional expansion, and even higher heat fluxes experienced by the edges of the I steel section affect the fire performance. Ministry of National Development (MND) Nanyang Technological University National Research Foundation (NRF) This material is based on research work supported by the Singapore Ministry of National Development and National Research Foundationunder L2 NIC Award No. L2NICCFP1-2013-4 and JTC through NTU-JTC I3C (RCAs 16/277 and 17/365). 2022-02-23T07:41:59Z 2022-02-23T07:41:59Z 2021 Journal Article Ng, Y. H., Dasari, A., Tan, K. H. & Qian, L. (2021). Intumescent fire-retardant acrylic coatings : effects of additive loading ratio and scale of testing. Progress in Organic Coatings, 150, 105985-. https://dx.doi.org/10.1016/j.porgcoat.2020.105985 0300-9440 https://hdl.handle.net/10356/155333 10.1016/j.porgcoat.2020.105985 2-s2.0-85093922047 150 105985 en L2NICCFP1-2013-4 NTU-JTC I3C (RCAs 16/277 and 17/365) Progress in Organic Coatings © 2020 Elsevier B.V. All rights reserved. |
| spellingShingle | Engineering::Materials Loading Ratio Scale of Testing Ng, Yan Hao Dasari, Aravind Tan, Kang Hang Qian, Lijun Intumescent fire-retardant acrylic coatings : effects of additive loading ratio and scale of testing |
| title | Intumescent fire-retardant acrylic coatings : effects of additive loading ratio and scale of testing |
| title_full | Intumescent fire-retardant acrylic coatings : effects of additive loading ratio and scale of testing |
| title_fullStr | Intumescent fire-retardant acrylic coatings : effects of additive loading ratio and scale of testing |
| title_full_unstemmed | Intumescent fire-retardant acrylic coatings : effects of additive loading ratio and scale of testing |
| title_short | Intumescent fire-retardant acrylic coatings : effects of additive loading ratio and scale of testing |
| title_sort | intumescent fire retardant acrylic coatings effects of additive loading ratio and scale of testing |
| topic | Engineering::Materials Loading Ratio Scale of Testing |
| url | https://hdl.handle.net/10356/155333 |
| work_keys_str_mv | AT ngyanhao intumescentfireretardantacryliccoatingseffectsofadditiveloadingratioandscaleoftesting AT dasariaravind intumescentfireretardantacryliccoatingseffectsofadditiveloadingratioandscaleoftesting AT tankanghang intumescentfireretardantacryliccoatingseffectsofadditiveloadingratioandscaleoftesting AT qianlijun intumescentfireretardantacryliccoatingseffectsofadditiveloadingratioandscaleoftesting |