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Flame retardancy of water‐based intumescent coatings with etherified melamine–formaldehyde and polyvinyl acetate copolymer hybrid resin
Author(s) -
Chuang ChihShen,
Wu ChiehYing,
Wu KuangChong,
Sheen HornJiunn
Publication year - 2020
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.49279
Subject(s) - intumescent , materials science , char , cone calorimeter , melamine , fire retardant , melamine resin , polyvinyl chloride , polyvinyl acetate , composite material , copolymer , fourier transform infrared spectroscopy , formaldehyde , polymer chemistry , coating , chemical engineering , polymer , organic chemistry , chemistry , pyrolysis , engineering
This study investigated etherified melamine–formaldehyde (MF) and polyvinyl acetate copolymer hybrid resins with different intumescent formulations to improve the flame retardancy of plywood. The CO and CO 2 emissions of intumescent coatings were also investigated. The miscibility of two resins is indicated by a single cure peak. Intumescence with a hybrid resin demonstrated better flame retardancy relative to that with a pure etherified MF resin. The results of scanning electron microscopy and a cone calorimeter test indicated that a lower binder resin (BR) content enhances fire retardancy and forms an ideal char. Furthermore, an evaluation of total heat release in addition to CO and CO 2 emissions (for 300 s) revealed that the intumescent coating had the same flame retardancy when the BR content was increased by 40%. The survival duration of the chemical structures of the phosphocarbonaceous chars was verified using Fourier‐transform infrared spectroscopy and solid‐state phosphorus‐31 nuclear magnetic resonance analyses.