P. Y. Wen, X. F. Wang, X. M. Feng, K. Q. Zhou, B. Yu, Q. J. Zhang, Q. L. Tai, L. Song, Y. Hu and R. K. K. Yuen (2015) A novel UV-curing flame retardant film with significantly intumescent effect. Journal/Polymer Degradation And Stability 119 288-294. [In English]
Web link: http://dx.doi.org/10.1016/j.polymdegradstab.2015.05.013
Keywords: UV curing film, Intumescent flame retardance, Thermal stability, THERMAL-DEGRADATION, EPOXY ACRYLATE, FIRE RETARDANCY, COATINGS, BEHAVIOR, MECHANISM, PHOSPHATE, METHACRYLATE, POLYMERS, BLENDS
Abstract: High flammability has always been a major challenge hindering in application of most conventional UV-curable resins. Herein, several intumescent flame-retardant (FR) films characterized with crosslinked network structure were successfully prepared via the combination of tri(acryloyloxyethyl) phosphate (TAEP) with melamine-based acrylate resin (MAAR) by UV-cured method. As compared with sole TAEP- or MAAR-containing films, the mixed films containing TAEP and MAAR exhibited improved flame retardant property. The characterizations of their flammability and char morphologies indicated that the PN-2 with 2/1 mass ratio of TAEP to MAAR had the relatively better flame retardance and could form the intumescent char layer with many thin-walled large bubbles under the compact surface layer. Furthermore, the evolved products for PN-2 with 2/1 mass ratio of TAEP to MAAR during the thermal degradation exhibited much less release than neat TAEP- or MAAR-containing coatings, which implied the increase of the pyrolysis products inside the char layer and thus leaded to the expansion of the intumescent FR films. These results suggest the UV-curing intumescent FR films containing TAEP and MAAR with appropriate ratio possess great flame retardant efficiency that in favor of further application on a substrate, such as fabrics, wood, and plastics. (C) 2015 Elsevier Ltd. All rights reserved.

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