School of Chemical Engineering, Changchun University of Technology, Changchun 130012, PR China; Key Laboratory of Bionic Engineering (Ministry of Education), Jilin University, Changchun 130022, PR China.
School of Chemical Engineering, Changchun University of Technology, Changchun 130012, PR China.
Carbohydr Polym. 2019 Jun 1;213:257-265. doi: 10.1016/j.carbpol.2019.02.088. Epub 2019 Feb 26.
In this paper, a mono-component, cellulose-based and intumescent halogen-free flame retardant (HECPM) was prepared by introducing phosphate groups and melamine groups onto the structure of cellulose. And the chemical structure and surface morphology of HECPM was confirmed by FTIR, EDS and SEM, respectively. The thermal degradation tests demonstrate HECPM possesses great expansion property during the inducement of heat and the char residue of HECPM is higher than 43% at 600 °C. Moreover, the synergistic effect of HECPM and EG in flame-retarding polypropylene (PP) was also verified. When 30% HECPM/EG in ratio of 1/3 were introduced into PP, the LOI value reaches 31.5% and it can obtain UL-94 V-0 rating. The conjunct action of HECPM and EG in promoting the char-forming process was also achieved in comparison with the calculated and experimental TGA curves. Along with the investigation on the residue, a potential condensed-phase flame retardant mechanism was primarily proposed.
本文通过在纤维素结构上引入磷酸基团和三聚氰胺基团，制备了一种单一组分、纤维素基、膨胀型无卤阻燃剂（HECPM）。分别通过 FTIR、EDS 和 SEM 对 HECPM 的化学结构和表面形貌进行了确认。热降解测试表明，HECPM 在受热诱导时具有很好的膨胀性能，在 600°C 时的炭残留物高于 43%。此外，还验证了 HECPM 和 EG 在阻燃聚丙烯（PP）中的协同效应。当以 1/3 的比例将 30%的 HECPM/EG 引入到 PP 中时，LOI 值达到 31.5%，并可获得 UL-94 V-0 等级。与计算和实验的 TGA 曲线相比，还实现了 HECPM 和 EG 在促进成炭过程中的协同作用。通过对残留物的研究，初步提出了一种潜在的凝聚相阻燃机理。
