Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5203548 | Polymer Degradation and Stability | 2010 | 8 Pages |
Abstract
A novel hyperbranched polyamine charring agent (HPCA), a derivative of triazines, was synthesized and well characterized by 1H NMR and FTIR. HPCA and ammonium polyphosphate (APP) were added into polylactide (PLA) resin as an intumescent flame retardant (IFR) system to impart flame retardancy and dripping resistance to PLA. The flammability and thermal stability of IFR-PLA composites were investigated by limiting oxygen index (LOI), UL-94 vertical burning, cone calorimetry and thermogravometric analysis (TGA) tests. The results showed that the IFR system had both excellent flame retardant and anti-dripping abilities for PLA. The TGA curves suggested that HPCA has good ability of char formation and when combined with APP, would induce synergistic effect which could be clearly observed. This effect greatly promoted the char formation of IFR-PLA composites, hence improved the flame retardant property. Additionally, the structure and morphology of char residues were studied by XPS, FTIR and SEM.
Related Topics
Physical Sciences and Engineering
Chemistry
Organic Chemistry
Authors
Chen-Hao Ke, Juan Li, Ke-Yi Fang, Qi-Liang Zhu, Jin Zhu, Qing Yan, Yu-Zhong Wang,