期刊
THERMOCHIMICA ACTA
卷 679, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.tca.2019.178336
关键词
Poly (lactic acid); Synergistic effect; Nano ZnO; Flame retardant property; Mechanical property
资金
- Young Top-notch Talents Support Project of High-level Teachers in Beijing Municipal Universities in the Period of 13th Five-year Plan [CITTCD201704040]
- National Nature Science Foundations [51503008]
- Beijing Natural Science Foundation Project [2192014]
- Project of the Improved Research Capacity Plan for Postgraduate Students
Nano zinc oxide (nano ZnO) and phosphazene/triazine bi-group flame retardant in situ doping nano zinc oxide (A4-d-ZnO) were used as synergists in intumescent flame retardant poly (lactic acid) (PLA) composites, respectively. The results showed that nano ZnO endowed flame retardant PLA excellent flame retardant properties, such as the higher LOI value, the lower pk-HRR, av-HRR, THR, mass loss rate, TSR and more final mass than A4-d-ZnO. It was because that nano ZnO catalyzed PLA decomposed into low molecular segments, which acted as a char-forming agent. However, it destroyed the mechanical properties seriously. By contrast, although the flame retardant properties of PLA/IFR/A4-d-ZnO was not better than PLA/IFR/nano ZnO, owing to the weakened catalytic effect of A4-d-ZnO coated by the phosphazene/triazine bi-group flame retardant, A4-d-ZnO improved the flame retardant properties, the thermal stability and the mechanical properties at the same time, which was important and necessary for application.
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