期刊
JOURNAL OF INDUSTRIAL TEXTILES
卷 46, 期 3, 页码 914-928出版社
SAGE PUBLICATIONS INC
DOI: 10.1177/1528083715606105
关键词
Poly(lactic acid); flame retardancy; flammability; flame retardant; calorimetry; phosphorus
资金
- Jiangsu Provincial Natural Science Foundation of China [BK2012197]
- Joint Innovation Fund of Jiangsu Province of China [BY2014059-04]
- Suzhou Science and Technology Support Program [SS201422]
- Priority Academic Program Development (PAPD) of Jiangsu Higher Education Institutions
A cyclic phosphonate ester flame retardant was applied to improve the flame retardancy of poly(lactic acid) (PLA) nonwoven fabric by a pad-dry-cure technique. The effects of curing temperature and flame retardant dosage on the flammability of PLA fabric were analyzed. The burning behavior, thermal stability and flame-retardant mechanism of the flame-retardant PLA fabric were investigated by limiting oxygen index (LOI), vertical burning test, microscale combustion calorimetry (MCC), thermogravimetric (TG) analysis and scanning electron microscopy (SEM) with energy dispersive spectrum (EDS). The treated PLA fabric exhibited good flame retardancy, and its LOI was about 35%, whereas this value was 26.3% for the untreated fabric. No obvious difference of the MCC test results between the untreated and treated fabrics was found. The results from TG analyses indicated the formation of a very small amount of char during the thermal degradation process of the treated PLA fabric. The SEM-EDS analysis showed an obvious decrease in the phosphorus content of the flame retardant fabric after burning. These indicate that the gas-phase flame-retardant mechanism during combustion is dominant, and results in the good flame retardancy of the treated fabric in the presence of a very small amount of char residue.
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