摘要
采用熔融共混技术,将二乙基次膦酸铝(ADP)引入聚乳酸(PLA)中,制备了一系列阻燃聚乳酸复合材料(FR-PLA)。在此基础上,采用热重分析、极限氧指数、UL 94垂直燃烧、微型量热测试研究了二乙基次膦酸铝对阻燃聚乳酸复合材料热稳定性、阻燃性能以及燃烧性能的影响。结果表明,ADP可以有效提高复合材料的阻燃性能,30%(质量分数,下同)的ADP使得PLA/ADP30通过UL 94 V-0级别,极限氧指数达到31.6%(体积分数,下同); ADP使得阻燃PLA复合材料的初始分解温度降低,但明显提高复合材料的成炭性; ADP使得复合材料的热释放速率峰值明显下降,PLA/ADP30热释放速率峰值为290 W/g,相对于PLA下降37.1%,明显降低复合材料的火灾危险性。
Aluminum diethylphosphinate (ADP) was introduced into polylactide (PLA) to prepare a series of flame-retardant PLA composites (FR-PLA) by a melt-blending method. The effect of ADP on the thermal stability, flame retardancy and combustion property of FR-PLA were investigated by thermogravimetric analysis (TGA), limiting oxygen index (LOI), vertical burning experiment and microscale combustion calorimetry (MCC). The flame-retardant test results indicated that the addition of ADP effectively enhanced the flame retardancy of FR-PLA, and a UL 94 V0 classification and an LOI of 31.6 vol % were achieved when 30 wt % of ADP was added into PLA. TGA results revealed that the incorporation of ADP reduced the degradation temperature of FR-PLA but improved their char yields. MCC analysis showed that the addition of ADP reduced the peak heat release rate (PHRR) of FR-PLA significantly. The FR-PLA containing 30 wt % of ADP presented a PHRR value of 290 W/g, which decreased by 37.1 % compared to pure PLA. This result implied a significant decrease in the fire hazard of FR-PLA.
作者
唐刚
彭中朝
宋强
彭建文
李端生
黄若森
TANG Gang;PENG Zhongchao;SONG Qiang;PENG Jianwen;LI Duansheng;HUANG Ruosen(ASAP Technology (Jiangxi) Co, Ltd,Ji'an 330000, China;State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230026, China)
出处
《中国塑料》
CAS
CSCD
北大核心
2019年第1期24-28,共5页
China Plastics
基金
中国博士后科学基金资助项目(2017M610399)
关键词
聚乳酸
二乙基次膦酸铝
复合材料
阻燃
热稳定性
polylactide
aluminum diethylphosphinate
composite
flame retardant
thermal stability
