摘要
以PLA为基材,分别添加无卤膨胀阻燃剂FR-1420和TC-100制得复合材料,分析了2种阻燃剂对材料的阻燃性能、热稳定性、热释放速率和耐水性能的影响。结果表明,当FR-1420和TC-100在PLA复合材料中的添加量均达到15%时,极限氧指数从纯PLA的19%分别提高至31%和35%,阻燃等级均达到UL 94 V-0级;由热重测试结果可知,FR-1420和TC-100初始分解温度分别可达到288和246℃;添加FR-1420和TC-100的PLA复合材料的初始分解温度从343℃分别降低至325、320℃,残炭含量与理论值相比,分别提高了4.5%和6.4%;由锥形量热测试结果可知,FR-1420和TC-100均能有效地降低PLA的热释放速率,分别降低了43%和71%;添加FR-1420的PLA复合材料经热水浸泡后,阻燃等级仍保持V-0级,而在添加了TC-100的体系中浸泡后,阻燃等级则降低至无级。
Two PLA flame retardant composite were prepared by adding halogen-free expansion flame retardants FR-1420 and TC-100. The effect of the two flame retardants on the flame retardancy, thermal stability, heat release rate and water resistance of the composite were investigated. The results showed that when the addition amount of FR-1420 and TC-100 in PLA composite reached 15%, the limit oxygen in dex increased from 19% of pure PLA to 31% and 35%, respectively, and the flame retardant grade reached UL 94 V-0. Thermogravimetric analysis test found that the initial decomposition temperatures of FR-1420 and TC-100 were 288 ℃ and 246 ℃, respectively. The initial decomposition temperature of PLA composite with FR-1420 and TC-100 decreased from 343 ℃ to 325 ℃ and 320 ℃, respectively, and the carbon residue contents increased by 4.5% and 6.4% compared with the theoretical value, respectively. The cone calorimetry test showed that FR-1420 and TC-100 could effectively reduce the heat release rate of PLA by 43% and 71%, respectively. The flame retardant grade of PLA composite with FR-1420 still remained V-0 after soaking in hot water, while the flame retardant grade of PLA composite with TC-100 decreased to no rating after soaking.
作者
吕强
LYU Qiang(Chongqing Copolyforce New Materials Co.,Ltd.,China Coal Technology and Engineering Group Chongqing Research Institute,Chongqing 400037,China;Chongqing Engineering Technology Research Center of High Performance Engineering Plastics,Chongqing 400037,China)
出处
《塑料》
CAS
CSCD
北大核心
2022年第4期88-91,97,共5页
Plastics
关键词
PLA
膨胀阻燃
热稳定性
热释放速率
耐水性
PLA
intumescent flame retardant
thermostability
heat release rate
water resistance
