摘要
PE/PLA共混材料因具有生物降解性而受到广泛关注,但其存在易燃性限制可降解材料在多个领域的应用。通过采取1种催化碳化的策略对PE/PLA共混材料进行阻燃。催化剂采用MgO负载Ni-Mo双金属催化剂(Ni-Mo/MgO),协效剂采用商业化的炭黑。结果表明:在适合的比例下Ni-Mo/MgO和炭黑可有效催化PE/PLA共混材料碳化实现阻燃。当PE/PLA为60∶30,Ni-Mo/MgO和炭黑添加量分别为5%,材料在900℃碳化率可达到50.7%,材料热释放速率峰值(PHRR)、总热释放量(THR)、总烟释放量(TSR)均大幅度下降。CB和Ni-Mo/MgO的加入,使PE/PLA复合材料拉伸强度、断裂强度提高。
PE/PLA blends have attracted wide attention due to their biodegradability, but their flammability limits the application of biodegradable materials in various fields. PE/PLA blends were flame retardant by adopting a strategy of catalytic carbonization. MgO supported Ni-Mo bimetallic catalyst(Ni-Mo/MgO) was used as catalyst, and commercial carbon black was used as synergist. The results show that Ni-Mo/MgO and carbon black can effectively catalyze the carbonization of PE/PLA blend materials to achieve flame retardant at a suitable ratio. When PE/PLA is 60∶ 30, the addition amount of Ni-Mo/MgO and carbon black is 5% respectively, carbonation rate of the material at 900 ℃ can reach50.7%, and peak heat release rate(PHRR), total heat release(THR) and total smoke release(TSR) of the material decreased significantly. The addition of CB and Ni-Mo/MgO increase tensile strength and fracture strength of PE/PLA composites.
作者
赵彦娜
宋荣君
ZHAO Yan-na;SONG Rong-jun(Heilongjiang Key Laboratory of Molecular Design and Preparation of Flame Retarded Materials,College of Chemistry,Chemical Engineering and Resource Utilization,Northeast Forestry University,Harbin 150040,China)
出处
《塑料科技》
CAS
北大核心
2022年第5期34-38,共5页
Plastics Science and Technology
