不同稳定剂和单体对PLA稳定性及力学性能的影响  

Effect of Different Stabilizer and Monomer on the Stability and Mechanical Properties of PLA

作　　者：刘太闯[1] 宋修德 姚亮[1] 王艳秋[1] 靳玲[1] 张兆红[1] LIU Taichuang;SONG Xiude;YAO Liang;WANG Yanqiu;JIN Ling;ZHANG Zhaohong(Xuzhou College of Industrial Technology,Xuzhou 221140,Jiangsu Province,China)

机构地区：[1]徐州工业职业技术学院,江苏徐州221140

出　　处：《上海塑料》2022年第6期31-35,共5页Shanghai Plastics

基　　金：徐州市2021年推动科技创新项目(KC21333);徐州市2021年推动科技创新项目(KC21042)。

摘　　要：研究了稳定剂(抗氧剂1010、抗氧剂168、光稳定剂944)对聚乳酸(PLA)加工稳定性的影响,以及接枝单体(PEG200DA、丙烯酸丁酯、TMPTA)、增韧剂(SEBS)对PLA力学性能的影响。结果表明:光稳定剂944的加入能有效抑制PLA的降解,当光稳定剂944质量份数为0.3时,PLA试样的熔融指数最低,为18 g/(10 min),比纯PLA的熔融指数降低了51.4%;当PEG200DA质量份数为0.5时,PLA试样的拉伸强度提高到68.2 MPa;SEBS的加入可显著改善PLA的韧性,SEBS质量份数为5时,PLA试样的冲击强度为41 kJ/m^(2),比不加SEBS时提高了141.2%。The effects of stabilizers(antioxidant 1010,antioxidant 168,light stabilizer 944)on the processing stability of poly(lactic acid)(PLA),and the effects of grafting monomers(PEG200DA,butyl acrylate,TMPTA)and toughening agent(SEBS)on the mechanical properties of PLA were studied.The results show that the addition of light stabilizer 944 can effectively inhibit the degradation of PLA.When the mass fraction of light stabilizer 944 is 0.3,the melt index of PLA sample is the lowest,which is 18 g/(10 min),and is 51.4%lower than that of pure PLA.When the mass fraction of PEG200DA is 0.5,the tensile strength of PLA sample increases to 68.2 MPa.The addition of SEBS can significantly improve the toughness of PLA.When the mass fraction of SEBS is 5,the impact strength of PLA sample is 41 kJ/m^(2),which is 141.2%higher than that without SEBS.

关 键 词：聚乳酸 力学性能 熔融指数 韧性 

分 类 号：TQ322.4[化学工程—合成树脂塑料工业]