碳纳米管选择性分布增韧聚乳酸/聚己二酸对苯二甲酸丁二醇酯共混材料  

Selective Localization of Carbon Nanotubes in Poly(lactic acid)/Poly(butylene adipate-co-terephthalate)Blends with Improved Toughness

作　　者：李桂丽 冯巧 陈树芳 尹田欣 何彝昕 谢丹 毛辰静 邵春光[2] 高蓬 Guili Li;Qiao Feng;Shufang Chen;Tianxin Yin;Yixin He;Dan Xie;Chenjing Mao;Chunguang Shao;Peng Gao(School of Materials and Chemical Engineering,Henan University of Urban Construction,Pingdingshan 467036,China;National Engineering Research Center for Advanced Polymer Processing Technology,Zhengzhou University,Zhengzhou 450002,China;Henan Zhongbiao Technology Co.,Ltd.,Zhengzhou 450000,China)

机构地区：[1]河南城建学院材料与化工学院,河南平顶山467036 [2]郑州大学橡塑模具国家工程研究中心,河南郑州450002 [3]河南中标科技有限公司,河南郑州450000

出　　处：《高分子材料科学与工程》2024年第7期63-69,共7页Polymer Materials Science & Engineering

基　　金：教育部产学合作协同育人项目(230907544242551)。

摘　　要：采用碳纳米管(CNTs)来调控聚乳酸(PLA)/聚己二酸对苯二甲酸丁二醇酯(PBAT)共混材料的微结构和宏观性能,探究了CNTs添加量对PLA/PBAT共混物结晶行为、相形貌及热力学性能的影响规律,基于润湿理论量化分析了CNTs选择性分布的原因,探讨了CNTs增韧PLA/PBAT共混材料的内在机制。结果表明,CNTs选择性分布在PBAT中,显著增大了PBAT相的粒径,使共混材料相形貌粗化,暗示CNTs不具备增容作用;提高CNTs的添加量,共混材料拉伸强度略有降低,断裂伸长率大幅提升;CNTs的质量分数为1%时,PLA/PBAT/CNTs试样的断裂伸长率达到最大,与未添加CNTs的PLA/PBAT试样相比提高了258.6%。Carbon nanotubes(CNTs)was used to modify the structure and properties of poly(lactic acid)(PLA)/poly(butyleneadipate-co-terephthalate)(PBAT)blends.The effects of CNTs content on the crystallization behavior,phase morphology,thermal properties and mechanical properties of the PLA/PBAT blends were studied.The reason for the selective localization of CNTs was analyzed carefully based on wetting theory.And the mechanism of CNTs toughening PLA/PBAT blends was investigated.The results show that the selective localization of CNTs in PABT enlarges the size of PBAT particles,indicating that CNTs are not a real compatibilizer of PLA/PBAT blends.The addition of CNTs slightly reduces the tensile strength but greatly increases the elongation at break.When the mass fractioin of CNTs is 1%,the elongation at break of PLA/PBAT/CNTs samples reaches the maximum,which is 258.6%higher than that of PLA/PBAT.

关 键 词：聚乳酸 聚己二酸对苯二甲酸丁二醇酯 碳纳米管 选择性分布 增韧 

分 类 号：TB332[一般工业技术—材料科学与工程]