金属有机框架填充SEBS弹性体的力学性能

Mechanical properties of SEBS elastomers filled with metal-organic framework

采用金属有机框架材料CuBTC以及不同氨基负载量的NH 2-CuBTC作为填料,将其以不同比例填充到不同牌号的氢化苯乙烯-丁二烯-苯乙烯三嵌段共聚物(SEBS)热塑性弹性体中,对共混膜的力学性能进行研究。结果表明,适量的CuBTC会使SEBS热塑性弹性体的拉伸强度、断裂伸长率、硬度以及储能模量同时提升;其中NH 2-CuBTC在提高SEBS热塑性弹性体的性能方面具有更大的优势。当SEBS牌号为1654时,填充3%(质量分数)CuBTC-N2,拉伸强度由24.6 MPa提升至36.6 MPa,断裂伸长率由643%提升至725%;当SEBS牌号为1901时,填充3%CuBTC-N2,拉伸强度由26.5 MPa提升至32.1 MPa,断裂伸长率由512%提升至561%。

CuBTC,a metal-organic framework material,together with NH 2-CuBTC with different amino loading,were used as fillers to modify different grades of hydrogenated polystyrene-butadiene-styrene triblock copolymer(SEBS)thermoplastic elastomers.Mechanical properties of the blends were studied.The results show that the tensile strength,elongation at break,hardness and energy storage modulus of SEBS thermoplastic elastomer can be improved with appropriate contents of CuBTC.NH 2-CuBTC has greater advantages in improving the performance of SEBS thermoplastic elastomers.When SEBS 1654 was filled with 3%CuBTC-N2,the tensile strength increased from 24.6 MPa to 36.6 MPa by 49%,and the elongation at break increased from 643%to 725%by 13%.When SEBS 1901 was filled with 3%CuBTC-N2,the tensile strength increased from 26.5 MPa to 32.1 MPa by 21%,and the elongation at break increased from 512%to 561%by 10%.