Abstract

Herein, benefiting from effective energy-dissipation mechanism, the high-performance thermoplastic elastomers (ZASM/SEBS composites) with excellent mechanical strength-toughness combination were prepared by blending 3-Amino-1,2,4-triazole (ATA), maleic anhydride grafted styrene-ethylene/butadiene-styrene triblock copolymer (SEBS-g-MA), zinc acetate and styrene-ethylene/butadiene-styrene triblock copolymer (SEBS) successively. The Zn²⁺-carboxyl coordination and hydrogen bonding dual-dynamic network of composites was proved by Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy. The mechanical performance of ZASM/SEBS composites was investigated by tensile test. With the decreasing mass ratio of ZASM in ZASM/SEBS composites, the tensile strength and elongation at break increased firstly and then decreased. When the mass ratio of ZASM in composites was 30%, the tensile strength reached 32.1 MPa along with the elongation at break of 1383%, attaining the best mechanical strength-toughness combination. It is demonstrated that the ZASM/SEBS composites could be a promising substitute for traditional vulcanized rubber.

摘要

在此，受益于有效的能量耗散机制，通过共混3-氨基-1,2,4-三唑（ATA）、马来酸酐制备了具有优异机械强度-韧性组合的高性能热塑性弹性体（ZASM/SEBS复合材料）接枝苯乙烯-乙烯/丁二烯-苯乙烯三嵌段共聚物（SEBS-g-MA）、醋酸锌和苯乙烯-乙烯/丁二烯-苯乙烯三嵌段共聚物（SEBS）。锌²⁺通过傅里叶变换红外光谱和X射线光电子能谱证明了复合材料的羧基配位和氢键双动力网络。通过拉伸试验研究了ZASM/SEBS复合材料的力学性能。随着ZASM/SEBS复合材料中ZASM质量比的降低，拉伸强度和断裂伸长率先升高后降低。当复合材料中ZASM的质量比为30%时，拉伸强度达到32.1 MPa，断裂伸长率为1383%，达到了最佳的机械强度-韧性组合。结果表明，ZASM/SEBS 复合材料可能是传统硫化橡胶的有前途的替代品。