Abstract:

Blends of thermoplastic polyester elastomer（TPEE）with carboxy nitrile rubber powders（XNBR）were prepared by melt blending and the phase structure，tensile properties and dynamic rheological properties were investigated. Scanning electron microscope（SEM）observation showed that XNBR weight fraction within 5% of the TPEE matrix can be fragmented into nanometer-sized dispersion，and XNBR aggregates can be formed at higher concentration. TPEE can be strengthened and toughened with the addition of a small amount of XNBR. The blends showed a strength improvement with about 13.6%. Measurements of dynamic rheological properties showed that the complex viscosity increased with the addition of XNBR，while the storage modulus and loss modulus remained the same as that of TPEE.

摘要：

采用熔融共混工艺制备了热塑性聚酯弹性体（TPEE）/羧基丁腈胶粉（XNBR）共混物，研究了共混物的相态结构、拉伸性能及动态流变性能。扫描电子显微镜（SEM）观察表明，羧基丁腈胶粉用量不超过5%（质量分数）时能在TPEE基体中分散成纳米尺寸，含量高时则出现团聚现象。少量羧基丁腈胶粉可以实现对TPEE的增强增韧，强度可提高13.6%。动态流变性能测试表明，加有羧基丁腈胶粉的共混体系复数黏度都比纯TPEE有大幅提高；低含量羧基丁腈胶粉的共混体系储能模量和损耗模量同纯TPEE相差不大。