PHBV/纳米CaCO_3共混物的热性能和力学性能

通过熔融共混的方法制备出了β-羟基丁酸酯和β-羟基戊酸酯共聚物(PHBV)/纳米CaCO3共混物,采用DSC,TGA,DMA,拉力机和旋转流变仪等仪器对所制备的共混物的热性能和力学性能进行了研究.结果表明,气氛对PHBV的热稳定性没有影响,纳米CaCO3的加入对PHBV的玻璃化转变温度和热分解温度基本不产生影响.此外,当加入的纳米CaCO3质量分数为5%时,共混物的增韧效果比较好.

Thermal and Mechanical Properties of PHBV/CaCO3 Blends

PHBV/CaCO3 blends were prepared by way of banburying,and the thermal and mechanical properties of the blends thus prepared were investigated by means of differential scanning calorimetry(DSC),thermogravimetric analysis(TGA),dynamic mechanical analysis(DMA),tensile tester and rotary rheometer.The results showed that the atmosphere does not affect the thermal stability of PHBV blends,and a certain amount of CaCO3 nanoparticles as additive hardly affect the glass transition temperature and thermal decomposition temperature.Moreover,the blends have better toughening effect when the content of CaCO3 is 5%.