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用溶液共混法制备了聚丁二酸丁二酯(PBS)/纳米二氧化硅(nano-SiO2)复合材料,并通过DSC、XRD、TEM和DMTA对其结晶、微观结构和动态力学性能进行了研究.DSC与XRD结果表明,在PBS中加入纳米SiO2,提高了PBS的结晶温度,并随着nano-SiO2含量的增加呈正相相关性,从纯PBS的67.7℃提高到含5%nano-SiO2时的73.3℃;在空气淬火条件下,提高了复合材料中PBS的结晶度,在nano-SiO2含量为2%时达到42.4%;TEM照片表明SiO2与基体PBS的界面模糊,表明二者之间具有一定的相互作用;这种相互作用和复合材料结晶性能的变化使PBS/nano-SiO2复合材料的储能模量和损耗因子均高于纯PBS.上述结果表明在PBS中添加适量的nano-SiO2,能显著提高PBS的结晶和动态力学性能.
The polybutylene succinate (PBS) / nano-SiO2 composites were prepared by solution blending method and their crystallites, microstructure and dynamic mechanical properties were characterized by DSC, XRD, TEM and DMTA The results of DSC and XRD showed that the addition of nano-SiO2 in PBS increased the crystallization temperature of PBS and was positively correlated with the increase of nano-SiO2 content from 67.7 ℃ in pure PBS to 5% nano- SiO2 was 73.3 ℃; under the condition of air quenching, the crystallinity of PBS in the composites was increased, reaching 42.4% when the content of nano-SiO2 was 2%; TEM images showed that the interface between SiO2 and matrix PBS was fuzzy, The interactions and the changes of the crystalline properties of the composites made the storage modulus and the loss factor of the PBS / nano-SiO2 composites higher than that of the pure PBS.The above results show that the appropriate amount of nano -SiO2, can significantly improve the crystallization and dynamic mechanical properties of PBS.