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利用乙烯基硅烷偶联剂(KH570)对硅酸钙表面进行改性。然后,将其与聚丁二酸丁二酯(PBS)熔融共混,采用差示热扫描量热法和旋转流变仪研究了不同硅酸钙含量和种类对PBS热性能和流变性能的影响。最后,利用超临界二氧化碳作为物理发泡剂对该复合材料进行釜压发泡,并用扫描电子显微镜观察其微观形貌,采用密度计测试其发泡倍率。结果表明:与未改性硅酸钙填充的PBS相比,改性硅酸钙填充PBS的结晶温度和储能模量显著提高,并且随着硅酸钙含量的增加,PBS的结晶温度、复数黏度、储能模量逐渐提高。复合材料泡沫结构呈闭孔且分布均匀。
The surface of calcium silicate was modified with vinyl silane coupling agent (KH570). Then, it was melt-blended with polybutylene succinate (PBS). Differential thermal scanning calorimetry (DSC) and rotational rheometer were used to investigate the effects of different calcium silicate contents and types on the thermal and rheological properties of PBS influences. Finally, the composite foam was foamed by using supercritical carbon dioxide as a physical foaming agent. The microstructure of the composite was observed by scanning electron microscopy. The foaming magnification was measured with a densitometer. The results showed that the crystallization temperature and storage modulus of modified calcium silicate-filled PBS significantly increased as compared with unmodified calcium silicate-filled PBS. With the increase of calcium silicate content, the crystallization temperature of PBS, complex number Viscosity, storage modulus gradually increased. The composite foam structure is obtuse and evenly distributed.