中国塑料 ›› 2019, Vol. 33 ›› Issue (3): 68-73,86.DOI: 10.19491/j.issn.1001-9278.2019.03.013

• 加工与应用 • 上一篇    下一篇

加工方式对纳米碳酸钙母料的制备及其聚乳酸复合材料性能的影响

童鹏程1,2,杨松伟1,2,钱庆荣1,2,陈庆华1,2,谢一督1,2,肖荔人1,2*   

  1. 1. 福建师范大学化学与材料学院
    2. 聚合物资源绿色循环利用教育部工程研究中心
  • 收稿日期:2018-11-14 修回日期:2018-11-27 出版日期:2019-03-26 发布日期:2019-04-26
  • 基金资助:
    清远市科技计划项目(2017D003);省科技厅项目(2018Y4002)

Preparation of Nanometer Calcium Carbonate Masterbatch with Different Processing Methods and Its Effect on Structure and Properties of Polylactic Acid Compounds

  • Received:2018-11-14 Revised:2018-11-27 Online:2019-03-26 Published:2019-04-26

摘要: 采用母料法即通过连续混炼机和双螺杆挤出机分别制备了纳米碳酸钙(nano-CaCO3)母料,后将母料按照一定配比添加到聚乳酸(PLA)树脂中进行注塑。通过热重分析仪、扫描电子显微镜和旋转流变仪等对复合材料进行了分析表征,探讨了母料法加工工艺对nano-CaCO3在PLA树脂中分散的影响。结果表明,连续混炼机制备的母料更有利于nano-CaCO3在PLA基体中分散,降低复合材料复数黏度、提高结晶度;同时当添加母料含量相同时,连续混炼母料对复合材料拉伸强度“损失”程度更低,对缺口冲击强度“补强”程度更高。

Abstract: Nano-CaCO3 masterbatch was prepared by using continuous mixer and twin-screw extruder and then were added to polylactic acid (PLA) for injection molding. The effect of processing methods of the masterbatch on the dispersion of Nano-CaCO3 in the PLA matrix was investigated by thermogravimetric analysis, scanning electron microscopy and rotational rheometer. The results indicated that the masterbatch prepared by a continuous mixing method was more advantageous to the dispersion of Nano-CaCO3 in the PLA matrix, which could reduce the complex viscosity of the compounds and increase their crystallinity. At the same amount of masterbatch, the compounds obtained a less decrease in tensile strength but a more significant reinforement effect when using the masterbatch prepared by a continuous mixing method.