电气石改性聚乳酸切片的制备及分析

Preparation and Analysis of Polylactic Acid Resin Containing Tourmaline

以聚乳酸母粒为原料,通过添加不同含量的电气石制备聚乳酸改性切片,利用SEM、DSC和毛细管流变仪分别对其表观形貌、热学性能和熔体的流动性能等进行研究。结果表明:改性切片中电气石颗粒的分散较为均匀;结晶度从27%提高到36%,熔点基本不变;随着温度的升高,熔体的表观粘度降低,非牛顿指数增大,并且在同一温度下,流体的表观粘度随着电气石含量的增加呈现先减小后增大的趋势。

A modified polylactic acid resin is made by adding different percentage tourmaline prepared, and the surface morphology, thermal properties, rheological behavior are tested by SEM, DSC, and Capil- lary Rheometer, respectively. The results show that the tourmaline exhibite an even distribution in the modified resin. The crystallinity of modified resin raises from 27% to 36%, and the melting point remain unchanged. With the rising of temperature, the apparent viscosity decreases and the non-Newtonian index increases. Besides, at the same temperature, the percentage of tourmaline increases, the apparent viscosity of the fluid decreases firstly and then increases with the increases of the tourmaline content.