中文摘要：

采用以体积拉伸形变为主导的叶片挤出机制备聚丁二酸丁二醇酯（PBS）/木质素可降解复合材料,考察了叶片挤出机加工温度（130-145℃）、加工转速（10-40 r/min）对复合材料停留时间、表观质量、力学性能以及微观形貌的影响.结果表明,复合材料停留时间随着加工温度的提升而逐渐减小,加工转速具有类似变化趋势;复合材料表观质量随加工温度影响不显著,但随加工转速影响剧烈;复合材料力学性能随加工温度变化不明显,而随加工转速影响程度不一;复合材料断面微观形貌在不同的加工温度下有细微变化,而在不同的加工转速下变化明显.以上结果与叶片挤出机的结构和固体输送有关,物料在拉伸流场作用下发生正位移输送和塑性能量耗散,提高了传质效率,在适当加工条件下引起组分间相互作用机制加强.综合考虑产品性能与经济成本,确定叶片挤出机制备PBS/木质素复合材料各段加工温度为115、125、135、125℃,加工转速为20 r/min.

英文摘要：

With a vane extruder,poly（ butylenes succinate） （PBS）/lignin biocomposites were prepared. The effects of vane extruder processing temperature （ 130,135,140,145 ℃ ） and rotating speed （ 10,20,30,40 r/min） on residence time, apparent quality and mechanical properties of composites were investigated, as well as the morphology properties with scanning electron microscope （SEM）. The results showed that the residence time of materials gradually decreased with the rising of rotating speed, as well as the rising of processing temperature ; the apparent quality of composites slightly changed with the rising of processing temperature,but dramatically changed with the rising of rotating speed; the mechanical properties of composites also slightly changed with the rising of processing temperature,but each mechanical property of composites had a different effect of the rising of rotating speed. In addition, the morphology of composites fracture sections slightly changed with different processing temperatures, but significantly changed with processing rotating speed. These results were related to the structural and conveying characteristics of the vane extruder, positive displacement conveying and plastic energy dissipation of materials are generated in elongational flow, which improve the efficiency of mass transfer and strengthen the mechanism of interaction between components of composites. For the performance and economic costs of the PBS/lignin composites,the susgested processing conditions of vane extruder are as follows,the segments temperatures of vane extruder are 115,125,135,125℃ and the rotating speed is 20 r/min.