PBS/杨木粉全降解木塑复合材料的加工流变性能及其应用研究

Analysis of processing rheological property of PBS/poplar wood flour composites and its applications

采用高级毛细管流变仪,分别测定PBS及PBS/杨木粉全降解木塑复合材料的流变性能,研究了不同挤出温度、不同木粉含量对复合材料加工性能的影响。以流变性能测试为参考,改变加工工艺,采用熔融共混法制备了PBS/杨木粉全降解木塑复合材料,并测试其性能。结果表明,随着木粉用量的增加,体系流动性明显下降,可加工的温度范围越来越窄,大致木粉填充量每提高5%,需要升高5℃才能保证粘度变化不大;不同加工工艺对所制备的PBS/杨木粉木塑复合材料性能有较大影响;综合流变性能和力学性能,木粉含量为30%、35%、40%、45%和50%的PBS/杨木粉全降解木塑复合材料的较佳加工温度分别为120、125、125、130和135℃。

The influence of different temperature and contents of poplar wood flour（WF） on the rheological behavior of the composites were researched through measuring the rheological behavior of the poly（butylene succinate）（PBS） and the PBS/WF composites by advanced capillary rheometer.Using rheological properties of composites as a reference,changing processing technology,PBS/WF composites were prepared by melt blending and injection molding,after that,we tested the performance of the samples.The results showed that,with increasing of the amounts of WF,the melt flow properties of the composite had a great decline and the processing temperature range became more and more narrow;different processing technologies had a certain impact on the performance of PBS/WF composites.Take mechanical and rheological properties into consideration,the optimum processing temperature of the PBS/poplar wood flour composites were 120,125,125,130 and 135℃ with 30%,35%,40%,45% and 50% of poplar wood flour,respectively.