摘要
利用双螺杆挤出机进行不同组分比的聚乳酸(PLA)/云母(Mica)粒子复合材料熔融共混,通过调节挤出物的牵引速率制备不同的共混粒料,再利用平板硫化机模压成型制备系列基于不同牵引速率的PLA/Mica标准样条。采用扫描电子显微镜(SEM)和透射电子显微镜(TEM)进行Mica粒子分散形态观察,发现高的牵引速率起到了较好地改善Mica粒子分散效果的作用;采用热重分析仪(TG)、动态热机械分析仪(DMA)和维卡温度软化仪(VST)分别进行了复合材料的热稳定性及热变形温度测试,与纯PLA相比,牵引速率0.50 m/s下的PLA/Mica(质量比91/9)复合材料最大热分解温度和热变形温度分别提高了3.5℃和4.4℃。结果表明,与纯PLA的相比,牵引速率0.50m/s下的PLA/Mica(质量比91/9)复合材料最大热分解温度和热变形温度分别提高了3.5℃和4.4℃。
The polylactic acid （PLA）/mica composites with different component ratios were prepared bymelt blending via twin-screw extruder in the condition of different drawing rates. And then, a series ofstandard spline of PLA/mica blends were obtained by press vulcanizer molding. Scanning electron microscope（SEM） and transmission electron microscopy （TEM） were used to observe the dispersion morphology ofmica particles. The results suggest that the high drawing rate playes a better role on the improvement of micaparticles dispersion. Thermogravimetric analyzer （TG） , dynamic thermal mechanical analyzer （DMA） andvicat softening temperature （VST） were used to research the thermal stability and thermal deformationtemperature of the PLA/miea composites. The results show that compared to pure PLA, the maximum thermaldecomposition temperature and thermal deformation temperature of the PLA/mica composites are improved by3.5 ℃ and 4. 4 ℃ when the drawing rate is 0. 50 m/s, respectively.
出处
《塑料工业》
CAS
CSCD
北大核心
2016年第6期82-85,92,共5页
China Plastics Industry
基金
陕西理工学院校级科研基金项目(SLGKY14-14)
陕西省高校科协青年人才托举计划项目(203890022)
关键词
牵引速率
聚乳酸
云母
形态
热性能
Drawing Rate
Polylactic Acid
Mica
Morphology
Thermal Property
