摘要
硅灰石填充 PP 经三螺杆动态塑化混炼加工后,将粒料制成试样并进行力学性能测试和扫描电镜断面分析。实验研究了不同振动参数对 PP/硅灰石力学性能和断面微观结构的影响。结果表明,与稳态相比,动态(引入振动)加工条件下试样的冲击强度、拉伸强度、断裂伸长率和弯曲强度均有显著提高,最大分别提高了10.7%、10.2%、51.3%和18.6%;对在振动频率 f=10 Hz、振幅 A=105 μm动态塑化混炼加工条件下试样的扫描电镜断面分析表明,PP/硅灰石材料中硅灰石的粒径变小并趋于一致,分散分布均一,与 PP 结合界面得到加强。
Wollastonite filled PP was studied in this work. The mechanical properties and SEM mor- phology of PP/Wollastonite blends were determined after being extruded by a dynamic tri-screw extruder. The effect of different dynamic parameters on the mechanical properties and the section microstructure were investigated. Compared with those based on steady condition, impact strength, tension strength, elongation ratio at break, and flex strength of the samples improved remarkably under dynamic working condition,the maximum increments being 10.7 %, 10.2 % ,51.3 %, and 18.6 %, respectively. Under the dynamic condition of f= 10 Hz and A = 105 μm, the dispersion of wollastonite was improved, the particle size became smaller and more uniform, as revealed bv SEM analysis.
出处
《中国塑料》
CAS
CSCD
北大核心
2008年第11期47-51,共5页
China Plastics
基金
国家863项目(2002AA333100)
关键词
三螺杆挤出机
动态塑化混炼
硅灰石
聚丙烯
力学性能
tri-screw extruder
dynamic plasticization
wollastonite
polypropylene
mechanical property
