摘要
以回收聚乙烯(rPE)和聚酰胺6(PA6)为原料,分别通过传统双螺杆挤出机和新型偏心转子挤出机制备了共混物,并对该材料的力学性能、热性能、动态热机械行为及微观形貌进行了研究。结果表明,随着PA6的加入,两种设备制备的共混物的弹性模量均有显著提升,同时断裂伸长率急剧下降;双螺杆挤出机制备试样的拉伸强度随PA6加入缓慢降低,而偏心转子试样则呈现先下降后上升的趋势;两种加工设备对结晶及熔融行为的影响较小;从微观形貌上分析,偏心转子挤出机制备的样品具有更好的相容性,玻璃化转变温度的差值也从侧面说明了这一现象;偏心转子对不相容的共混体系具有强制增容的效果。
The blends of recycled polyethylene(rPE)and polyamide 6(PA6)were prepared separately using a traditional twin‐screw extruder and a novel eccentric rotor extruder.Their mechanical properties,thermal properties,dynamic ther‐momechanical behavior and microstructure were investigated.The results indicated that the young's modulus of the blends prepared with these two types of equipment increased significantly in the presence of PA6,but their elongation at break decreased sharply.The tensile strength of the blends prepared with the twin‐screw extruder decreased slowly with an increase in the weight fraction of PA6,whereas the blends prepared with the eccentric rotor showed a decrease at first and then an increase in tensile strength.The two types of processing equipments had little effect on the crystallization and melting behaviors of the blends.The morphological analysis demonstrated that the blends prepared with the eccentric ro‐tor extruder had better compatibility than that with the twin‐screw extruder as confirmed by the difference between their glass transition temperatures.In conclusion,the eccentric rotor can generate a compulsory compatibilizing effect on the incompatible blending systems.
作者
何和智
王毅
高俊
HE Hezhi;WANG Yi;GAO Jun(Guangdong Key Laboratory of Advanced Polymer Manufacturing Technology and Equipment,Key Laboratory of Polymer Molding and Processing Engineering of Ministry of Education,School of Mechanical and Automotive Engineering,South China University of Technology,Guangzhou 510000,China)
出处
《中国塑料》
CAS
CSCD
北大核心
2021年第8期189-194,共6页
China Plastics
基金
十三五国家重点研发计划项目(2019YFC1908202)。
关键词
回收聚乙烯
偏心转子挤出机
力学性能
相容性
recycled polyethylene
eccentric rotor extruder
mechanical property
compatibility
