摘要
研究了在同向双螺杆挤出机不同混合段螺杆组合下制备玻璃纤维(GF)增强聚酰胺66(PA66)复合材料时的纤维破坏情况,并通过沿螺杆轴向取样分析纤维长度沿挤出方向的变化规律,研究了不同螺杆组合对制品力学性能的影响,设计出适合于PA66/马来酸酐接枝乙烯辛烯共聚物(POE-g-MAH)/GF体系的螺杆组合。结果表明,合理设计纤维加入后的螺杆组合可以有效提高剩余纤维长度及制品的力学性能,同捏合块相比,使用反向齿形盘能够在提供较强混合能力的同时保证较低的剪切强度,从而有利于保持纤维长度,并有助于纤维的分散及物料的混合;将混合元件分开布置,并用输送元件将其分隔开,有助于提高输送能力,保持纤维长度。
The fiber brakeage in glass fiber（GF） reinforced polyamide 66 （PA66） composites prepared under different screw assemblies of the co-rotating twin screw extruder was studied, and the change rule of the fiber length along the extruding direction was analyzed by sampling along the screw axis. The effect of different screw assemblies on mechanical properties of the composites was also studied, and the optimal screw assembly for PA66/maleic anhydride grafted ethylene-octene copolymer （POE-g-MAH）/GF composite was designed. It showed that the proper screw assembly could improve the residual fiber length and the mechanical property of the composite effectively, compared to the kneading blocks, the reverse combing mixer elements ZME could offer not only a strong distributive mixing ability, but also a relatively weak shear strength, which was effective to increase the fiber length, and good for fiber dispersion and material mixing. Arranging the mixing elements separately and separating every two mixing elements with conveying elements could improve the delivery capacity and conduce to keep the fiber length.
出处
《中国塑料》
CAS
CSCD
北大核心
2012年第2期93-98,共6页
China Plastics
