浸渍方式对纤维增强聚酰胺6复合材料真空袋压成型工艺及性能的影响

利用己内酰胺的阴离子聚合，采用真空袋压成型（VBPM）法制备了玻璃纤维（GF）增强聚酰胺6 （PA6/GF）复合材料，通过自行搭建的连续纤维增强聚酰胺6反应注射VBPM实验平台，考察了浸渍方式等参数对复合材料单体转化率、结晶度、力学性能的影响。结果表明，用等温浸渍制得的复合材料结晶度高，且内部均匀性较好；与等温浸渍相比，非等温浸渍制得的复合材料整体反应转化率和力学性能较高；非等温浸渍制得的复合材料出口的弯曲强度和剪切强度比入口分别提高了10 %~13 %和11 %~16 %，弯曲强度在150 ℃出口处达到最大值273.65 MPa，剪切强度在170 ℃出口处时达到最大值47.32 MPa。

Effect of impregnation method on vacuum bag press molding process and properties of polyamide 6 composites

In this paper， glass fiber reinforced polyamide 6 （PA6/GF） composites were prepared through anionic polymeri?zation of caprolactam and vacuum?bag press molding （VBPM）. The effects of parameters such as curing temperature and impregnation method on the monomer conversion， crystallinity， and mechanical properties of the composites were investigated using continuous fiber?reinforced polyamide 6 reactive injection as a self?built VBPM experimental platform. The results indicated that the composites fabricated by isothermal impregnation had a high degree crystallinity and good internal homogeneity. Compared to the isothermal impregnation， the non?isothermal impregnation promoted higher overall reaction conversion and better mechanical performance for the fabricated composites. Through the non?isothermal impregnation， the composites obtained at the outlet achieved an increase in bending and shear strength by 10 %~13 % and 11 %~16 % than that at the inlet， respectively. The bending strength of the composites obtained at the outlet reached a maximum value of 273.65 MPa at 150 ºC， and their maximum shear strength reached 47.32 MPa at 170 ºC.