Study on comprehensive properties and influencing factors of long glass fiber reinforced PA66 composites

doi:10.19491/j.issn.1001-9278.2022.03.001

Abstract

Abstract:

Long glass fiber reinforced polyamide 66 （PA66/LGF） composites are widely used in automobile and other industries due to their excellent comprehensive performance. In this paper， the PA66/LGF composites were prepared by a custom?made melt impregnation equipment， and the mechanical properties， interfacial adhesion and other properties of PA66/LGF composites were characterized. The effects of a series of influence， such as the glass fiber content， lubricant content， compatibilizer content， and pellet length， on the comprehensive properties of composites were investigated. Finally， we summarized the optimal formula design and pellet length for the preparation of PA66/LGF composites. The tensile strength， the elongation at break， the flexural strength， the notched impact strength and the non?notched impact strength of the PA66/LGF composites with a glass fiber content of 43 % and a pellet length of 12 mm prepared in this study were 230 MPa， 7.1 %，369 MPa，62 kJ/m²，90 kJ/m²，respectively.

Key words: polyamide 66, long glass fiber, mechanical property, formula design, pellet length

CLC Number:

TQ327.1

ZHANG Jiufu, LUO Kaiqiang, XU Jun, GUO Baohua. Study on comprehensive properties and influencing factors of long glass fiber reinforced PA66 composites[J]. China Plastics, 2022, 36(3): 1-8.

Figures/Tables 9

Fig.1. Preparation process of PA66/LGF pellets

性能	样品1	样品2
玻璃纤维含量/%	39.5	43.0
拉伸强度/MPa	192	240
断裂伸长率/%	5.9	6.9
弯曲强度/MPa	309	376
缺口冲击强度/kJ∙m^-2	49	61
无缺口冲击强度/kJ∙m^-2	67	84
L_n/mm	2.7	2.6
L_w/mm	3.9	3.8

Tab.1. Comprehensive properties of PA66/LGF composites with different glass fiber contents

Fig.2. Residual length distribution of glass fiber in samples 1 and sample 2

Fig.3. Effect of TAF content on mechanical properties of PA66/LGF composites

Fig.4. Impact profile of PA66/LGF composites with different TAF contents

Fig.5. Effect of compatilizer contents on properties of PA66/LGF composites

Fig.6. Impact profile of PA66/LGF composites with different compatilizer contents

Fig.7. Effect of pellet length on properties of PA66/LGF composites

Fig.8. Residual length distribution of glass fiber at different pellet lengths

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