Effect of Glass Fiber Mass Fraction on Properties of Nylon 6/Glass Fiber Composites

doi:10.12422/j.issn.1672-6952.2024.03.004

Abstract

Abstract:

Glass fiber (GF) reinforced nylon 6 (PA6) composites were prepared with a twin-screw extruder. The effects of GF mass fraction on the mechanical properties, thermal properties, density, water absorption and processability of PA6/GF composites were systematically investigated. The results show that the impact strength, tensile strength, flexural strength, flexural modulus, density and thermal deformation temperature of the composites increased with the increase of glass fiber content, while the water absorption and melt flow rate decreased with the increase of glass fiber mass fraction. The morphology showed that the GF was effectively wrapped and dispersed in the PA6 matrix when the GF mass fraction was increased up to 30%.

Key words: Glass fiber, Mechanical properties, Nylon 6

摘要：

采用双螺杆挤出机制备了玻璃纤维（GF）增强尼龙6（PA6）复合材料，系统地研究了GF质量分数对PA6/GF复合材料的力学性能、热性能、密度、吸水性和加工流动性的影响。结果表明，PA6/GF复合材料的冲击强度、拉伸强度、弯曲强度、弯曲模量、密度和热变形温度均随着GF质量分数的增加而增加，而吸水率和熔融指数随着GF质量分数的增加而减小。形态结构显示，当GF质量分数为30%时，GF在PA6基体中得到了有效的包裹和分散。

关键词: 玻璃纤维, 力学性能, 尼龙6

CLC Number:

TQ327.1

Ruixiang FENG, Mengqi MA, Xuebin LANG, Yuexin HU, Xiangyan HAN, Hongwei XU. Effect of Glass Fiber Mass Fraction on Properties of Nylon 6/Glass Fiber Composites[J]. Journal of Liaoning Petrochemical University, 2024, 44(3): 23-29.

冯瑞祥, 马梦绮, 郎学彬, 胡跃鑫, 韩向艳, 徐宏伟. 玻璃纤维质量分数对尼龙6/玻璃纤维复合材料性能的影响[J]. 辽宁石油化工大学学报, 2024, 44(3): 23-29.

Figures/Tables 13

Fig.1 Effect of GF mass fraction on the melt index of PA6/GF composite materials

Fig.2 Melting and crystallization behavior curves of PA6 and its blends

Table 1 DSC data of PA6 and its blends

样品	结晶温度/℃	熔融焓/ (J•g^-1)	结晶度/%
PA6 2000/GF30	192.51	51.49	32.0
PA6 2800/GF30	190.34	48.18	29.9
PA6 3200/GF30	189.57	38.98	24.2
PA6 2800	187.66	64.16	27.9
PA6 2800/GF10	189.01	59.38	28.7
PA6 2800/GF20	188.49	53.39	29.0
PA6 2800/GF40	190.01	42.48	31.3

Fig.3 Effect of GF mass fraction on hot deformation temperature of PA6/GF composite materials

Fig.4 Effect of GF mass fraction on density of PA6/GF composite materials

Fig.5 Effect of GF mass fraction on the impact strength of PA6/GF composite materials

Fig.6 Effect of GF mass fraction on the tensile properties of PA6/GF composite materials

Fig.7 Effect of GF mass fraction on the flexural strength and flexural modulus of PA6/GF composite materials

Fig.8 Effect of GF mass fraction on water absorption of PA6/GF composite materials

Fig.9 SEM images of PA6/GF composite materials with different viscosities of PA6 resin (× 500)

Fig.10 SEM images of PA6/GF composites with different GF mass fractions (× 300)

Fig.11 Optical microscope image of GF after high-temperature calcination of PA6/GF composite material

Table 2 Retention length of GF in PA6/GF composite materials

样品	$L n / m m$	$L w / m m$
PA6 2000/GF30	0.23	0.30
PA6 2800/GF10	0.27	0.33
PA6 2800/GF20	0.25	0.30
PA6 2800/GF30	0.22	0.29
PA6 2800/GF40	0.18	0.22
PA6 3200/GF30	0.19	0.24

Table 2 Retention length of GF in PA6/GF composite materials

样品	$L n / m m$	$L w / m m$
PA6 2000/GF30	0.23	0.30
PA6 2800/GF10	0.27	0.33
PA6 2800/GF20	0.25	0.30
PA6 2800/GF30	0.22	0.29
PA6 2800/GF40	0.18	0.22
PA6 3200/GF30	0.19	0.24

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