拉伸对PA6/PET/AX8900薄膜直线易撕裂性能的影响

doi:10.11896/cldb.21050030

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Abstract Using PA6 as the matrix and introducing the PET phase to prepare five different blending ratios of PA6/PET/AX8900 blended films and biaxially oriented films. Morphology, thermodynamics and crystallization behavior of the PA6/PET/AX8900 blended films before and after biaxial stretching were studied by SEM, DMA, DSC, etc. The linear tearing performance, mechanical properties, barrier properties and optical properties of the blend film were discussed. At the same time, the influence of the compatibilizer EAG (AX8900) on the compatibility of PA6 and PET was studied. The research results show that the addition of 3wt% AX8900 has a significant compatibilizing effect on the PA6/PET blend film, and the PET is well dispersed in the PA6 matrix;when the amount of PET added was increased from 0wt% to 35wt%, the melting point of the PA6/PET/AX8900 blend film decreased. At the same time, due to the presence of rigid benzene rings in PET, the crystallization temperature dropped from 187.01 ℃ to 183.47 ℃. The mechanical performance test showed that when the amount of PET added was 25wt%, the tensile strength of the PA6/PET/AX8900 film was increased by 25% compared with the pure PA6 film, and the elongation at break was basically unchanged. When the stretch ratio was 3×1, the tensile strength of the PA6/PET/AX8900 biaxially oriented film with a PET addition of 25wt% was 88% higher than that of pure PA6. The results of the straight-line tear test showed that when the amount of PET added was increased from 0wt% to 25wt%, the tear deviation of the blend film decreased from 100% to 46%. After the PA6/PET/AX8900 blend film with a PET content of 25wt% was biaxially stretched, the tear deviation was significantly lower than that of the unstretched PA6/PET/AX8900 blend film. When the stretch ratio was 3×1, the PA6/PET/AX8900 blend film had a tear deviation of 3.2%. In addition, when the added amount of PET was 25wt%, the barrier properties and haze of the PA6/PET/AX8900 blend film were improved.

Key words： PA6/PET/AX8900 film compatibility biaxial stretching crystal structure linear tear property

Published: 10 May 2023 Online: 2023-05-04

CLC number:

TB34

Fund:National Natural Science Foundation of China (11872179), Natural Science Foundation of Hunan Province (2018JJ4072), and Scientific Research Projects of Hunan Provincial Department of Education (18K079, 19A138).

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	DONG Yu
	LIU Yuejun
	CUI Lingna
	LIU Xiaochao
	FAN Shuhong
	LI Xia

Cite this article:

DONG Yu,LIU Yuejun,CUI Lingna, et al. Effect of Stretching on Linear Tear Property of PA6/PET/AX8900 Film[J]. Materials Reports, 2023, 37(9): 21050030-8.

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http://www.mater-rep.com/EN/10.11896/cldb.21050030 OR http://www.mater-rep.com/EN/Y2023/V37/I9/21050030

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