聚氯乙烯/热塑性聚氨酯共混合金的静动态力学性能及微观结构分析

doi:10.11896/cldb.23010114

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Abstract To reveal the static and dynamic mechanical properties of polyvinyl chloride (PVC)/thermoplastic polyurethane (TPU) blended alloy and the effect of microstructure on the mechanical properties of the blend system, quasi-static and dynamic mechanical properties experiments were conducted on PVC/TPU alloy specimens using a universal material testing machine and a split Hopkinson pressure bar (SHPB) experimental setup. The stress-strain curves in the wide strain rate range (0.001—5 800 s^-1) were obtained, and the structure and properties of PVC/TPU alloy were characterized by FTIR and SEM. The results indicate that the material exhibits significant strain rate strengthening effects under quasi-static tension and dynamic compression. The blending ratio affects its microstructure and mechanical properties. When the blending ratio is 90/10 (PVC/TPU), the material has the highest elastic modulus, peak stress, and elongation at break, and the compatibility between the two phases is the best. As the proportion of TPU increases, the tensile and compressive mechanical properties of the material decrease, and a clear interface layer appears between the two phases. In addition, when the blending ratio is 50/50, the phase structure of the material is relatively complex, resulting in a complex morphology where the bicontinuous phase coexists with the ‘sea island' structure.

Key words： blended alloy mechanical property strain rate micro-morphology

Published: 10 October 2024 Online: 2024-10-23

CLC number:

TQ334.1

Fund:Hefei Natural Science Foundation Project (2024035), the Major Project of Natural Science Research in Anhui Universities (2023AH040036), the Anhui Provincial Department of Education Excellent Top Talents Cultivation Project for Universities (gxbjZD2020078, gxyqZD2019057), the Anhui Province Key Laboratory of Human Safety Open Subjects (DEPS-2021-02).

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	LEI Jingfa
	SHEN Qiang
	LIU Tao
	SUN Hong
	YIN Zhiqiang

Cite this article:

LEI Jingfa,SHEN Qiang,LIU Tao, et al. Static and Dynamic Mechanical Properties and Microstructure Analysis of Polyvinyl Chloride/Thermoplastic Polyurethane Blended Alloy[J]. Materials Reports, 2024, 38(19): 23010114-6.

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http://www.mater-rep.com/EN/10.11896/cldb.23010114 OR http://www.mater-rep.com/EN/Y2024/V38/I19/23010114

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