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

材料导报

2024, Vol. 38

Issue (19): 23010114-6 https://doi.org/10.11896/cldb.23010114

高分子与聚合物基复合材料

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

雷经发^1,2, 沈强¹, 刘涛^1,2,3,*, 孙虹^1,2, 尹志强¹

1 安徽建筑大学机械与电气工程学院,合肥 230601
2 工程机械智能制造安徽省教育厅重点实验室,合肥 230601
3 灾害环境人员安全安徽省重点实验室,合肥 230601

Static and Dynamic Mechanical Properties and Microstructure Analysis of Polyvinyl Chloride/Thermoplastic Polyurethane Blended Alloy

LEI Jingfa^1,2, SHEN Qiang¹, LIU Tao^1,2,3,*, SUN Hong^1,2, YIN Zhiqiang¹

1 School of Mechanical and Electrical Engineering, Anhui Jianzhu University, Hefei 230601, China
2 Anhui Key Laboratory of Intelligent Manufacturing of Construction Machinery, Hefei 230601, China
3 Anhui Province Key Laboratory of Human Safety, Hefei 230601, China

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摘要为了揭示聚氯乙烯(PVC)/热塑性聚氨酯(TPU)共混合金的静动态力学性能以及微观结构对共混体系力学性能的影响,采用万能材料试验机和分离式霍普金森压杆(SHPB)实验装置对PVC/TPU合金开展准静态、动态力学性能实验,获取了较宽应变率范围(0.001～5 800 s^-1)内的应力-应变曲线,并通过傅里叶变换红外光谱(FTIR)及扫描电镜(SEM)对PVC/TPU合金微观结构进行表征。结果表明,材料在准静态拉伸及动态压缩下均具有显著的应变率强化效应。共混比会影响其微观结构及力学性能,共混比为90/10(PVC/TPU)时,材料弹性模量、峰值应力及断裂伸长率最高,且两相相容性最好;随着TPU占比增加,材料的拉伸与压缩力学性能下降,两相之间出现明显的界面层;此外,共混比为50/50时,材料相结构较为复杂,出现双连续相与“海-岛”结构共存的复杂形貌。

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	雷经发
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关键词: 共混合金力学性能应变率微观形貌

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

出版日期: 2024-10-10 发布日期: 2024-10-23

ZTFLH:

TQ334.1

基金资助: 合肥市自然科学基金(2024035);安徽高校自然科学研究重大项目(2023AH040036);安徽省教育厅高校优秀拔尖人才培育项目(gxbjZD2020078;gxyqZD2019057);灾害环境人员安全安徽省重点实验室开放课题(DEPS-2021-02)

通讯作者: ^*刘涛,通信作者,安徽建筑大学机械与电气工程学院副教授、硕士研究生导师。2012年合肥工业大学机械电子工程专业博士毕业。目前主要从事材料动态力学性能测试、无损检测等方面的研究工作。发表论文20余篇,其中SCI收录6篇,EI收录8篇。主持国家自然科学基金、安徽省自然科学基金等科研项目6项。tao.liu@ahjzu.edu.cn

作者简介: 雷经发,安徽建筑大学机械与电气工程学院教授、硕士研究生导师。2010年四川大学测试计量技术及仪器专业博士毕业。目前主要从事材料动态力学性能测试、机器视觉检测等方面的研究工作。发表论文30余篇,其中SCI收录8篇,EI收录10篇。主持安徽省重点研发项目、安徽省自然科学基金等省部级科研项目7项。

引用本文:

雷经发, 沈强, 刘涛, 孙虹, 尹志强. 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[J]. 材料导报, 2024, 38(19): 23010114-6.
LEI Jingfa, SHEN Qiang, LIU Tao, SUN Hong, YIN Zhiqiang. Static and Dynamic Mechanical Properties and Microstructure Analysis of Polyvinyl Chloride/Thermoplastic Polyurethane Blended Alloy. Materials Reports, 2024, 38(19): 23010114-6.

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http://www.mater-rep.com/CN/10.11896/cldb.23010114 或 http://www.mater-rep.com/CN/Y2024/V38/I19/23010114

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