基于动态热机械分析的非水反应高聚物材料动态黏弹特性试验研究
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作者单位:

郑州大学

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中图分类号:

TU411

基金项目:

中国博士后面上基金项目;河南省高等学校重点科研项目;国家自然科学基金项目(面上项目,重点项目,重大项目)


Experimental research on dynamic viscoelastic property of non-water reacted polymer materials based on dynamic thermomechanical analysis
Author:
Affiliation:

zhengzhou university

Fund Project:

Supported by China Postdoctoral Science Foundation;Foundation of He’nan Educational Committee;The National Natural Science Foundation of China (General Program, Key Program, Major Research Plan)

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    摘要:

    非水反应高聚物材料是新型的防渗修复支护材料,具有轻质、早强、高韧、耐久和环保等特性,目前已广泛应用于基础工程设施水灾害防治与修复工程中。在实际工程应用中,高聚物材料经常处于动载作用下,其黏弹特性对高聚物复合结构的动力反应分析非常重要。本文首次将动态热机械分析技术应用于非水反应高聚物材料动态黏弹特性研究中。设计并制作了非水反应高聚物材料的DMA试验模具,解决了精确测定非水反应高聚物材料温度谱和频率谱的关键试验问题;分析了非水反应高聚物材料频率谱,研究了其黏弹特性随频率和密度的变化规律并探讨了相关机理,研究了高聚物材料高、低温性能,对比分析了非水反应高聚物材料在浸泡条件下与非浸泡条件下的黏弹特性差异,并给出了浸泡条件下储能模量、损耗因子与密度和频率的函数关系式。研究表明:非水反应高聚物材料是一种耐热性和耐寒性均良好的工程材料,在非水环境下该材料的黏弹性受频率(大于20Hz)影响较大,在水环境下受密度的影响较大,在工程应用上需引起注意。

    Abstract:

    Non-water reacted polymer materials are new type materials for anti-seepage repairing and supporting, which have advantages of light, early strength, ductile, durable and environment-friendly properties. Therefore they have been widely applied in water disaster prevention of foundation engineering. However polymer materials are usually under dynamic working loads and their viscoelastic properties are very important for dynamic response analysis of polymer composite structures. In this paper, dynamic thermomechanical analysis was firstly used to study the dynamic viscoelastic properties of non-water reacted polymer materials. The moulds for DMA tests of non-water reacted polymer materials were designed and made. The important problems for accurately testing viscoelastic properties of non-water reacted polymer materials were solved. Then frequency and temperature spectra of non-water reacted polymer materials were analyzed and the changing laws of the variation of frequency and density for dynamic viscoelastic properties were studied. Also high and low temperature properties and engineering applicability of polymer materials were researched. Meanwhile the difference of dynamic viscoelastic properties with water or without water was contrasted, the functional relations of storage modulus and loss factor with density and frequency were also obtained. The results show that non-water reacted polymer material is an engineering material with good heatproof and cold resistant abilities. The viscoelasticity of the material is greatly affected by the frequency (greater than 20 Hz) without water, and in water environment is greatly affected by density, which should arouse adequate attention in engineering application.

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  • 收稿日期:2019-07-10
  • 最后修改日期:2019-09-21
  • 录用日期:2019-09-23
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