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1.四川大学 高分子材料工程国家重点实验室 高分子研究所 成都 610065
2.金发科技股份有限公司企业技术中心 广州 510000
3.中国科学院长春应用化学研究所 高分子物理与化学国家重点实验室 长春 130022
Published:20 February 2023,
Published Online:14 October 2022,
Received:15 July 2022,
Accepted:09 September 2022
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刘双,黄茜,陈全等.流变技术在高分子表征中的应用:拉伸流变测试[J].高分子学报,2023,54(02):286-302.
Liu Shuang,Huang Qian,Chen Quan,et al.Application of Extensional Rheology in Polymer Characterization[J].ACTA POLYMERICA SINICA,2023,54(02):286-302.
刘双,黄茜,陈全等.流变技术在高分子表征中的应用:拉伸流变测试[J].高分子学报,2023,54(02):286-302. DOI: 10.11777/j.issn1000-3304.2022.22245.
Liu Shuang,Huang Qian,Chen Quan,et al.Application of Extensional Rheology in Polymer Characterization[J].ACTA POLYMERICA SINICA,2023,54(02):286-302. DOI: 10.11777/j.issn1000-3304.2022.22245.
流变测试是与高分子加工和应用相关的重要表征手段. 尤其在纺丝、发泡、吹膜、吹塑等以拉伸流场占主导的高分子加工工艺中,高分子的拉伸流变行为对材料聚集态结构的形成起了决定性的作用,进而影响了产品最终的使役性能. 本综述第一部分介绍了拉伸流场的定义、拉伸流场的分类以及各自的特征;第二部分概述了目前商业拉伸流变仪的种类,并围绕其基本原理、测试技巧以及优缺点等内容展开讲解;第三部分介绍了拉伸流变的测试模式,并举例说明了各个模式的优势;第四部分列出了在拉伸测试中存在的常见问题,并给出了相应的解决方案和建议;最后对拉伸流变与其他表征联用技术的发展趋势进行了总结和展望.
Knowledge of elongational properties of polymeric materials is important in different polymer processing techniques
particularly the fiber-spinning
foaming
and blow-molding techniques where the extensional flow is dominant. In this review
we summarize the methods of measuring extensional rheology for polymer melts and solutions. We start with explaining the definition and classification of different extensional flow fields in Section 1. In Section 2 we introduce different types of extensional rheometers
including Goettfert Rheotens
Münstedt Tensile Rheometer
Rheometrics Melt Extensometer
Sentmanat Extensional Rheometer
Filament Stretching Rheometer
and Capillary Breakup Extensional Rheometer. Their designing principles
operation methods
and advantages/disadvantages are described. In Section 3
we briefly introduce the different modes of extensional measurements
such as constant extensional rate
constant stress
stress relaxation and large amplitude oscillation modes. Some examples are included to elucidate the advantages of each mode. In Section 4
we give some suggestions and solutions for minimizing experimental errors and pushing the experimental limits. Finally
we highlight the importance of combining extensional rheology with other techniques in revealing more dynamic features of polymeric materials under extensional flow.
流变学拉伸流场拉伸流变仪拉伸测试
RheologyExtensional flow fieldExtensional rheometerExtensional rheology measurement
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