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沥青的短期和长期环氧树脂改性：改性动力学、流变性能和微观结构

Short- and Long-Term Epoxy Modification of Bitumen: Modification Kinetics, Rheological Properties, and Microstructure.

作者信息

Cuadri Antonio A, Delgado-Sánchez Clara, Navarro Francisco Javier, Partal Pedro

机构信息

Departamento de Ingeniería Química, Centro de Investigación en Tecnología de Productos y Procesos Químicos (Pro2TecS), Campus de 'El Carmen', Universidad de Huelva, 21071 Huelva, Spain.

出版信息

Polymers (Basel). 2020 Feb 26;12(3):508. doi: 10.3390/polym12030508.

DOI:10.3390/polym12030508
PMID:32110932
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7182878/
Abstract

Aiming to gain knowledge in the epoxy-bitumen modification mechanisms, this work explores the effects that epoxy concentration and ambient curing exert on the physico-chemistry and thermo-rheological properties of epoxy-modified binders. Process rheokinetics of epoxy-bitumen blends indicates that binder short-term modification (i.e., during processing) is accelerated by epoxy concentration. Furthermore, a synergistic effect of epoxy concentration and ambient curing is found during long-term modification (i.e., during curing at ambient conditions). As a result, viscous and viscoelastic rheological properties of binders are enhanced at medium/high in-service temperatures, at least, after one month of curing. FTIR (Fourier Transform Infrared spectroscopy) tests and SARAs (Saturates, Aromatics, Resins and Asphaltenes) analysis confirm the existence of esterification/etherification reactions between epoxy oxirane groups and the carbonyl groups available in aromatic and resin molecules. Thus, the new high molecular weight compounds increase the asphaltenic fraction of modified bitumen. Likewise, nonreversing heat flow curves obtained by modulated calorimetry corroborate the formation of such highly structured domains responsible for the final binder performance.

摘要

旨在了解环氧沥青改性机理，本研究探讨了环氧浓度和常温固化对环氧改性粘结剂物理化学和热流变性能的影响。环氧沥青共混物的过程流变动力学表明，环氧浓度加速了粘结剂的短期改性（即在加工过程中）。此外，在长期改性过程中（即在环境条件下固化期间）发现了环氧浓度和常温固化的协同效应。结果，至少在固化一个月后，粘结剂的粘性和粘弹性流变性能在中等/较高使用温度下得到增强。傅里叶变换红外光谱（FTIR）测试和饱和烃、芳烃、树脂和沥青质（SARA）分析证实，环氧环氧乙烷基团与芳烃和树脂分子中的羰基之间存在酯化/醚化反应。因此，新的高分子量化合物增加了改性沥青的沥青质含量。同样，调制量热法获得的不可逆热流曲线证实了这种高度结构化区域的形成，这些区域决定了最终粘结剂的性能。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1f85/7182878/1cba02e2c5d1/polymers-12-00508-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1f85/7182878/3a4b43860e46/polymers-12-00508-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1f85/7182878/9363236fc16b/polymers-12-00508-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1f85/7182878/5b6d34161842/polymers-12-00508-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1f85/7182878/80d2ef9de1d0/polymers-12-00508-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1f85/7182878/9e80873ddf57/polymers-12-00508-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1f85/7182878/a721f27f77af/polymers-12-00508-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1f85/7182878/ceb3e9acb522/polymers-12-00508-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1f85/7182878/1cba02e2c5d1/polymers-12-00508-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1f85/7182878/3a4b43860e46/polymers-12-00508-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1f85/7182878/9363236fc16b/polymers-12-00508-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1f85/7182878/5b6d34161842/polymers-12-00508-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1f85/7182878/80d2ef9de1d0/polymers-12-00508-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1f85/7182878/9e80873ddf57/polymers-12-00508-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1f85/7182878/a721f27f77af/polymers-12-00508-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1f85/7182878/ceb3e9acb522/polymers-12-00508-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1f85/7182878/1cba02e2c5d1/polymers-12-00508-g008.jpg

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本文引用的文献

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2
A review of the fundamentals of polymer-modified asphalts: Asphalt/polymer interactions and principles of compatibility.聚合物改性沥青基础综述：沥青/聚合物相互作用及相容性原理。
Adv Colloid Interface Sci. 2015 Oct;224:72-112. doi: 10.1016/j.cis.2015.07.010. Epub 2015 Aug 1.
3
The colloidal structure of bitumen: consequences on the rheology and on the mechanisms of bitumen modification.
环氧树脂/SBS复合改性沥青的高低温流变性能及耐油腐蚀性研究
Polymers (Basel). 2022 Dec 27;15(1):104. doi: 10.3390/polym15010104.
4
A Temperature-Independent Methodology for Polymer Bitumen Modification Evaluation Based on DSR Measurement.一种基于动态剪切流变仪测量的聚合物沥青改性评价的与温度无关的方法。
Polymers (Basel). 2022 Feb 22;14(5):848. doi: 10.3390/polym14050848.
沥青的胶体结构：对流变学及沥青改性机理的影响
Adv Colloid Interface Sci. 2009 Jan 30;145(1-2):42-82. doi: 10.1016/j.cis.2008.08.011. Epub 2008 Sep 9.