天然橡胶在芳烃油中溶胀和溶解过程的考察 |
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引用本文: | 王枫 匡民明 李关龙 周晓龙 李承烈. 天然橡胶在芳烃油中溶胀和溶解过程的考察[J]. 中国炼油与石油化工, 2015, 17(3): 76-86 |
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作者姓名: | 王枫 匡民明 李关龙 周晓龙 李承烈 |
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作者单位: | 1. 华东理工大学;2. East China University of Science and Technology;3. 华东理工大学化工学院; |
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摘 要: |
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关 键 词: | 橡胶 沥青 |
收稿时间: | 2015-03-04 |
修稿时间: | 2015-05-06 |
Investigation of swelling and dissolution process of nature rubber in aromatic oil |
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Abstract: | Aromatic oil has been used to promote the properties of crumb rubber modified asphalt which is an ideal method to deal with the resource utilization of waste tire rubber and by-product of refinery. Furfural extract oil (FEO) was separated into light fraction and heavy fraction. Swelling and dissolution process of nature rubber sheet in these three oils was investigated to deal with the interaction mechanism. Crumb rubber was also interacted with FEO and asphalt respectively. Energy dispersive spectrometer (EDS), thermo-gravimetric analysis (TGA) and scanning electron microscope (SEM) were used to characterize the chemical and structural properties of processed rubber. Chemical composition of processed oils and asphalt was investigated by using four groups analysis (SARA) and gel permeation chromatography. The results reveal that swelling rate and mass loss of rubber in oils were much higher than those in asphalt and rose with increasing process temperature. Heavy fraction of FEO had more diffusion and dissolving capacity than light fraction, whilst compatibility was observed between heavy fraction with light fraction. Selectivity absorption was not observed in the study and detachment of dissolved rubber happened from outside to inside. The cross-linking degree of the residue rubber kept unchanged with process time, and sulfur preferred to remain in the undissolved rubber. Dissolution of crumb rubber in oils was attributed to devulcanization, and that in asphalt mainly belonged to depolymerization. |
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Keywords: | Rubber asphalt |
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