化工新型材料

化工新型材料 ›› 2018, Vol. 46 ›› Issue (6) : 214-217.

科学研究

新型丁苯橡胶复合改性沥青的改性机理研究

作者信息 +

Improvement mechanism of new-style SBR compound modified asphalt

Tang Dong, Cong Yufeng, Huang Wei, Bai Shuangfu

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文章历史 +

Received		Published
2017-02-17		2018-07-03
Issue Date	Revised Date
2018-07-03	2017-02-17

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摘要

将C₉石油树脂和硫磺添加到丁苯橡胶(SBR)改性沥青中,制备了一种新型的SBR复合改性沥青,通过常规指标考察了C₉石油树脂对SBR/硫磺复合改性沥青物理性能的影响,利用红外光谱、热重和扫描电镜对SBR/硫磺/C₉复合改性沥青的改性机理进行探讨。结果表明:C₉石油树脂添加到SBR/硫磺复合改性沥青中使改性沥青的软化点、黏度升高,针入度下降,对低温延度影响不大;C₉石油树脂在硫磺的作用下与SBR发生了化学交联反应,形成了更加稳定且与基质沥青相容性较好的弹性网状结构大分子,使得改性沥青的热稳定性得到改善,为SBR/硫磺/C₉石油树脂改性沥青的进一步应用提供了理论依据。

Abstract

A new-style SBR compound modified asphalt can be made by the addition of C₉ petroleum resin,sulfur and SBR.The effects of C₉ petroleum resin,sulfur and SBR on the physical properties were investigated by conventional test.The modification mechanism of SBR/S/C₉ petroleum resin compound modified asphalt were investigated by infrared spectrum (IR),thermogravimetric analysis (TG) and scanning electron microscopy (SEM).The test results showed that the softening point and rotary viscosity increased,the penetration decreased with adding C₉ petroleum resin.The chemical crosslinking reaction occurred in modified asphalt when C₉ petroleum resin was added to SBR/S compound modified asphalt.The C₉ petroleum resin and SBR formed big molecule with elastic net structure under the action of sulfur bridge.The structure had fine stability and better compatibility with the matrix asphalt.The TG test showed that the modified asphalt had better thermal compatibility.A base in terms of microscopic structure was presented for the further application of SBR/S/C₉ petroleum resin compound modified asphalt.

关键词

丁苯橡胶(SBR)改性沥青 / C₉石油树脂 / 机理

Key words

SBR modified asphalt / C₉ petroleum resin / mechanism

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新型丁苯橡胶复合改性沥青的改性机理研究[J]. 化工新型材料, 2018, 46(6): 214-217 DOI:

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