清晨好,您是今天最早来到科研通的研友!由于当前在线用户较少,发布求助请尽量完整的填写文献信息,科研通机器人24小时在线,伴您科研之路漫漫前行!

The effect of composite curing agent ratio on the photooxidative aging behavior of epoxy asphalt based on molecular dynamics simulation

环氧树脂 材料科学 固化(化学) 复合材料 沥青 复合数 傅里叶变换红外光谱 亚甲基 化学工程 化学 有机化学 工程类
作者
Mingyue Li,Zhaohui Min,Han Ouyang,Fei Chen,Wei Huang
出处
期刊:Construction and Building Materials [Elsevier]
卷期号:409: 134157-134157 被引量:4
标识
DOI:10.1016/j.conbuildmat.2023.134157
摘要

In order to explore the effect of composite curing agent ratio on the photooxidative aging behavior of epoxy asphalt with an acidic composite curing system, three curing agent ratios of epoxy asphalt were prepared to obtain different cross-linking network densities. The prepared epoxy asphalt was subjected to photooxidation aging for 240 h at 60 ℃. Fourier transform infrared (FTIR) and elemental analysis tests were conducted to determine the evolution of chemical components during photooxidative aging. Based on the chemical components before and after aging, molecular models of photooxidation aged epoxy asphalt with different curing agent ratios were constructed. The mean square displacement (MSD) of oxygen atoms and the oxygen uptake of each component were calculated to study the diffusion behavior of oxygen atoms and the oxidation degree of each component under various cross-linking networks. Glass transition temperature (Tg) and interaction energy were determined to characterize the thermodynamic properties and interaction between asphalt phase and epoxy resin phase of epoxy asphalt before and after aging. The radial distribution function (RDF) was determined to simulate the distribution of asphaltene and epoxy resin crosslinked networks in different cross-linking networks. The results show that the formation of carbonyl groups, alcohol hydroxyl groups, and the fracture of methylene groups was observed during the photooxidative aging process of epoxy asphalt. The rise in the proportion of anhydride curing agents improved the stability of the chemical components in epoxy asphalt under photooxidation aging. High cross-linking density and methylene fracture weakened the diffusion ability of oxygen atoms in epoxy asphalt due to a reduction in free volume. In addition, photooxidation aging had a negative impact on the low-temperature performance and interaction between asphalt phase and epoxy resin phase of epoxy asphalt. However, a high content of acid anhydride alleviated the damage of photooxidation aging to low-temperature performance. Photooxidation aging developed the polar functional groups of epoxy asphalt, promoting the stacking of asphaltene under a high content of dicarboxylic acid curing agent, while breaking the stacking of asphaltene under a high content of acid anhydride curing agent.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
zhilianghui0807完成签到 ,获得积分10
6秒前
QiaoHL完成签到 ,获得积分10
18秒前
28秒前
Yolo完成签到 ,获得积分10
28秒前
方琼燕完成签到 ,获得积分10
28秒前
蔡勇强完成签到 ,获得积分10
30秒前
秋夜临完成签到,获得积分10
30秒前
樊樊樊梵情完成签到 ,获得积分10
33秒前
冰封火种发布了新的文献求助30
35秒前
亚麻帅帅完成签到 ,获得积分10
40秒前
Axel完成签到,获得积分10
49秒前
无幻完成签到 ,获得积分10
56秒前
poki完成签到 ,获得积分10
1分钟前
wendydqw完成签到 ,获得积分10
1分钟前
不与仙同完成签到 ,获得积分10
1分钟前
Shrimp完成签到 ,获得积分10
1分钟前
专注寻菱完成签到,获得积分10
2分钟前
courage完成签到 ,获得积分10
2分钟前
熊二完成签到,获得积分10
2分钟前
魏开铭发布了新的文献求助30
2分钟前
微卫星不稳定完成签到 ,获得积分10
2分钟前
nianshu完成签到 ,获得积分10
2分钟前
vampire完成签到,获得积分10
2分钟前
观妙散人完成签到,获得积分10
2分钟前
火星上的之卉完成签到 ,获得积分10
2分钟前
丘比特应助魏开铭采纳,获得10
2分钟前
叫我陈老师啊完成签到,获得积分10
2分钟前
刻苦的新烟完成签到 ,获得积分10
2分钟前
科研通AI5应助摆渡人采纳,获得10
3分钟前
小陈爱科研完成签到,获得积分10
3分钟前
Ray完成签到 ,获得积分10
3分钟前
3分钟前
摆渡人发布了新的文献求助10
3分钟前
整齐的惮完成签到 ,获得积分10
3分钟前
魏开铭完成签到,获得积分10
3分钟前
3分钟前
3分钟前
女儿国最后的希望完成签到,获得积分20
3分钟前
摆渡人完成签到,获得积分10
3分钟前
颜陌发布了新的文献求助10
3分钟前
高分求助中
Continuum Thermodynamics and Material Modelling 3000
Production Logging: Theoretical and Interpretive Elements 2700
Les Mantodea de Guyane Insecta, Polyneoptera 1000
Structural Load Modelling and Combination for Performance and Safety Evaluation 1000
Conference Record, IAS Annual Meeting 1977 820
電気学会論文誌D(産業応用部門誌), 141 巻, 11 号 510
Typology of Conditional Constructions 500
热门求助领域 (近24小时)
化学 材料科学 生物 医学 工程类 有机化学 生物化学 物理 纳米技术 计算机科学 内科学 化学工程 复合材料 基因 遗传学 物理化学 催化作用 量子力学 光电子学 冶金
热门帖子
关注 科研通微信公众号,转发送积分 3571317
求助须知:如何正确求助?哪些是违规求助? 3141926
关于积分的说明 9444838
捐赠科研通 2843331
什么是DOI,文献DOI怎么找? 1562830
邀请新用户注册赠送积分活动 731326
科研通“疑难数据库(出版商)”最低求助积分说明 718513