Degradation Mechanism of Nonaqueous Reactive Polymer Grouting Materials under Chemical Corrosion Environment

腐蚀 材料科学 抗压强度 微观结构 极限抗拉强度 复合材料 傅里叶变换红外光谱 溶解 聚合物 化学工程 工程类
作者
Haoyue Zhang,Mingrui Du,Hongyuan Fang,Peng Zhao,Bo Han,Zhenyang Wang,Xueming Du
出处
期刊:Journal of Materials in Civil Engineering [American Society of Civil Engineers]
卷期号:35 (10) 被引量:1
标识
DOI:10.1061/jmcee7.mteng-15522
摘要

Nonaqueous reaction foam polyurethane (PU) grouting materials have found wide applications in civil engineering. However, degradation laws and mechanism of the strength performance of PU grouting materials in different corrosion environments are not clear yet. Here, the uniaxial compression test, scanning electron microscopy (SEM) characterization, Fourier-transform infrared (FTIR) spectroscopy test, and molecular dynamics (MD) simulations were conducted to investigate the influences of acidic and alkaline corrosion environments on the compressive strength, microstructure, molecular structures, and nanoscale mechanical properties. Results show that with the increase of corrosion time, the compressive strength of PU grouting materials decreases more and more. The deterioration effect of an acidic environment is stronger than that of an alkaline environment, and it is stronger when the acidic environment is with a lower pH value. At the microscale, the damage of carbamate esters and the breakage of ether bonds results in the fracture, hydrolysis, and dissolution of the long PU molecule chains, which is the main reason leading to the destruction of microfoams. Compared with sodium hydroxide solution, sulfuric acid solution produces more pronounced damage to molecular structures as well as microstructures, and thus more significant deterioration effect on compressive strength. At the nanoscale, the compressive strength, tensile strength, and shear strength of the amorphous PU elastomers after corrosion decreased by 26.7%–35.7%, 13.4%–27.9%, and 4.26%–12.73%, respectively, compared with the original model, illustrating the damaging effect of chemical corrosion on the nanostrength of the PU elastomer. MD simulation results also show that the length of the molecular chain has a great influence on compressive strength and tensile strength, and the absence of molecular fragments has a great influence on shear strength.
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
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

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
N_wh完成签到,获得积分10
刚刚
粽子完成签到,获得积分10
1秒前
执着夏岚完成签到 ,获得积分10
1秒前
hhyy发布了新的文献求助10
2秒前
蛋挞好好吃完成签到,获得积分10
2秒前
linjunqi发布了新的文献求助10
2秒前
2秒前
阿六完成签到,获得积分10
3秒前
doudou完成签到,获得积分10
3秒前
tang给张123的求助进行了留言
3秒前
务实映之完成签到,获得积分10
3秒前
为Zn发电完成签到,获得积分10
4秒前
星辰大海应助感动傀斗采纳,获得10
4秒前
4秒前
姚盈盈发布了新的文献求助10
4秒前
4秒前
SYLH应助粽子采纳,获得20
5秒前
洪星发布了新的文献求助10
6秒前
ljw完成签到,获得积分10
6秒前
6秒前
mariawang发布了新的文献求助10
7秒前
寒冷的老黑完成签到,获得积分10
7秒前
陈丽媛发布了新的文献求助10
7秒前
8秒前
Voloid完成签到,获得积分10
8秒前
8秒前
彬墩墩发布了新的文献求助10
8秒前
ywzwszl完成签到,获得积分10
8秒前
fang发布了新的文献求助10
9秒前
虚心的岩发布了新的文献求助10
9秒前
mumu完成签到,获得积分10
9秒前
沉静傲霜完成签到,获得积分10
9秒前
礽粥粥发布了新的文献求助10
10秒前
小二郎应助科研小辣鸡采纳,获得10
10秒前
11秒前
Allen完成签到,获得积分10
11秒前
彩虹绵绵冰完成签到,获得积分0
11秒前
www关注了科研通微信公众号
12秒前
深海鳕鱼完成签到,获得积分10
13秒前
XM完成签到,获得积分10
13秒前
高分求助中
【提示信息,请勿应助】关于scihub 10000
The Mother of All Tableaux: Order, Equivalence, and Geometry in the Large-scale Structure of Optimality Theory 3000
Social Research Methods (4th Edition) by Maggie Walter (2019) 2390
A new approach to the extrapolation of accelerated life test data 1000
北师大毕业论文 基于可调谐半导体激光吸收光谱技术泄漏气体检测系统的研究 390
Phylogenetic study of the order Polydesmida (Myriapoda: Diplopoda) 370
Robot-supported joining of reinforcement textiles with one-sided sewing heads 360
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 4009325
求助须知:如何正确求助?哪些是违规求助? 3549162
关于积分的说明 11301105
捐赠科研通 3283572
什么是DOI,文献DOI怎么找? 1810370
邀请新用户注册赠送积分活动 886205
科研通“疑难数据库(出版商)”最低求助积分说明 811301