Degradation evolution and mechanism of sheet molding compound with variable composition exposed to acid solution environment

Author:

Li Jian1,Fu Chao1,Ming Ruifeng2,Shi Minxian3,Dong Wenhao4,Guo Jiang5,Guo Xingkui6,Pan Duo7,Zhu Xiufang1,Alshammari Dalal A.8,Melhi Saad9,Li Mufang1,Thabet Hamdy Khamees10

Affiliation:

1. Hubei University of Automotive Technology

2. Hubei Dayan FRP Company Limited

3. Wuhan University of Technology

4. Taiyuan University of Science and Technology

5. Shaanxi University of Science & Technology

6. National University of Singapore

7. Zhengzhou University, Ministry of Education, Zhengzhou University

8. University of Hafr Al Batin

9. University of Bisha

10. Northern Border University

Abstract

Abstract

In the present work, the sheet molding compound (SMC) composites with variable filler, resin and fiber composition were prepared to investigate the effects of composition on acid resistance of SMC composites. The water absorption of SMC composites with various compositions was measured to estimate the influence of water on mechanical properties deterioration. Hardness and flexural properties tests were performed to investigate the degradation evolution. The degradation mechanism was revealed by analyzing the change of molecule configuration and evaluating the thermal stability. A minimum reduction of the flexural strength (3.21%) was observed on the SMC composites with 11.3 wt% hollow glass microspheres (HGMs). The chemical resistance and addition amount of the fillers had significant impacts on the acid resistance of SMC composites. A great flexural property and a minor degradation of flexural strength (6.29%) and modulus (7.86%) was obtained in SMC composites with the mixed resin. The resin characteristics, molecules weight, free volume size and polar groups number, had an important impact on the water absorption and acid resistance of SMC composites. A high flexural property and minor degradation of flexural strength (5.12%) and modulus (7.66%) was observed in SMC composites with 55 wt% glass fibers (GFs). Exposed to 25 ℃, 20 wt% sulfuric acid solution for 28 days, the SMC composites exhibited a minor degradation of HGMs and GFs. In this condition, the deterioration of mechanical properties was dominated by the resin matrix plasticization and decomposition, along with the interface degradation. It can be concluded that the original defects and weak interacted regions in the composites system initiated the degradation of SMC composites, while the microstructure and composition of SMC composites dominated the degradation progress.

Publisher

Springer Science and Business Media LLC

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3