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- Title
Long‐chain polyester dicarboxylic acid‐induced rapid transesterification chemistry of biobased epoxy system for improved self‐repairing performances.
- Authors
Zhao, Shujun; Qu, Jiehao; Yin, Shengjiong; Liu, Xiangdong; Zhu, Hu
- Abstract
Constructing self‐repairing epoxy materials based on transesterification chemistry can be regarded as a potential path for practical industrial applications given on its simplicity and ease of processing. However, there is still a challenge to improve the slow bonding exchange process for desired healing performances. Herein, this work reports a simple and effective strategy to prepare high‐biomass‐content self‐repairing epoxy materials by introducing polyester oligomer (PEO) dicarboxylic acid as modifier into epoxidized soybean oil and itaconic acid compounds. The PEO is synthesized from glutaric anhydride and 1,4‐cyclohexanediol, as well possess a unique pentamer molecular structure. It not only endows the epoxy system with improved molecular mobility in virtue of its long‐chain structure, but also increases the number the essential ester groups of transesterification process, thus synergistically promoting bonding exchange rate for expected properties. As a result, the employment of PEO decreases the activation energy from 100 to 70 KJ/mol, as well as presents optimized self‐repairing efficiency in storage modulus and tensile strength tests compared to the control group. It may provide a new and practical way to fabricate high‐effective self‐repairing epoxy system for industrial applications.
- Subjects
TRANSESTERIFICATION; MOLECULAR structure; POLYESTERS; DICARBOXYLIC acids; SOY oil; EPOXY resins; ACTIVATION energy; EPOXY coatings; FATTY acid methyl esters
- Publication
Journal of Applied Polymer Science, 2024, Vol 141, Issue 26, p1
- ISSN
0021-8995
- Publication type
Article
- DOI
10.1002/app.55582