|
| Performance Test and Assessment of New Microencapsulated Polysulfide Rubber Sealant |
| Received:July 29, 2019 Revised:September 12, 2019 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2020.02.012 |
| KeyWord:microcapsule polysulfide rubber in situ polymerization mechanical properties |
| Author | Institution |
| WANG Xuan |
Laboratory for Metal Corrosion and Protection, Institute of Metal Research, Chinese Academy of Sciences, Shenyang , China;School of Materials Science and Engineering, University of Science and Technology of China, Hefei , China |
| YUAN Xu-wen |
Laboratory for Metal Corrosion and Protection, Institute of Metal Research, Chinese Academy of Sciences, Shenyang , China;School of Materials Science and Engineering, University of Science and Technology of China, Hefei , China |
| CAO Yang |
Laboratory for Metal Corrosion and Protection, Institute of Metal Research, Chinese Academy of Sciences, Shenyang , China;School of Materials Science and Engineering, University of Science and Technology of China, Hefei , China |
| WANG Hao-wei |
Aviation Key Laboratory of Science and Technology on Structural Corrosion Protection and Control, China Special Vehicle Research Institute, Jingmen , China |
| LIAO Sheng-zhi |
Aviation Key Laboratory of Science and Technology on Structural Corrosion Protection and Control, China Special Vehicle Research Institute, Jingmen , China |
| YANG Huai-yu |
Laboratory for Metal Corrosion and Protection, Institute of Metal Research, Chinese Academy of Sciences, Shenyang , China |
|
| Hits: |
| Download times: |
| Abstract: |
| The paper aims to design and evaluate a novel microcapsule of polysulfide rubber sealant. Microcapsules were designed and prepared by in situ polymerization technology with the poly (urea-formaldehyde) resin (PUF) as shell material and the polysulfide rubber as core material. By investigating the stability reliability and the mechanical properties (torque and tensile property) of the microcapsule sealant, the comprehensive properties of microcapsule sealant were evaluated systematically. The function of pre-coating of polysulfide sealant was realized by microencapsulation technology. In this way, the assembly procedures of polysulfide sealants can be simplified from five steps into one step. The experimental results of the stability and reliability of microcapsule sealant showed that the microcapsule particles maintained the structure and morphology during long term storage. The core materials were free from leakage and degeneration and were kept of good chemical reactivity. Experimental results of the mechanical properties further demonstrated that although the fracture elongation rates slightly decreased, the breakaway and disassembly torques as well as tensile strength (at break) of cured polysulfide films were greatly improved, compared with the original sealant. The polysulfide sealant microcapsules with regular morphology and single size distribution were successfully prepared by in situ polymerization of urea-formaldehyde, achieving the purpose of microencapsulation and immutability of liquid polysulfide. The introduction of the capsule wall material has great influences to the mechanical properties of sealant. |
| Close |
|
|
|