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Synthesis and characterization of microencapsulated dicyclopentadiene with melamine–formaldehyde resins

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Abstract

Microcapsules containing healing agents have been used to develop the self-healing polymeric composites. These microcapsules must possess special properties such as appropriate strength and stability in surrounding medium. A new series of microcapsules containing dicyclopentadiene (DCPD) with melamine–formaldehyde (MF) resin as shell material were synthesized by in situ polymerization technology. These microcapsules may satisfy the requirements for self-healing polymeric composites. The chemical structure of microcapsule was identified by using Fourier transform infrared (FTIR) spectrometer. The morphology of microcapsule was observed by using optical microscope (OM) and scanning electron microscope. Size distribution and mean diameter of microcapsules were determined with OM. The thermal properties of microcapsules were investigated by using thermogravimetric analysis and differential scanning calorimetry. Additionally, the self-healing efficiency was evaluated. The results indicate that the poly(melamine–formaldehyde) (PMF) microcapsules containing DCPD have been synthesized successfully, and their mean diameters fall in the range of 65.2∼202.0 μm when the adjusting agitation rate varies from 150 to 500 rpm. Increasing the surfactant concentration can decrease the diameters of microcapsules. The prepared microcapsules are thermally stable up to 69 °C. The PMF microcapsules containing DCPD can be applied to polymeric composites to fabricate the self-healing composites.

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Acknowledgments

The work was supported by the special research foundation of doctoral subject from the education department of high school (20050699034) and the graduate staring seed fund of Northwestern Polytechnical University (Z200584).

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Authors and Affiliations

  1. Department of Polymer Engineering, Materials Engineering Institute, Soochow University, Suzhou, Jiangsu, 215021, People’s Republic of China

    Guo-zheng Liang

  2. Department of Applied Chemistry, School of Science, Northwestern Polytechnical University, Xi’an, 710072, People’s Republic of China

    Li Yuan, Jian-qiang Xie & Shao-Bo He

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  1. Li Yuan
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  2. Guo-zheng Liang
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Correspondence to Guo-zheng Liang.

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Yuan, L., Liang, Gz., Xie, Jq. et al. Synthesis and characterization of microencapsulated dicyclopentadiene with melamine–formaldehyde resins. Colloid Polym Sci 285, 781–791 (2007). https://doi.org/10.1007/s00396-006-1621-5

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  • DOI: https://doi.org/10.1007/s00396-006-1621-5

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