Abstract
The novel interpenetrating polymer networks (IPNs) based on cycloaliphatic epoxy resin (CER) containing cyclohexene oxide groups and tri-functional acrylate, trimethylol-1, 1, 1-propane trimethacrylate (TMPTMA) were synthesized. The formation of the IPNs was on-line monitored by means of polarizing optical microscope, time-resolved light scattering and Fourier transform infrared spectroscopy. The morphological and mechanical properties of the resultant IPNs were investigated and evaluated with scanning electron microscopy (SEM) and dynamical thermal mechanical analysis (DTMA), respectively. The on-line monitoring results showed that during the course of the IPNs formation, the TMPTMA component was cured more quickly than the CER component, leading to the formation of the sequential IPNs. During the early curing stage, there were the phase separation phenomena in the CER/TMPTMA system. The SEM results revealed that although there were some slight phase separation phenomena in the CER/TMPTMA system in the early curing stage, the resultant IPNs displayed the homogeneous structures and did not show the apparent phase separation morphology. The DTMA results revealed that the resulting IPNs exhibited rather higher modulus and denser cross-linking network structure than the neat CER system.
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Acknowledgements
Thanks are due to Prof. Shanjun Li, the Key Laboratory of Molecular Engineer of Polymer, Ministry of Education, Department of Macromolecular Science, Fudan University, for the discussion, kind advice and his help to supply measurement about TRLS. The authors gratefully acknowledge the financial support of Shanghai committee of Science Technology by the funds for Major Research Project of Shanghai City (No. 05dz22303).
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Duan, J., Kim, C. & Jiang, P. On-line monitoring of cycloaliphatic epoxy/acrylate interpenetrating polymer networks formation and characterization of their mechanical properties. J Polym Res 16, 45–54 (2009). https://doi.org/10.1007/s10965-008-9201-7
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DOI: https://doi.org/10.1007/s10965-008-9201-7