Abstract
The thermal decomposition kinetics of polyurethane/polyethyl acrylate interpenetrating polymer networks (PU/PEA IPN) were studied by means of thermogravimetry and derivative thermogravimetry (TG-DTG), and compared with those of polyurethane (PU) and polyethyl acrylate (PEA). The decomposition temperature (T i) of PU/PEA IPN was found to be higher thanT i of PEA, but lower thanT i of PU. Thermal decomposition kinetic parameters,n andE, estimated using Coats-Redfern method, are found for PU/PEA IPN, PU and PEA to be 1.6, 1.9 and 1.1, and 196.6, 258.6 and 139.2 kJ mol−1, respectively. The results show that PU/PEA IPN is neither a simple mixture of PU and PEA nor a copolymer of them. The mechanism of thermal decomposition of PU/PEA IPN is different from those of PU and PEA. The special network in PU/PEA IPN effectually protects weak bonds in the molecular chain of PU and PEA.
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We express our thanks to Dr. Yaxiong Xie and Zhiyuong Ren for their help in this work,
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Zhu, Y., Chang, L. & Yu, S. Polyurethane/polyethyl acrylate interpenetrating polymer networks. Journal of Thermal Analysis 49, 1513–1516 (1997). https://doi.org/10.1007/BF01983711
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DOI: https://doi.org/10.1007/BF01983711