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Ablation properties of zinc borate and aluminum hypophosphite filled silicone rubber composites
Author(s) -
Zhang Hao,
Yan Liwei,
Wang Yuan,
Zhou Shengtai,
Liang Mei,
Zou Huawei,
Chen Yang
Publication year - 2021
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.50804
Subject(s) - zinc borate , materials science , silicone rubber , composite material , scanning electron microscope , char , fourier transform infrared spectroscopy , hypophosphite , glycidyl methacrylate , zinc , silicone , epoxy , boron , aluminium , natural rubber , sodium hypophosphite , layer (electronics) , pyrolysis , chemical engineering , polymerization , fire retardant , metallurgy , polymer , chemistry , organic chemistry , electroplating , engineering
The ablative properties of epoxy modified silicone rubber composites filled with zinc borate (ZB) and aluminum hypophosphite (AHP) were studied. The decomposition of the added fillers and covering connection of residual on the substrate contribute to the improvement of heat insulation. The ablation test shows that the formation of a dense char layer with certain strength is key to improving the ablative properties. The optimal ablative performance is achieved when the concentration of ZB and AHP is 10 and 5 phr, respectively. Under such circumstances, the linear ablation rate is as low as 0.032 mm/s, which is about 61% lower than the pure silicone rubber. Furthermore, the structure and composition of the formed char layer were analyzed using X‐ray diffraction analysis, scanning electron microscopy, and Fourier transform infrared spectroscopy.