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The relationship between the compatibility and thermodegradation stability of modified polyetherimide/bismaleimide resins by hyperbranched polysiloxane with high degree of branching
Author(s) -
Sun Bin,
Qin Dake,
Liang Guozheng,
Gu Aijuan,
Yuan Li
Publication year - 2013
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.3180
Subject(s) - polyetherimide , materials science , branching (polymer chemistry) , compatibility (geochemistry) , composite material , polymer
Amino‐terminated hyperbranched polysiloxane (AHBSi) with high degree of branching (0.8) is used to improve the compatibilization of polyetherimide (PEI)/allyl bisphenol A modified bismaleimide (BD) blend. The relationship between the compatibility and thermal/thermal‐oxidative stability of the AHBSi/PEI/BD system is intensively investigated. Although PEI has high thermal stability, the PEI/BD blend has poorer thermal stability than BD resin due to the incompatibility. With the addition of AHBSi into the PEI/BD blend, AHBSi chemically connects PEI and BD, leading to the increased compatibility; moreover, interestingly, both thermal and thermo‐oxidative stabilities are significantly improved. Under a N 2 atmosphere, the addition of 0.5 wt% of AHBSi increases the initial degradation temperature of the PEI/BD blend from 395°C to 412°C. The thermodegradation kinetics were studied, and results show that the AHBSi/PEI/BD system has much higher activation energy of degradation in both N 2 and air atmospheres. The origin behind these interesting results is intensively investigated. Copyright © 2013 John Wiley & Sons, Ltd.