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首页> 外文期刊>Polymers for advanced technologies >The relationship between the compatibility and thermodegradation stability of modified polyetherimide/bismaleimide resins by hyperbranched polysiloxane with high degree of branching
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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

机译：高度支化的超支化聚硅氧烷对改性聚醚酰亚胺/双马来酰亚胺树脂的相容性与热降解稳定性之间的关系

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摘要

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℃ to 412℃. 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.
机译：具有高度支化度（0.8）的氨基末端超支化聚硅氧烷（AHBSi）用于改善聚醚酰亚胺（PEI）/烯丙基双酚A改性双马来酰亚胺（BD）共混物的相容性。深入研究了AHBSi / PEI / BD系统的相容性与热/热氧化稳定性之间的关系。尽管PEI具有高的热稳定性，但由于不相容性，PEI / BD共混物的热稳定性比BD树脂差。通过在PEI / BD混合物中添加AHBSi，AHBSi通过化学方法将PEI和BD连接起来，从而提高了兼容性。此外，有趣的是，热和热氧化稳定性均得到显着改善。在N_2气氛下，添加0.5 wt％的AHBSi使PEI / BD共混物的初始降解温度从395℃升高到412℃。研究了热降解动力学，结果表明，AHBSi / PEI / BD系统在N_2和空气中均具有更高的降解活化能。对这些有趣的结果背后的根源进行了深入研究。

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