Electron-withdrawing/donating effects of substituents on the preparation of phosphinated 4,4′-diaminodiphenylmethane for soluble, anti-oxidative, and high-Tg polyimides
Electron-withdrawing/donating effects of substituents on the preparation of phosphinated 4,4′-diaminodiphenylmethane for soluble, anti-oxidative, and high-Tg polyimides
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