Thermal expansion coefficients and moduli of uniaxially stretched polyimide films with rigid and flexible molecular chains

Phase structures and transition behavior

Phase structures and transition behaviors in polymers containing rigid rodlike backbones with flexible side chains. V. Methylene side-chain effects on structure and molecular motion in a series of polyimides

✍ Kevin W. McCreight; Jason J. Ge; Mingming Guo; Ian Mann; Fuming Li; Zhihao Shen; 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 393 KB 👁 2 views

A series of organo-soluble hairy-rod polyimides was recently synthesized from 3,3Ј,4,4Ј-biphenyltetracarboxylic dianhydride (BPDA) and di[n-alkyl]-4,4Ј-diamino-6,6Ј-dibromo-2,2Ј-biphenyldicarboxylate with side chains of varying lengths (the numbers of methylene units), BACBP(n). Dynamic mechanical (