Rigid conjugated polymers

Kijima, M. Kinoshita, I. Hattori, T. Shirakawa, H. Poly(2,5-dialkoxy-/r-phenylenebutadiynylenejs. Novel rigid conjugated polymers with liquid crystalline property. Synth. Met. 1999, 70d(l), 61 69. 

For poor solubility as well as poor film forming nature of the rigid conjugated polymer and its nanocomposites, generally pellet is used as... 

Originally, side chains were introduced to comb-like polymers to improve solubility and achieve self-organization of rigid conjugated polymers such as polyaniline. Another... 

Binaphthyl-based rigid conjugated polymers not only are potentially useful as novel electrical and optical materials but also can be applied to prepare novel polymeric... 

Rigid conjugated polymers, such as poly(p-phenylene), poly(p-phenylene vinylene), and poly(p-phenylene ethynylene), are a class of polymers that have... 

Palanisamy A, Guo Q. Self-assembled multimicellar vesicles via complexation of a rigid conjugated polymer with an amphiphilic block copolymer. RSC Adv 2014 4(97) 54752-54759. 

The rigid chemical structure of a conjugated polymer helps in the movement of electrons. That stiff structure, however, has limited its use. They are like uncooked spaghetti and do not easily entangle themselves. Polymer chain entanglements are necessary to achieve high viscosities, which are required to create fibers out of these polymers. 

Nonconjugated polymers containing flexible backbones such as 43 are generally more soluble in common organic solvents titan the rigid, conjugated polymers36 ... 

C.C. Wu, P.Y. Tsay, H.Y. Cheng, and S.J. Bai, Polarized luminescence and absorption of highly oriented, fully conjugated, heterocyclic aromatic rigid-rod polymer poly-p-phenylenebenzoxazole, J. Appl. Phys., 95 417 123, 2004. 

Liu B, Yu W-L, Pei J, Liu S-Y, Lai Y-H, Huang W (2001) Design and synthesis of bipyridyl-containing conjugated polymers effects of polymer rigidity on metal ion sensing. Macromolecules 34 7932-7940... 

Dang, T. D., Bai, S. J., Heberer, D. R, Arnold, F. E. and Spry, R. J. 1993. Ionic conductivity of conjugated water-soluble rigid-rod polymers. Journal of Polymer Science Part B Polymer Physics 31 1941-1950. 

Whether polymerized model membrane systems are too rigid for showing a phase transition strongly depends on the type of polymerizable lipid used for the preparation of the membrane. Especially in the case of diacetylenic lipids a loss of phase transi tion can be expected due to the formation of the rigid fully conjugated polymer backbone 20) (Scheme 1). This assumption is confirmed by DSC measurements with the diacetylenic sulfolipid (22). Figure 25 illustrates the phase transition behavior of (22) as a function of the polymerization time. The pure monomeric liposomes show a transition temperature of 53 °C, where they turn from the gel state into the liquid-crystalline state 24). During polymerization a decrease in phase transition enthalpy indicates a restricted mobility of the polymerized hydrocarbon core. Moreover, the phase transition eventually disappears after complete polymerization of the monomer 24). 

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