Characterization of novel optically active conjugated polyarylenes and poly(aryleneethnylene)s by a combination of off-line static and dynamic light scattering with gel permeation chromatography
✍ Scribed by Simon C. M. Kwan; Qiao-Sheng Hu; Liang Ma; Lin Pu; Chi Wu
- Publisher
- John Wiley and Sons
- Year
- 1998
- Tongue
- English
- Weight
- 199 KB
- Volume
- 36
- Category
- Article
- ISSN
- 0887-6266
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✦ Synopsis
By combining the offline static and dynamic laser light scattering (LLS) and gel permeation chromatography (GPC) results of a broadly distributed polymer sample, we were able to characterize a series of chiral binaphthyl-based polyarylenes and poly(aryleneethnylene)s in THF at 25°C. For each of the samples, we obtained not only the weight-average molar mass M w , the second virial coefficient A 2 and the z-average translational diffusion coefficient ϽDϾ, but also two calibrations: V ϭ A ϩ Blog(M) and D ϭ k D M Ϫ␣D , where V, D, and M are the elution volume, the translational diffusion coefficient and the molar mass for monodisperse polymer chains, respectively, and A, B, k D , and ␣ D are four calibration constants. Using these calibrations, we estimated the molar mass distributions of these novel polymers. We showed that using polystyrene to calibrate the GPC columns could lead to a smaller M w . Our results indicate that all the polymers studied have a rigid chain conformation in THF at 25°C and the introduction of the -NO 2 groups into the monomer can greatly promote the polymer solubility in THF.