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Morphological and structural-rheological relationship in epiclon-based polyimide/hydroxypropylcellulose blend systems

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Abstract

Blends of hydroxypropyl cellulose (HPC) in lyotropic phase have been prepared with a new epiclon- based poly(amic acid) (PAA) or its corresponding polyimide (PI). The flow behaviour of their mixed solutions in N,N-dimethylacetamide (DMAc) was investigated by means of shear viscometry and oscillatory shear tests. The effect of composition, temperature and shear rate on the rheological functions reflects the orientation or mobility of the chain segments in the shear field. Specific interactions, such as the hydrogen bonds between PAA and the liquid crystalline component, stabilized the resulted morphology. The band texture, typical for lyotropic HPC solutions, evidencing different intensities and dimensions is observed from atomic force microscopy images in PAA/HPC and PI/HPC blends. The paper pursues some aspects concerning the obtaining of mixed alignment layers used in display devices.

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Acknowledgements

The authors are indebted to the Romanian National Council for Scientific Research in Higher Education (Project TD-547/2007), for financial support.

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Authors and Affiliations

  1. “Petru Poni” Institute of Macromolecular Chemistry, 41A Grigore Ghica Voda Alley, Iasi, 700487, Romania

    Andreea Irina Cosutchi, Camelia Hulubei, Iuliana Stoica & Silvia Ioan

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  1. Andreea Irina Cosutchi
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  2. Camelia Hulubei
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  3. Iuliana Stoica
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  4. Silvia Ioan
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Correspondence to Silvia Ioan.

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Cosutchi, A.I., Hulubei, C., Stoica, I. et al. Morphological and structural-rheological relationship in epiclon-based polyimide/hydroxypropylcellulose blend systems. J Polym Res 17, 541–550 (2010). https://doi.org/10.1007/s10965-009-9342-3

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  • DOI: https://doi.org/10.1007/s10965-009-9342-3

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