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Morphology and rheology of poly(l-lactide)/polystyrene blends filled with silica nanoparticles

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Abstract

The successful development of co-continuous structure from poly(l-lactide) (PLLA) blends by melt mixing with lower PLLA content is highly desired in preparing macroporous biomaterials. However, the low viscosity of PLLA makes it difficult to prepare co-continuous PLLA blends at low PLLA concentration. In this study, hydrophilic silica nanoparticle is adopted to control the morphology of co-continuous polystyrene (PS)/PLLA blends. The influence of nanoparticle concentration on the co-continuity intervals and rheological properties of PS/PLLA blends are examined. The morphological stability of blends against melt annealing is also determined and discussed with a conceptual coarsening model for co-continuous structure. The results demonstrate that the incorporation of silica nanoparticles into PS/PLLA blends can be used to prepare macroporous PLLA structure with controllable pore size at lower PLLA content.

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Acknowledgements

The authors are grateful to the financial support from the National Natural Science Foundation of China (51003062). This study is also partially sponsored by the State Key Laboratory of Polymer Materials Engineering of China, Sichuan University.

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Authors and Affiliations

  1. College of polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering of China, Sichuan University, Chengdu, 610065, China

    Meng Zhang, Yajiang Huang, Miqiu Kong, Hong Zhu, Guangling Chen & Qi Yang

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  1. Meng Zhang
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  2. Yajiang Huang
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  3. Miqiu Kong
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  4. Hong Zhu
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  5. Guangling Chen
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Correspondence to Yajiang Huang.

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Zhang, M., Huang, Y., Kong, M. et al. Morphology and rheology of poly(l-lactide)/polystyrene blends filled with silica nanoparticles. J Mater Sci 47, 1339–1347 (2012). https://doi.org/10.1007/s10853-011-5908-7

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  • DOI: https://doi.org/10.1007/s10853-011-5908-7

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