Abstract
Poly(L-lactide)/poly(butylene adipate) (PLLA/PBA) crystalline/crystalline blends with different weight ratios (from 90/10 to 20/80) were prepared using a solution blend method. According to the differential scanning calorimetry (DSC) results and the optical microscopy (OM) images, PLLA was partially miscible with PBA. The crystallization morphologies of the PLLA/PBA blends formed in a high-temperature region and in a low-temperature region were studied separately. In the high-temperature region, Maltese-cross spherulites, banded spherulites and branched structures were observed by changing the weight ratio and the thickness of the specimen. The distribution of PLLA and PBA in these morphologies was determined using polarized OM, which utilized a hot stage. Additionally, the thickness of the PLLA lamella, which was determined from the DSC results, decreased slightly with increasing PBA concentration. In the low-temperature region, the effect of PLLA on the morphologies of PBA was studied. In PBA-rich blends, the morphology of the PBA crystal was not significantly affected by PLLA. However, in PLLA-rich blends, PBA formed fragments because solid PLLA restricted the growth of the PBA crystal. The thickness of the PBA lamella, which was determined from the DSC results, decreased with increasing PLLA concentration.
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References
Qiu, Z., Ikehara, T. & Nishia, T. Miscibility and crystallization in crystalline/crystalline blends of poly(butylene succinate)/poly(ethylene oxide). Polymer 44, 2799–2806 (2003).
Wang, H., Schultz, J. M. & Yan, S. Study of the morphology of poly(butylene succinate)/poly(ethylene oxide) blends using hot-stage atomic force microscopy. Polymer 48, 3530–3539 (2007).
Qiu, Z., Ikehara, T. & Nishia, T. Unique morphology of poly(ethylene succinate)/poly(ethylene oxide) blends. Macromolecules 35, 8251–8254 (2002).
He, S. & Liu, J. Crystallization and morphology development of binary crystalline poly(ethylene succinate)/poly(ethylene oxide) (pes/peo) blend with non-isothermal crystallization. Polym. J 39, 537–542 (2007).
Ikehara, T., Kimura, H. & Qiu, Z. Penetrating spherulitic growth in poly(butylene adipate-co-butylene succinate)/poly(ethylene oxide) blends. Macromolecules 38, 5104–5108 (2005).
Qiu, Z., Yan, C., Lu, J., Yang, W., Ikehara, T. & Nishia, T. Various crystalline morphology of poly(butylene succinate-co-butylene adipate) in its miscible blends with poly(vinylidene fluoride). J. Phys. Chem. B 111, 2783–2789 (2007).
Wang, H., Gan, Z., Schultz, J. M. & Yan, S. A morphological study of poly(butylene succinate)/poly(butylene adipate) blends with different blend ratios and crystallization processes. Polymer 49, 2342–2353 (2008).
Liu, J. & Jungnickel, B. J. Crystallization kinetical and morphological peculiarities in binary crystalline/crystalline polymer blends. J. Phys. Chem. B 111, 1917–1931 (2007).
Yokohara, T. & Yamaguchi, M. Structure and properties for biomass-based polyester blend of PLA and PBS. Euro. Polym. J 44, 677–685 (2008).
Lu, J., Qiu, Z. & Yang, W. Fully biodegradable polymer blends were prepared by blending PLLA with PES. Polymer 48, 4196–4204 (2007).
Blümm, E. & Owen, A. J. Miscibility, crystallization and melting of poly(3- hydroxybuty- rate)/poly(L-lactide) blends. Polymer 36, 4077–4081 (1995).
Focarete, M. L., Ceccorulli, G., Scandola, M. & Kowalczuk, M. Blends of atactic poly(3-hydroxybutyrate) with crystalline polyesters. Macromolecules 31, 8485–8492 (1998).
Qiao, Z., Zhang, X., Wang, N. & Fang, J. Poly(1,3-butylene adipate) plasticized poly(lactic acid)/carbon black as electrical conductive polymer composites. Polym. Compos. 30, 1576–1584 (2009).
Wang, N., Zhang, X., Yu, J. & Fang, J. Study of the properties of plasticized poly(lactic acid) with poly(1,3-butylene adipate). Polym. Polym. Compos. 16, 597–604 (2008).
Gan, Z., Abe, H. & Doi, Y. Temperature-induced polymorphic crystals of poly(butylene adipate). Macromol. Chem. Phys. 203, 2369–2374 (2002).
Zhao, L. & Gan, Z. Effect of copolymerized butylene terephthalate chains on polymorphism and enzymatic degradation of poly(butylene adipate). Polym. Degrad. Stab. 91, 2429–2436 (2006).
Gan, Z., Kuwabara, K., Abe, H., Iwata, T. & Doi, Y. Metastability and transformation of polymorphic crystals in biodegradable poly (butylene adipate). Biomacromolecules 5, 371–378 (2004).
Tsuji, H. & Ikada, Y. Blends of isotactic and atactic poly(lactide)s: 2. Molecular-weight effects of atactic component on crystallization and morphology of equimolar blends from the melt. Polymer 37, 595–602 (1996).
Focarete, M. L., CEccorulli, G., Scandola, M. & Kowalczuk, M. Further evidence of crystallinity-induced biodegradation of synthetic atactic poly(3-hydroxybutyrate) by phb-depolymerase a from pseudomonas lemoignei. blends of atactic poly(3-hydroxybutyrate) with crystalline polyesters. Macromolecules 31, 8485–8492 (1998).
Ohkoshi, I., Abe, H. & Doi, Y. Miscibility and solid-state structures for blends of poly[(S)-lactide] with atactic poly[(R,S)-3-hydroxybutyrate]. Polymer 41, 5985–5992 (2000).
Kim, K. S., Chin, I. J., Yoon, J. S., Choi, H. J., Lee, D. C. & Lee, K. H. Crystallization behavior and mechanical properties of poly(ethylene oxide)/poly(L-lactide)/poly(vinyl acetate) blends. J. Appl. Polym. Sci. 82, 3618–3626 (2001).
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The financial support of the Qingdao Science and Technology program of basic projects (No. 12-1-4-6-(6)-jch) and Shandong Province Natural Science Foundation ZR2012EMQ002 are gratefully acknowledged.
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Zhao, L., Peng, X., Liu, X. et al. Miscibility and morphology of binary crystalline blends of poly(L-lactide) and poly(butylene adipate). Polym J 45, 929–937 (2013). https://doi.org/10.1038/pj.2013.10
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DOI: https://doi.org/10.1038/pj.2013.10
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