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Study on side-chain liquid–crystalline copolymer as a new β-nucleating agent to induce phase behavior of isotactic polypropylene

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Abstract

The nucleating activity of side-chain liquid–crystalline copolymer, as new β-nucleating agent (LCP-NA3), towards isotactic polypropylene (iPP) was investigated by differential scanning calorimetry, wide-angle X-ray diffraction, and polarized optical microscopy. The effect of LCP-NA3 content, crystallization temperature, and time on the phase behavior of the iPP has been discussed. The results indicate that the relative content of β-crystal mainly depends on LCP-NA3 content, crystallization temperature, and time. A high content of β-crystal can be obtained by the combined effect of the optimum LCP-NA3 concentration, crystallization temperature, and time. The maximum content of β-crystal reaches 0.63 when the LCP-NA3 content, crystallization temperature, and time are 0.8 wt%, 130 °C, and 1 h, respectively. In addition, LCP-NA3 is identified to have dual nucleating ability for α- and β-crystals under appropriate kinetic conditions.

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Acknowledgments

The authors are grateful to the Program for New Century Excellent Talents in University (NCET-07-0160), Science and Technology Bureau of Shenyang, and Fundamental Research Funds for the Central Universities (N110405006 and N110705001) for the financial support of this work.

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Authors and Affiliations

  1. College of Science, Northeastern University, Shenyang, 110004, People’s Republic of China

    Jing Sun, Jian-She Hu, Zhi-Xing Guo & Yang Qi

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  1. Jing Sun
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  2. Jian-She Hu
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  3. Zhi-Xing Guo
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  4. Yang Qi
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Correspondence to Jian-She Hu.

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Sun, J., Hu, JS., Guo, ZX. et al. Study on side-chain liquid–crystalline copolymer as a new β-nucleating agent to induce phase behavior of isotactic polypropylene. Colloid Polym Sci 291, 735–742 (2013). https://doi.org/10.1007/s00396-012-2783-y

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