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Crystallization and melting behavior of PP/CaCO3 nanocomposites during thermo-oxidative degradation

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Abstract

The crystallization and melting behavior of PP/CaCO3 nanocomposites during thermo-oxidative degradation process were studied using differential scanning calorimetry and X-ray diffraction. The results indicated that addition of nano-CaCO3 and compatibilizer significantly reduced the thermo-oxidative stability of PP. Before degradation, thermal aging resulted in an increase in the melting temperature and crystallinity of PP due to the annealing crystallization. Thermo-oxidative degradation decreased the melting temperature and increased melting range, and caused an increase in crystallinity of PP due to the chemi-crystallization. The investigation also indicated that the influence of degradation on the small crystals were much more significant than that on the large ones.

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Acknowledgements

The project was supported by Natural Science Foundation of China (Grant No. 50873115), Doctoral Fund of Ministry of Education of China and Project of Science and Technology of Guangdong Province, China (Grant No. 0711020600002).

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Authors and Affiliations

  1. Key Laboratory of Polymeric Composites and Functional Materials, the Ministry of Education, Materials Science Institute, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou, 510275, People’s Republic of China

    Yuhai Wang, Hao Shen, Gu Li & Kancheng Mai

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  1. Yuhai Wang
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  2. Hao Shen
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  3. Gu Li
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  4. Kancheng Mai
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Correspondence to Kancheng Mai.

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Wang, Y., Shen, H., Li, G. et al. Crystallization and melting behavior of PP/CaCO3 nanocomposites during thermo-oxidative degradation. J Therm Anal Calorim 100, 999–1008 (2010). https://doi.org/10.1007/s10973-009-0267-1

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  • DOI: https://doi.org/10.1007/s10973-009-0267-1

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