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Investigation on multiple-melting behavior of nano-CaCO3/polypropylene composites

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Abstract

The multiple melting-peak behavior of polypropylene (PP) in nano-CaCO3/PP composites and modified nano-CaCO3/PP composites were investigated under the condition of isothermal crystallization and nonisothermal crystallization. The result indicated that the addition of nano-CaCO3 markedly increased the crystallization temperatures of PP and induced the formation of the β-crystal of PP. The crystallization temperatures of nano-CaCO3/PP composites modified by reactive monomers were further increased, but the melting-peak intensity of the β-crystal of PP was not greatly influenced. While in the presence of dicumyl peroxide, nano-CaCO3/PP composites modified by reactive monomers led to the significant increase in the melting-peak intensity of the β-crystal of PP. The double melting-peak of PP was observed, which was attributed to the formation of two kinds of different crystallization forms of α-crystal or β-crystal during the crystallization of PP. With the increase of crystallization temperatures, the double melting-peak moved toward the high-temperature side. The intensity of high-temperature melting peak was higher than that of low-temperature melting peak in nano-CaCO3/PP composites. While in modified nano-CaCO3/PP composites crystallized at higher temperature, the intensity of high-temperature melting peak was lower than that of low-temperature melting peak. The isothermal crystallization time had little effect on the melting temperatures.

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Authors and Affiliations

  1. Key Laboratory for Polymeric Composites and Functional Materials of Ministry of Education, Material Science Institute, College of Chemistry and Chemical Engineering, Zhongshan (Sun Yat-sen) University, Guangzhou, 510275, China

    Lin Zhidan, Zeng Chunlian & Mai Kancheng

  2. College of Science and Engineering, Jinan University, Guangzhou, 510632, China

    Lin Zhidan

Authors
  1. Lin Zhidan
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  2. Zeng Chunlian
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  3. Mai Kancheng
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Corresponding author

Correspondence to Mai Kancheng.

Additional information

Translated from Acta Scientiarum Naturalium Universitatis Sunyatseni, 2006, 45(2): 41–45 [译自: 中山大学学报 (自然科学版)]

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Lin, Z., Zeng, C. & Mai, K. Investigation on multiple-melting behavior of nano-CaCO3/polypropylene composites. Front. Chem. Eng. China 1, 81–86 (2007). https://doi.org/10.1007/s11705-007-0017-5

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  • DOI: https://doi.org/10.1007/s11705-007-0017-5

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