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Effect of ethyl cellulose microencapsulated ammonium polyphosphate on flame retardancy, mechanical and thermal properties of flame retardant poly(butylene succinate) composites

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Abstract

Ethyl cellulose, a widely used bio-degradable shell material, microencapsulated ammonium polyphosphate (MAPP) was added to the bio-degradable poly(butylene succinate) (PBS) to improve its flame retardancy, compatibility, and thermal stability. The MAPP was well characterized by Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, scanning electron microscopy (SEM), water contact angle, and thermogravimetric (TG) analysis. The SEM results indicate the improved dispersion of MAPP into PBS matrix and the formation of the strong interfacial adhesion between MAPP and PBS than APP. With the incorporation of MAPP and char-forming agent into PBS, the limiting oxygen index of the composite was increased to 35.5 %, and the sample can pass the UL-94 V-0 rating, while the un-microencapsulated counterpart cannot reach the rating. The cone calorimeter test showed that the peak heat release rate was decreased by 46.7 % and the burning time was also prolonged compared to the pure PBS. The increased melt flow index and rheology test indicated the increase of viscosity and the improvement of anti-dripping properties. Moreover, the mechanical properties and thermal stability of MAPP composite were also obviously enhanced after the microencapsulation by mechanical, dynamical mechanical thermal analysis, and TG analysis.

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Acknowledgements

The work was financially supported by National Basic Research Program of China (973 Program) (2012CB719701), National Natural Science Foundation of China (No. 51303167) and Opening Project of Southwest University of Science and Technology (No. 11ZXFK12).

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Authors and Affiliations

  1. State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei, 230026, Anhui, People’s Republic of China

    Weizhao Hu, Bibo Wang, Xin Wang, Hua Ge, Lei Song, Jian Wang & Yuan Hu

  2. Suzhou Key Laboratory of Urban Public Safety, Suzhou Institute for Advanced Study, University of Science and Technology of China, Suzhou, 215123, Jiangsu, People’s Republic of China

    Jian Wang & Yuan Hu

Authors
  1. Weizhao Hu
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  2. Bibo Wang
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  3. Xin Wang
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  4. Hua Ge
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  5. Lei Song
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  6. Jian Wang
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  7. Yuan Hu
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Correspondence to Jian Wang or Yuan Hu.

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Hu, W., Wang, B., Wang, X. et al. Effect of ethyl cellulose microencapsulated ammonium polyphosphate on flame retardancy, mechanical and thermal properties of flame retardant poly(butylene succinate) composites. J Therm Anal Calorim 117, 27–38 (2014). https://doi.org/10.1007/s10973-014-3680-z

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  • DOI: https://doi.org/10.1007/s10973-014-3680-z

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