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Preparation and characterization of double shell microencapsulated ammonium polyphosphate and its flame retardance in polypropylene

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Abstract

Microencapsulated ammonium polyphosphate (MUFAPP) with a double shell is prepared by in situ polymerization, and is characterized by FTIR, XPS and SEM, etc. The microencapsulation of APP can increase its flame retardance and water resistance in PP. The flame retardant action of MUFAPP and APP in PP are studied using LOI and UL 94 test, and their thermal stability is evaluated by TG. The LOI value of the PP/MUFAPP composite at the same loading is higher than that of PP/APP composite. The LOI values of the PP/MUFAPP/ dipentaerythritol are higher than that of the PP/MUFAPP, and UL 94 ratings of most ternary composites are raised to V-0 at 30 wt.% loading. The results of the cone calorimeter also indicate that MUFAPP is an effective flame retardant in PP. The thermal degradation behaviors of APP and MUFAPP are studied using TG and dynamic FTIR.

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Acknowledgement

The financial support from the National Natural Science Foundation of China (no. 20776136), the program for New Century Excellent Talents in University and National 11th Five-year Program (2006BAK01B03, 2006BAK06B06, 2006BAK06B07) is acknowledged.

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Authors and Affiliations

  1. State Key Laboratory of Fire Science, University of Science and Technology of China, Anhui, 230026, China

    Kun Wu, Lei Song, Zhengzhou Wang & Yuan Hu

  2. School of Materials Science and Engineering, Tongji University, Shanghai, 200092, People’s Republic of China

    Zhengzhou Wang

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  1. Kun Wu
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  2. Lei Song
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  3. Zhengzhou Wang
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  4. Yuan Hu
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Correspondence to Zhengzhou Wang or Yuan Hu.

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Wu, K., Song, L., Wang, Z. et al. Preparation and characterization of double shell microencapsulated ammonium polyphosphate and its flame retardance in polypropylene. J Polym Res 16, 283–294 (2009). https://doi.org/10.1007/s10965-008-9228-9

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  • DOI: https://doi.org/10.1007/s10965-008-9228-9

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