Journal
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
Volume 115, Issue -, Pages 215-227Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesa.2018.09.020
Keywords
Carbon nanotubes; Dispersion state; Mechanical properties; Anti-dripping
Funding
- National Natural Science Foundation of China [U1833113]
- Fundamental Research Funds for the Central Universities [WK2320000036]
- Research Grants Council of the Hong Kong Special Administrative Region, China [9042354, CityU 11261216]
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The performance of CNTs with different amounts and dispersion states were explored in the flame retardant system as PBS/APP. Herein, A series of CNTs wrapped ammonium polyphosphate (named CAPP) were successfully prepared and characterized, and then blended into Poly(butylene succinate) (PBS) as an additive-type flame retardant. The obtained PBS/CAPP contributes to forming much more graphitized char layers to reduce the heat transfer and toxic gases release. For instance, PBS-3 containing 20% CAPP1 wrapped by only 1% of CNTs shows the best anti-dripping effect and the lowest toxic gases release, where CO2 and CO yield dramatically reduced by about 68.3% and 72.6%. With the same content of CNTs, the tensile strength, elongation at break and unnotched impact strength of PBS-3 increased about 10.8%, 14.2% and 5.3% than PBS-5 (CNTs added directly). Thus, the well dispersion state of moderate CNTs has a positive impact on improving mechanical properties, flame retardancy and smoke suppression.
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