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Estimated MWCNT determined using sp-ICP-MS that are released from aged polypropylene-CNT composites (a) PP41 with thickness 0.25 ± 0.01, (b) PP42 with thickness 0.50 ± 0.01, (c) PP43 with thickness 2.07 ± 0.06, that are aged for different selected times.
