Research Article
Foaming Behaviour, Structure, and Properties of Polypropylene Nanocomposites Foams
Table 2
DMA results of the solid and foamed unfilled, MMT, and CNF-reinforced PP foams.
| Material | Direction | (C) | at 20C (MPa) | Specific modulus (MPa·cm3·g-1) | S |
| PP | Solid | 5.4 | 1961.3 | 2114.4 | — | P | 6.6 | 206.5 | 676.3 | 1.1 | N | 4.7 | 179.9 | 589.2 |
| PP-MMT | Solid | 6.0 | 2010.0 | 2152.0 | — | P | 5.6 | 261.5 | 839.9 | 1.0 | N | 5.9 | 252.7 | 823.1 |
| PP-5% CNF | Solid | 5.2 | 1827.5 | 2006.0 | — | P | 4.5 | 235.4 | 801.5 | 1.1 | N | 2.5 | 209.6 | 713.6 | PP-10% CNF | Solid | 7.3 | 2300.3 | 2532.6 | — | P | 6.9 | 231.4 | 806.6 | 0.7 | N | 5.2 | 328.6 | 1100.9 | PP-20% CNF | Solid | 7.5 | 2732.7 | 2832.1 | — | P | 4.5 | 543.5 | 1230.0 | 1.0 | N | 4.3 | 473.6 | 1185.5 |
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—Glass transition temperature measured in
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