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DMA Analysis of PVAc Latex Reinforced with Cellulose Nanofibrils
| Content Provider | Semantic Scholar |
|---|---|
| Author | López-Suevos, Francisco Eyholzer, Christian Bordeanu, Nico |
| Copyright Year | 2008 |
| Abstract | Suspensions of commercial refined and bleached beech wood pulp (RBP) were further processed through mechanical disintegration (MD-RBP), chemical modification (CM-RBP), or through chemical modification followed by mechanical disintegration (CM-MD-RBP). Nanocomposites were prepared by compounding a poly(vinyl acetate) (PVAc) latex adhesive with increasing contents of the untreated RBP or the processed nanofibrils, and the resulting nanocomposites were analyzed by dynamic mechanical analysis (DMA). The presence of cellulose nanofibrils had a strong influence on the viscoelastic properties of PVAc latex films. For all nanocomposites, increasing amounts of cellulose nanofibrils led to increasing reinforcing effects in the glassy, glass transition and rubbery plateau regions. At any given concentration, the CM-MD-RBP cellulose nanofibrils showed superior reinforcing potential, especially in the glass transitions of PVAc and polyvinyl alcohol (PVOH), and in the rubbery plateau. The untreated RBP fibrils that were only mechanically disintegrated showed higher reinforcement effect than those that were only chemically modified. Most interestingly, the reinforcing action of the CMMD-RBP (at 5, 10 and 20% concentrations) in the high temperature region was superior to the sum of the separate effects of the CM-RBP and MD-RBP, indicating a synergistic effect. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://www.swst.org/wp/meetings/AM08/proceedings/AP-6.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
