SI-RAFT/MADIX polymerization of vinyl acetate on cellulose nanocrystals for nanocomposite applications
2016 (English)In: Polymer, ISSN 0032-3861, E-ISSN 1873-2291, Vol. 99, 240-249 p.Article in journal (Refereed) Published
In the present work, poly(vinyl acetate) grafted cellulose nanocrystals (CNC-g-PVAc) were prepared via surface initiated reversible addition-fragmentation chain transfer and macromolecular design via the interchange of xanthates (SI-RAFT/MADIX) polymerization. Successful grafting of PVAc from CNC was confirmed by FT-IR and TGA analysis. PVAc nanocomposites reinforced with CNC-g-PVAc, as well as pristine CNC for comparison, of different weight percentages (0.5, 1, 3 and 5 wt%) of CNC were prepared via solvent casting. The PVAc reinforced with CNC-g-PVAc resulted in higher transparency and improved mechanical properties compared with unmodified CNC nanocomposites. The addition of 5 wt% CNC-g-PVAc increased the modulus of neat PVAc with as much as 154%. The proposed SI-RAFT/MADIX on CNC could be applied to wide range of monomers, and it is believed to be an efficient and robust method for CNC functionalization, thus expanding the potential applicability of CNC.
Place, publisher, year, edition, pages
Elsevier, 2016. Vol. 99, 240-249 p.
SI-RAFT/MADIX, R-group approach, Polyvinyl acetate (PVAc), Cellulose nanocrystals (CNC), Nanocomposites
IdentifiersURN: urn:nbn:se:kth:diva-194001DOI: 10.1016/j.polymer.2016.07.013ISI: 000383885000028ScopusID: 2-s2.0-84978427187OAI: oai:DiVA.org:kth-194001DiVA: diva2:1038895
QC 201610202016-10-202016-10-142016-10-20Bibliographically approved