Cellulose nanocrystals from curaua fibers and poly[ethylene‐ co ‐(vinyl acetate)] nanocomposites: Effect of drying process of CNCs on thermal and mechanical properties

2020 ◽  
Vol 41 (5) ◽  
pp. 1736-1748
Author(s):  
Ana Carolina Corrêa ◽  
Kelcilene Bruna Ricardo Teodoro ◽  
José Alexandre Simão ◽  
Pedro Ivo Cunha Claro ◽  
Eliangela Morais Teixeira ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Vinyl Acetate ◽  
Cellulose Nanocrystals ◽  
Thermal And Mechanical Properties ◽  
Drying Process ◽  
Poly Ethylene ◽  
Curaua Fibers

scholarly journals The Thermal and Mechanical Properties of Poly(ethylene-co-vinyl acetate) Random Copolymers (PEVA) and its Covalently Crosslinked Analogues (cPEVA)

Polymers ◽  
2019 ◽  
Vol 11 (6) ◽  
pp. 1055 ◽  
Author(s):  
Ke Wang ◽  
Qibo Deng
Keyword(s):  
Mechanical Properties ◽  
Thermogravimetric Analysis ◽  
Vinyl Acetate ◽  
Polymer Networks ◽  
Crosslinking Density ◽  
Random Copolymers ◽  
Melting Transition ◽  
Thermal And Mechanical Properties ◽  
Scanning Calorimetry ◽  
Poly Ethylene

The thermal and mechanical properties of poly(ethylene-co-vinyl acetate) random copolymers (PEVA) and its covalently crosslinked analogues (cPEVA) were controlled by the overall crystallinity of the polymer networks. The cPEVAs with different VA-content were synthesized by thermally-induced crosslinking of linear PEVA with dicumyl peroxide (DCP). This work was mainly concerned with the effect of vinyl acetate (VA) content on the crosslinking density, thermal and mechanical properties of PEVAs and cPEVAs, respectively. The chemical composition was analyzed by thermogravimetric analysis and 1H-NMR. The thermal and mechanical properties of PEVAs and cPEVAs have been studied through a series of conventional analytical methods, including gel content determination, different scanning calorimetry, thermogravimetric analysis, dynamic mechanical thermal analysis and traditional mechanical measurements. The experimental results show that the thermal and mechanical properties of PEVAs and cPEVAs increase with decreasing the VA-content. A broad melting transition with a ΔTm in the range from 78 °C to 95 °C was observed for all polymer networks.

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