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.

Effect of Meta- and Para-Substitution of the Aromatic Diamines on the Properties of Poly(Amidoimidourethane)

2016 ◽  
Vol 721 ◽  
pp. 23-27 ◽  
Author(s):  
Ilya Kobykhno ◽  
Oleg Tolochko ◽  
Ekaterina Vasilyeva ◽  
Andrei Didenko ◽  
Danila Kuznetcov ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Thermal Analysis ◽  
Differential Scanning Calorimetry ◽  
Thermogravimetric Analysis ◽  
Polymer Structure ◽  
Multiblock Copolymers ◽  
Thermal And Mechanical Properties ◽  
Amino Groups ◽  
Scanning Calorimetry ◽  
Aromatic Diamines

The paper experimentally studies the effect of meta and para- substitution of the amino groups in the diamine used in the synthesis of multiblock copolymers. The way for synthesis of new multiblock copolymers with the possibility of replacing the diamine in the polymer structure was shown. Thermal and mechanical properties of synthesized copolymers had been characterized by means of differential scanning calorimetry, thermogravimetric analysis, dynamic mechanical thermal analysis and by nanoindentation and tensile test.

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

Influence of lignin modification on the mechanical properties of lignin/PEO blends

2016 ◽  
Vol 7 (6) ◽  
pp. 762-772 ◽  
Author(s):  
Stavros C. Anagnou ◽  
Eleni G. Milioni ◽  
Costas S. Mpalias ◽  
Ioannis A. Kartsonakis ◽  
Elias P. Koumoulos ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Tests ◽  
Mechanical And Thermal Properties ◽  
Thermal And Mechanical Properties ◽  
Scanning Calorimetry ◽  
Content Type ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene ◽  
Modified Lignin ◽  
Softwood Kraft Lignin

Purpose The purpose of this paper is to focus on the investigation of mechanical and thermal properties of lignin/poly (ethylene oxide) (PEO) blends, intended to be used as carbon fiber precursor. Design/methodology/approach Softwood kraft lignin was modified via esterification using phthalic anhydride and then blended with PEO. The final lignin/PEO ratios blends were (w/w) 20/80, 50/50 and 80/20 for both unmodified and modified lignin. The structural, thermal and mechanical properties of the blends were investigated by Fourier transform infrared, differential scanning calorimetry and tensile tests, respectively. Findings The results revealed that modified lignin/PEO blend (20/80) exhibited enhanced elongation. Originality/value The structural analysis as well as thermal and mechanical properties of the produced blends are clearly demonstrated.

Thermal and mechanical properties of simultaneous and sequential full-interpenetrating polymer networks

2004 ◽  
Vol 370 (1-2) ◽  
pp. 288-292 ◽  
Author(s):  
A Bartolotta ◽  
G Di Marco ◽  
M Lanza ◽  
G Carini ◽  
G D’Angelo ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Polymer Networks ◽  
Interpenetrating Polymer Networks ◽  
Thermal And Mechanical Properties
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