Determination of the cross-linking degree of commercial ethylene-vinyl-acetate polymer by luminescence spectroscopy

2014 ◽  
Vol 21 (5) ◽  
Author(s):  
Jan Caspar Schlothauer ◽  
Rojonirina Maryline Ralaiarisoa ◽  
Arnaud Morlier ◽  
Marc Köntges ◽  
Beate Röder
Keyword(s):  
Vinyl Acetate ◽  
Ethylene Vinyl Acetate ◽  
Luminescence Spectroscopy ◽  
Cross Linking ◽  
The Cross

The Effect of Crosslinking on the Electro-Thermal Properties of Carbon Black and Ethylene-Vinyl Acetate Composites

2021 ◽  
Vol 903 ◽  
pp. 119-126
Author(s):  
Sintija Eglite ◽  
Astrida Berzina ◽  
Māris Knite
Keyword(s):  
Thermal Properties ◽  
Carbon Black ◽  
Vinyl Acetate ◽  
Ethylene Vinyl Acetate ◽  
Cross Linking ◽  
Ptc Effect ◽  
The Cross

Ethylene-vinyl acetate (EVA) and highly structured carbon black (CB) composites are promising for self-regulating heating materials, especially, were flexibility is needed. Two types of EVA-CB composites were made. Firstly, non-cross-linked EVA-CB composite was made with different CB concentrations and secondly, cross-linked EVA-CB composite with dicumylperoxide (DCP) as the cross-linking agent. Different concentrations of DCP were used. Samples were tested in two ways – by heating them internally (by applying 5V voltage) and externally (by heating in universal heating oven). The electro-thermal properties (including PTC effect) were determined.

Online determination of chemical and physical properties of poly(ethylene vinyl acetate) pellets using a novel method of near-infrared spectroscopy combined with angle transformation

2019 ◽  
Vol 11 (18) ◽  
pp. 2435-2442 ◽  
Author(s):  
Jinchun Xie ◽  
Hongfu Yuan ◽  
Chunfeng Song ◽  
Xiangjun Yan ◽  
Hao Yan ◽  
...  
Keyword(s):  
Quality Control ◽  
Infrared Spectroscopy ◽  
Vinyl Acetate ◽  
Near Infrared ◽  
Ethylene Vinyl Acetate ◽  
Melt Flow Rate ◽  
Production Processes ◽  
Novel Method ◽  
Poly Ethylene

Melt flow rate (MFR) and vinyl acetate content (VAC) are the target parameters for quality control of poly(ethylene vinyl acetate) (EVA) pellets in production processes.

scholarly journals Contact-free Determination of Ethylene Vinyl Acetate Crosslinking in PV Modules with Fluorescence Emission

2014 ◽  
Vol 55 ◽  
pp. 348-355 ◽  
Author(s):  
Arnaud Morlier ◽  
Marc Köntges ◽  
Susanne Blankemeyer ◽  
Iris Kunze
Keyword(s):  
Vinyl Acetate ◽  
Fluorescence Emission ◽  
Ethylene Vinyl Acetate ◽  
Pv Modules ◽  
Contact Free

Non-destructive monitoring of ethylene vinyl acetate crosslinking in PV-modules by luminescence spectroscopy

2017 ◽  
Vol 24 (12) ◽  
Author(s):  
Jan Caspar Schlothauer ◽  
Clea Peter ◽  
Christina Hirschl ◽  
Gernot Oreski ◽  
Beate Röder
Keyword(s):  
Vinyl Acetate ◽  
Ethylene Vinyl Acetate ◽  
Luminescence Spectroscopy ◽  
Pv Modules ◽  
Non Destructive

scholarly journals Influence on the cross-linking and plasticization degree of poly(ethylene-co-vinyl acetate) and evaluation of expansion capacity to the production of foams with supercritical CO2

2018 ◽  
Vol 35 (1) ◽  
pp. 23-40
Author(s):  
Matheus VG Zimmermann ◽  
Marcos Aurélio Colombo ◽  
Diego Pizza ◽  
Ademir J Zattera
Keyword(s):  
Vinyl Acetate ◽  
Polymer Matrix ◽  
Polymer Melt ◽  
Thermoplastic Elastomer ◽  
Cross Linking ◽  
Melt Temperature ◽  
Foaming Capacity ◽  
The Cross ◽  
Poly Ethylene ◽  
Foaming Temperature

The modification of a thermoplastic elastomer by cross-linking or plasticizing allows the manipulation of material properties for different applications. Cross-linking additives promote the increase of mechanical, thermal, and rheological properties, while the use of plasticizers has the opposite effect, giving the material soft properties. Such characteristics affect the development of polymeric foams directly, where the polymer matrix properties have large influence on the foaming capacity and morphology of the cells. This study investigated the use of cross-linking and plasticizer additives in ethylene-co-vinyl acetate copolymer, as well as its influence on the foaming capacity. The increasing content of cross-linking additive impacts on formation of preferentially closed cells, with high cell density and smaller size, while using plasticizers a higher occurrence of cell deformation and open cells was verified. The low formation of cells due to the decreasing of the polymer matrix thermal stability allows gases to escape during the processing and favors the cell coalescence effect. The foaming temperature is directly related to the polymer melt temperature, so, for the plasticizer-added samples, lower temperatures were required during the foaming than the samples with the cross-linking agent.

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