Effect of cross-linking agent on ethylene vinyl acetate/polyoctenamer modified bitumen

2018 ◽  
Vol 20 (7) ◽  
pp. 1615-1623 ◽  
Author(s):  
Rabindra K Padhan ◽  
Anurag A. Gupta ◽  
Anand Sreeram
Keyword(s):  
Vinyl Acetate ◽  
Ethylene Vinyl Acetate ◽  
Cross Linking ◽  
Modified Bitumen

The modification of bitumen with styrene–butadiene–styrene, ethylene vinyl acetate and varying the amount of reactive ethylene terpolymer

2017 ◽  
Vol 50 (3) ◽  
pp. 241-255 ◽  
Author(s):  
Seyfullah Keyf
Keyword(s):  
Vinyl Acetate ◽  
Softening Point ◽  
Elastic Recovery ◽  
Ethylene Vinyl Acetate ◽  
Modified Bitumen ◽  
Penetration Index ◽  
Different Types ◽  
Styrene Butadiene Styrene ◽  
Styrene Butadiene ◽  
Butadiene Styrene

In this article, 50/70 penetration grade TUPRAS bitumen was modified. Reactive elastomeric terpolymer (Elvaloy RET; DuPont Company), ethylene vinyl acetate (EVA) and styrene–butadiene–styrene (SBS) polymers were used in bitumen modification. Set hours of the tests were applied to samples taken from the obtained modified bitumen mixture. Varying amount of reactive ethylene terpolymer with weight ratios of 0.5%, 1.0%, 1.5%, 2.0% and 2.5% were introduced to the mixture of raw bitumen with 1.0% SBS and 1.0% EVA. Penetration, penetration index, softening point, ductility and elastic recovery tests were performed with these modified bitumen and raw bitumen. The samples of raw bitumen and modified bitumens of 2.0% Elvaloy RET, 1.0% SBS and 1.0% EVA were investigated by means of IR spectroscopy. The raw bitumen was modified with SBS, EVA and RET, and it was determined that penetration and ductility values were decreased while penetration index, softening point and elastic recovery were increased. The purpose of this study is to research the improving properties of 50/70 penetration grade–modified bitumen used in highways of Turkey. The most important characteristics (such as softening point, penetration and % elastic recovery) of new polymer-modified bitumen (NPMB) containing 2.5% EVA, 1% RET and 1% SBS were compared with eight different types of polymer-modified bitumens in Turkey (TPMB). NPMB provided all required parameters (softening point, penetration and % elastic recovery) for five different types of TPMBs (TPMB 70-16, TPMB 70-22, TPMB 76-16, TPMB 76-22 and TPMB 82-16).

scholarly journals WORKABILITY AND RHEOLOGICAL PROPERTIES OF EVA-MODIFIED BITUMEN COMPARED WITH PG 76 BINDER

2018 ◽  
Vol 80 (4) ◽  
Author(s):  
Ebenezer Akin Oluwasola ◽  
Mohd Rosli Hainin ◽  
Mohd Khairul Idham ◽  
Modupe Abayomi
Keyword(s):  
Rheological Properties ◽  
Vinyl Acetate ◽  
Softening Point ◽  
Ethylene Vinyl Acetate ◽  
Climatic Conditions ◽  
Dynamic Shear ◽  
Modified Bitumen ◽  
Dynamic Shear Rheometer ◽  
Modified Binder

The failures of the flexible pavements are not only caused by harsh climatic conditions prevailing in most of the tropical countries but also due to increase in traffic. The ethylene vinyl acetate (EVA) modification of the bitumen can strengthen the properties of binders and also improve the quality of bitumen used for pavements construction. This paper reports the changes in physical and rheological properties of unaged 80-100 grade bitumen modified with different percentages of EVA and compared with the properties of PG 76 binder. The penetration, softening point and viscosity properties were studied. The rheological properties were measured using dynamic shear rheometer and the test was performed at temperatures ranging from 46 to 76 ⁰C at intervals of 6 ⁰C. It was noted that, after modification, the properties of binders had improved. The results show that 5% EVA content by weight in modified binder is adequate in terms of physical and rheological properties studied. In addition, the properties of 5% EVA modified 80-100 grade bitumen are similar to PG 76 binder.

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.

Real-Time Monitoring of Solar Modules Manufacturing

2020 ◽  
Vol 51 ◽  
pp. 9-13
Author(s):  
Pavel Tšukrejev ◽  
Kaarel Kruuser ◽  
Georgy Gorbachev ◽  
Kristo Karjust ◽  
Jüri Majak
Keyword(s):  
Real Time ◽  
Vinyl Acetate ◽  
Ethylene Vinyl Acetate ◽  
Cross Linking ◽  
Real Time Monitoring ◽  
Time Analysis ◽  
Real Time Analysis

One of the most important steps during manufacturing of solar modules is lamination. This paper focuses on monitoring of behavior of used encapsulant Ethylene/Vinyl-Acetate (EVA) and impact on overall quality of module during lamination. Monitoring is performed by employing external thermocouple sensor inside the lamination chamber as well as by. Real-time analysis of the results helps to predict the quality of final product in terms of ensuring lamination quality in real time and provides possibility to tune the process during manufacturing cycle to achieve the best result of encapsulant cross-linking.

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