Extruded poly(ethylene-co-octene)/fly ash composites – value added products from an environmental pollutant

2012 ◽  
Vol 19 (3) ◽  
Author(s):  
S. Anandhan ◽  
S. Madhava Sundar ◽  
T. Senthil ◽  
A. R. Mahendran ◽  
G. S. Shibulal
2021 ◽  
Author(s):  
Medhat S. Farahat Khedr

Abstract The glycolysis products of polyethylene terephthalate (PET) waste represent a potential source for many value-added products that contain terephthalate repeating units in their backbones. Terephthalate repeating units were not attained directly from terephthalic acid due to its high melting point in addition to its tendency to sublime before it reacts. Glycolysis of PET provides an excellent solution for recycling polymer waste and constitutes a substantial starting material for manufacturing materials with high mechanical stress, such as unsaturated polyesters and polyurethane products. In this study, PET was first depolymerized by glycolysis, and glycolyzed products were then dimerized by reaction with toluene di-isocyanate TDI with half equivalence of their hydroxyl groups for the purpose of inserting urethane blocks into the oligomer structure. The remaining half equivalence of terminal hydroxyl groups was modified into acrylate groups by an acrylation reaction. The acrylated oligo urethane ester products were crosslinked with different co-monomers and tested for UV curability and mechanical properties, and they showed outstanding results.


2010 ◽  
Vol 6 (5) ◽  
pp. 787-793 ◽  
Author(s):  
Vidya S. Batra ◽  
Anna Ria Varghese ◽  
Pooja Vashisht ◽  
Malini Balakrishnan

Author(s):  
M. Mercedes Maroto-Valer ◽  
Yinzhi Zhang ◽  
Zhe Lu ◽  
John M. Andrésen ◽  
Harold H. Schobert

2018 ◽  
Vol 28 (5) ◽  
pp. 1681-1684
Author(s):  
Georgi Toskov ◽  
Ana Yaneva ◽  
Stanko Stankov ◽  
Hafize Fidan

The European Commission defines the bioeconomy as "the production of renewable biological resources and the conversion of these resources and waste streams into value added products, such as food, feed, bio-based products and bioenergy. Its sectors and industries have strong innovation potential due to their use of a wide range of sciences, enabling and industrial technologies, along with local and implied knowledge." The Bulgarian food industry faces a lot of challenges on the local and national level, which have direct influence on the structure of the production companies. Most of the enterprises from the food sector produce under foreign brands in order to be flexible partners to the large Bulgarian retail chains. The small companies from the food sector are not able to develop as an independent competitive producer on the territory of their local markets. This kind of companies rarely has a working strategy for positioning on new markets. In order to consolidate their already built positions for long period of time, the producers are trying to optimize their operations in a short term. However, the unclear vision of the companies for the business segment does not allow them to fully develop. Tourism in Bulgaria is a significant contributor to the country's economy.


2020 ◽  
Vol 4 (7) ◽  
pp. 3726-3731
Author(s):  
Fenghui Ye ◽  
Jinghui Gao ◽  
Yilin Chen ◽  
Yunming Fang

Electroreduction of CO2 into value-added products is a promising technique in which the structure of the catalyst plays a crucial role.


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