Beta Meg Invest Srl

Bucharest, Romania

Beta Meg Invest Srl

Bucharest, Romania
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Rusen E.,Polytechnic University of Bucharest | Mocanu A.,Polytechnic University of Bucharest | Rizea F.,Polytechnic University of Bucharest | Diacon A.,Polytechnic University of Bucharest | And 4 more authors.
Materiale Plastice | Year: 2013

Poly(ethylene terephtalate) (PET), recycled from post-consumer bottles was depolymerized by glycolysis process using diethylene glycol (DEG) in the presence of zinc acetate catalyst. The glycolized products were mainly represented by monomer and dimer units. After a relatively long reaction time (over 2 h), an equilibrium was achieved between the two species. Considering the importance of the next steps, in attaining unsaturated polyesters with excellent mechanical properties, this study was concentrated on the identification and characterization of glycolysis reaction equilibrium phase. The evolution of the depolymerization reaction was investigated by the viscosity procedure, which was compared and found to be in good agreement with the functional analysis method.


Rusen E.,Polytechnic University of Bucharest | Mocanu A.,Polytechnic University of Bucharest | Rizea F.,Polytechnic University of Bucharest | Diacon A.,Polytechnic University of Bucharest | And 4 more authors.
Materiale Plastice | Year: 2013

The chemical recycling of poly(ethylene terephtalate) PET using a unconventional method employing microwave radiation was studied. The reaction parameters were varied in order to study their influence. The reactivity of several glycols was compared and results showed consistency with conventional solvolysis methods. The dissolution of PET polymer into the glycol solution is one of the key parameters in determining the reaction time. The modification of the microwave field power afforded a 50% reduction of the reaction time. This method presents certain advantages compared to conventional glycolysis methods such as: energy and time saving through a rapid and a more uniform heating capacity, leading to a complete depolymerization in the presence of the catalyst.


Rusen E.,Polytechnic University of Bucharest | Mocanu A.,Polytechnic University of Bucharest | Rizea F.,Polytechnic University of Bucharest | O. Stanescu P.,Polytechnic University of Bucharest | And 3 more authors.
Materiale Plastice | Year: 2014

Poly(ethylene terephthalate) PET was subject to a glycolysis process using diethylene glycol (PET/DEG = 1/1 molar ratio) and zinc acetate as trans-esterification catalyst. An unsaturated polyester resin was then prepared using the glycolysis product and maleic anhydride. The molecular weights of glycolysed PET products and polyester resin were investigated using gel permeation chromatography (GPC) analysis. A cross-linking reaction of the unsaturated polyester resin was performed in the presence of styrene (different amounts) at 80°C. The compression and impact strength/resistance properties of the cured resins were determined.


Rusen E.,Polytechnic University of Bucharest | Mocanu A.,Polytechnic University of Bucharest | Mocanu A.,Beta Meg Invest Srl | Fiat D.,ICECON S.A | And 3 more authors.
Materiale Plastice | Year: 2015

The aim of the current study was to obtain materials presenting a large scale of applications (polyurethane adhesives and foams) through a one-pot synthesis starting from post-consumer poly(ethylene terephthalate) (PET) bottles. The PET depolymerization was carried out using diethylene glycol (DEG) and catalyst (zinc acetate) in a microwave reactor. Using the obtained depolymerization mixture, different polyurethane adhesives or foams formulations were developed. The adhesives mechanical properties were tested affording samples with tensile shear resistance suitable for commercialization. The polyurethane foams testing confirmed the obtaining of rigid structure with good thermal insulation properties.

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