Optimized synthesis of highly reactive UV-curable hyperbranched polyester acrylates

Arnaud, Sacha Pérocheau; Hashemi, Payam; Mischnick, Petra; Robert, Tobias

doi:10.1007/s11998-019-00247-w

Cited by 10 publications

(1 citation statement)

References 34 publications

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“…The viscosity of unsaturated polyester resins is a key parameter that determines the possible applications of these materials. It is a function of the resins' molecular weight [35], functional groups such as terminal -OH groups, or intermolecular -H bonds [11], and can be modified with the addition of reactive diluents [36,37]. In our work, the viscosity of the obtained resins was measured at five different temperatures, applying a constant shear rate of 100 s −1 .…”

Section: Viscosity Measurementsmentioning

confidence: 97%

Synthesis and Characterization of Unsaturated Succinic Acid Biobased Polyester Resins

et al. 2021

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Polymers from renewable feedstocks are receiving increasing attention as the awareness about environmental issues derived from petroleum exploitation and waste accumulation is growing. With unsaturated polyester resins being one of the most used classes of polymers worldwide, the utilization of biobased monomers for manufacturing is more relevant than ever. In the present work, succinic acid, one of the most promising biobased building blocks, was incorporated in the structure of the resins in question to increase their biobased content. By reacting with ethylene glycol (EG) or poly(ethylene glycol) and maleic anhydride (MA) at several molar rations, unsaturated polyester resins (UPRs) were prepared. Their synthesis was evaluated by a variety of spectroscopical techniques, and their rheological properties made use of the reactive diluent mandatory for facilitating processing. Thus, in a second stage acrylic acid (AA) was used as cross-linking agent in the present of initiators and accelerators producing thermosetting resins. Differential scanning calorimetry (DSC) was employed to screen the cross-linking procedure, whereas with X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectroscopy (FTIR) it was proven that thermosetting resins were prepared. The thermal stability of the cured materials was evaluated by thermogravimetric analysis (TGA).

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