Synthesis and characterization of butyl acrylate-co-poly (ethylene glycol) dimethacrylate obtained by microemulsion polymerization

Abraham G Alvarado,Martin Rabelero,Jacobo Aguilar,Jorge Flores Mejia,Francisco J Moscoso Sánchez

doi:10.1080/15685551.2020.1739506

Abraham G Alvarado, Martin Rabelero + Show 3 more

Open Access

https://doi.org/10.1080/15685551.2020.1739506

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Abstract

ABSTRACT The synthesis and characterization of copolymers of n-Butyl Acrylate (BA) and Poly(ethylene glycol) dimethacrylate (PEGDMA) were realized by microemulsion. In this synthesis, the relation of PEGDMA 10, 20, 30, 40 and 50% wt with respect to BA was changed. The copolymers obtained were characterized by the determination of conversions (gravimetry), infrared spectroscopy: Fourier transform (FTIR), dynamic light scattering (DLS), thermogravimetry (TGA) and differential scanning calorimetry (DSC). The results confirmed the synthesis of BA-co – PEGDMA copolymers by the identification of characteristic FTIR bands and which determined the glass transition temperature of the copolymers. The conversions were found in the range of 85% to 90%. Within the stability of the produced latex, it was observed that at 10% and 30% wt. of PEGDMA the systems were stable, but when more PEGDMA was added up 40% to 50% wt., the system became unstable. The stability of produced latexes depends on the PEGDMA contents and this must be less than 30% wt.; meanwhile the PEGDMA content greater than 30% wt. leads to unstable latexes, forming clots. Copolymers showed single glass transition temperatures between −53.37°C and −16.58°C, depending on the composition of PEGDMA in the copolymers. Resulting in the different arrangements of units of PEGDMA along in the chain affected the thermal properties of the final copolymers.

Highlights

Nowadays, microemulsion polymerization is an important technique to prepare highly stable latex-containing small particles of less than 100 nm and polymers with molecular weights exceeding one million [1,2]
The scheme of possible reaction between Butyl Acrylate (BA) and Poly (ethyleneglycol) dimethacrylate (PEGDMA) is shown in Scheme 1
The results show that BA/PEGDMA microemulsions are monodisperse nanoemulsions

Summary

Introduction

Microemulsion polymerization is an important technique to prepare highly stable latex-containing small particles of less than 100 nm and polymers with molecular weights exceeding one million [1,2]. The polymeric nanoparticles with complex structures varied, with attractive functions; such as being a different approach for nanoparticle fabrication Example of this, it is a selfassembly-combined copolymer with nanoskiving. The gamma-radiation method generated higher grafting yields, obtaining a maximum of up to 60.5% grafted copolymer, which is much higher than the 15.4% grafting yield obtained using AIBN Another important aspect is that using the chemical method resulted in films with better flexibility than films obtained by radiationinduced graft polymerization. The suggested approach would be to design and synthesize well-controlled PLA-based amphiphilic block copolymers (ABPs); as well as their bio-related applications, including drug delivery, imaging platforms of self-assembled nanoparticles, and tissue engineering of crosslinked hydrogels. The effects of adding the PEGDMA were studied in the copolymers synthesized through conversion (gravimetry), Fourier transform infrared, dynamic light scattering, thermogravimetry and differential scanning calorimetry

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