Preparation, Thermal, and Thermo-Mechanical Characterization of Polymeric Blends Based on Di(meth)acrylate Monomers

Abstract

This study presents the preparation and the thermo-mechanical characteristics of polymeric blends based on di(meth)acrylates monomers. Bisphenol A glycerolate diacrylate (BPA.GDA) or ethylene glycol dimethacrylate (EGDMA) were used as crosslinking monomers. Methyl methacrylate (MMA) was used as an active solvent in both copolymerization approaches. Commercial polycarbonate (PC) was used as a modifying soluble additive. The preparation of blends and method of polymerization by using UV initiator (Irqacure® 651) was proposed. Two parallel sets of MMA-based materials were obtained. The first included more harmless linear hydrocarbons (EGDMA + MMA), whereas the second included the usually used aromatic copolymers (BPA.GDA + MMA). The influence of different amounts of PC on the physicochemical properties was discussed in detail. Chemical structures of the copolymers were confirmed by attenuated total reflection–Fourier transform infrared (ATR/FT-IR) spectroscopy. Thermo-mechanical properties of the synthesized materials were investigated by means of differential scanning calorimetry (DSC), thermogravimetric (TG/DTG) analyses, and dynamic mechanical analysis (DMA). The hardness of the obtained materials was also tested. In order to evaluate the surface of the materials, their images were obtained with the use of atomic force microscopy (AFM).

Synthesis and Spectroscopic Analyses of New Polycarbonates Based on Bisphenol A-Free Components

“…In our previous studies of composites with polycarbonate as a filler, the carbonyl group peak was even narrower. The signal from the carbonyl group was in the range of 1730-1725 cm −1 for all materials [25]. In the present study, this effect was found for all samples except for the polymers: diol E + DPC + benzyltriethylammonium chloride, diol M + DPC + DMAP, dithiol + DPC + DMAP.…”

Selective Distribution of Filler in PMMA/PLA/BN Thermally Conductive Composites: Theoretical Prediction and Experimental Investigation

“…There existed no separation peak after the addition of PLA into PMMA, and with the increase of PLA content the T g of the blends moved toward that of PLA, indicating an acceptable compatibility between PMMA and PLA after melt blending. 26 Meanwhile, it can be seen that the E' for all samples slowly decreased with temperature initially, but subsequently fell sharply around T g , which could be closely associated with the initiation of microscopic Brownian motion (i.e., the phase transition from glassy to rubber state). The E' of the samples reached their maximum values at a PMMA/ PLA ratio of 7:3, suggesting that the stiffness of the material achieved its highest value, which was in accordance with the trend of variation of the tensile strength versus the composition.…”

“…Both E’’ and peak values of tan δ were typical parameters for determining the glass transition temperature ( T g ) of polymeric materials. There existed no separation peak after the addition of PLA into PMMA, and with the increase of PLA content the T g of the blends moved toward that of PLA, indicating an acceptable compatibility between PMMA and PLA after melt blending . Meanwhile, it can be seen that the E’ for all samples slowly decreased with temperature initially, but subsequently fell sharply around T g , which could be closely associated with the initiation of microscopic Brownian motion (i.e., the phase transition from glassy to rubber state).…”

Dental Poly(methyl methacrylate)-Based Resin Containing a Nanoporous Silica Filler

“…Figure 2 b shows FT-IR spectra of the PMMA-based resins with and without fillers. The FT-IR spectrum of the PMMA-based resin had characteristic peaks attributed to PMMA and poly-EGDMA, suggesting that the resin consisted of copoly(MMA/EGDMA) [ 28 ]. The peaks at 2900–3000 cm −1 were attributed to C–H stretching vibrations, 1250–1000 cm −1 to C–O stretching vibrations, and 950–650 cm −1 to C–H bending vibrations.…”