Pressure-induced polymerization of phenoxyethyl acrylate

Abstract

Polymerization of phenoxyethyl acrylate was induced without catalyst or initiators by the application of hydrostatic pressure at elevated temperature. Broadband dielectric and infrared spectroscopy were employed to follow the course of the reaction, which reached a degree of conversion of 60%. The structure of the obtained polymer was determined from density functional theory calculations.

Polymer–chalcogenide glass nanocomposites for amplitude–phase modulated optical relief recording

“…Such process was supported by measurements of FTIR-ATR spectra in pure monomers and Similar data were obtained for other nanocomposites from Table 1. FTIR-ATR spectra of the samples, obtained from a mixture of monomers in composite 14 (Table 1) without ChG NPs correspond with literature data [17][18][19][20][21][22] for urethane polymers and polymers with phenyl fragment. Characteristic wide band at 3350 cm −1 corresponds to the stretching vibrations of NH-groups (Amide A) and other bands at 1710 cm −1 (Amide I), 1540 cm −1 (Amide II), 1300-1250 cm −1 (Amide III) as well as 1220 cm −1 (ν(C-O)) and strong band at 1150 cm −1 (ν asym (O-C-O)).…”

Pressure-Induced Polymerization of Acrylic Acid: A Raman Spectroscopic Study

“…Finally, since earlier studies by Bini and co-workers have established the important role of photon activation in the pressure-induced polymerization of various monomers, ,− it would be of interest to investigate the effect of excitation with different photoenergies on the transition pressures as well as on the nature of the retrieved polymer product of acrylic acid. Furthermore, spectral features involving OH stretching often provide valuable information on the O−H···O hydrogen-bonding interactions.…”

“…As intermolecular interactions can be significantly tuned under pressure, monomers may undergo structural transitions to phases that are more favorable for polymerization via new reaction pathways producing novel properties that are distinct from those obtained using conventional synthetic methods . The earliest pressure-induced polymerization studies of several simple monomers such as acrylamide, p -phenylstyrene, potassium p -styrenesulphonate, and so forth have been reported by Bradbury et al More recently, Bini and co-workers have reported pressure-induced polymerization of ethylene, butadiene, phenoxy ethyl acrylate, isoprene, acetylene, propene, and so forth using pressure and optical “catalysis”. ,− The nature of pressure-induced polymeric forms was found to depend upon the applied pressure, the transition kinetics, and the additional optical excitations. In the case of butadiene, for instance, pressure-induced dimerization was found to occur at pressures above 0.7 GPa.…”

High-temperature-pressure Polymerized Resin-infiltrated Ceramic Networks

“…Furthermore, monomer polymerization leads to volume shrinkage and internal stress (Ferracane, 2005; Park and Ferracane, 2006) and, in the case of a rigid sintered network, could lead to interfacial debonding between polymer and ceramic network. Polymerization under HP could limit shrinkage by reducing free volume (Brosh et al , 2002; Kaminski et al , 2008; Kwiatkowski et al , 2008; Schettino et al ., 2008) and could also limit the development of internal stress (Sadoun, 2011).…”