A methacrylate monomer bearing nitro, aryl, and hydroxyl side groups: Homopolymerization, characterization, dielectric, and thermal degradation behaviors

Abstract

2-Hydroxy-3-(4-nitrophenoxy)propyl methacrylate (HNPPMA) monomer was synthesized. The poly(HNPPMA) was prepared by free radical polymerization (FRP) method. The characterization of poly(HNPPMA) was carried out using FT-IR, NMR, differential scanning calorimetry, and GPC techniques. The thermal stability and degradation behavior of this polymer have been studied by using thermogravimetry (TG), GC-MS, NMR, and FT-IR. The results were in comparison to poly[2-hydroxy-3-(1-naphtyloxy)propyl methacrylate] sample with a-naphtyloxy side group prepared by the same method in the our previous study. The effect of thermal activation on non-isothermal decomposition kinetics of poly(HNPPMA) was investigated using thermogravimetric analysis according to Flynn-Wall-Ozawa method. The dielectric measurements of poly(HNPPMA) and doped with europium(III)chloride (EuCI 3 ) were investigated by impedance analyzer technique in range of 10-4000 Hz frequency by depending on the alternating current conductivities. The mode of thermal degradation including formation of the main products of poly(HNPPMA) degraded from ambient temperature to 500 8C was identified. S8, the cold ring fraction (CRF) was collected from room temperature to 500 8C. The structure of the degradation products has also been studied depending on the GC-MS analysis. The thermal degradation mechanism for poly(HNPPMA) with radical degradation processes thought to dominate at high temperature was proposed based on GC/MS, NMR, FT-IR, and taking into account the new products and differences in stability. V C 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43925.

A Study on Copolymer Systems of Styrene with Diethanolamine Side Group and Methyl Methacrylate

“…As the polymers are stationary and fixed under the glass transition temperature, when an electric field is applied to the polymer, the polymer chain movements increase as the polymer free volumes increase the glass transition temperature and a space occurs. In this case, the dielectric constant and dielectric losses factor increase by the temperature [3,23,25].…”

“…When the electric field is applied, moving surface loads occur on the surface of copolymers. As the electric field is applied, these loads cause a superficial polarization by cumulating on the dielectric surface [22,23]. In this case, the increase in the frequency causes a decrease in the dielectric constant.…”

Preparation and Characterization of Styrene Bearing Diethanolamine Side Group, Styrene Copolymer Systems, and Their Metal Complexes

“…At higher frequencies, an electron in the molecular orbital is stimulated to a higher energy level, in which the energy is spin connected and the electrons in the excited state either lead to a neighboring molecule or return to the base. But electrons prefer to be at the fundamental energy level, in which the conductivity increases with increasing frequency [45].…”

Synthesis, structural and thermal characterizations, dielectric properties and in vitro cytotoxic activities of new 2,2,4,4-tetra(4′-oxy-substituted-chalcone)-6,6-diphenylcyclotriphosphazene derivatives

“…The dielectric constant, dielectric factors, and ac conductivity of 3-10 were calculated with the help of the following Eqs. (1), (2), and (3), respectively (Singh and Gupta 1998;Biryan and Demirelli 2016). As for the obtained compounds, the results of the dielectric constant (ε′), dielectric loss (ε″), and conductivity (logσ) that were measured against the frequency are given in Fig.…”