Premium
Synthesis, characterization and thermal degradation of poly[2‐(3‐ p ‐bromophenyl‐3‐methylcyclobutyl)‐2‐hydroxyethylmethacrylate]
Author(s) -
Demirelli Kadir,
Coşkun Mehmet
Publication year - 1999
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/(sici)1097-0126(199912)48:12<1244::aid-pi292>3.0.co;2-w
Subject(s) - depolymerization , monomer , thermogravimetry , polymer chemistry , glass transition , polymer , materials science , thermal stability , degradation (telecommunications) , methacrylic acid , fourier transform infrared spectroscopy , chemistry , organic chemistry , chemical engineering , inorganic chemistry , telecommunications , computer science , composite material , engineering
In this work, 2‐(3‐ p ‐bromophenyl‐3‐methylcyclobutyl)‐2‐hydroxyethylmethacrylate (BPHEMA) [monomer] was synthesized by the addition of methacrylic acid to 1‐epoxyethyl‐3‐bromophenyl‐3‐methyl cyclobutane. The monomer and poly(BPHEMA) were characterized by FT‐IR and [ 1 H] and [ 13 C]NMR. Average molecular weight, glass transition temperature, solubility parameter, and density of the polymer were also determined. Thermal degradation of poly[BPHEMA] was studied by thermogravimetry (TG), FT‐IR. Programmed heating was carried out at 10 °C min −1 from room temperature to 500 °C. The partially degraded polymer was examined by FT‐IR spectroscopy. The degradation products were identified by using FT‐IR, [ 1 H] and [ 13 C]NMR and GC‐MS techniques. Depolymerization is the main reaction in thermal degradation of the polymer up to about 300 °C. Percentage of the monomer in CRF (Cold Ring Fraction) was estimated at 33% in the peak area of the GC curve. Intramolecular cyclization and cyclic anhydride type structures were observed at temperatures above 300 °C. The liquid products of the degradation, formation of anhydride ring structures and mechanism of degradation are discussed. © 1999 Society of Chemical Industry