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Synthesis and thermal degradation of poly( n ‐butylisocyanate) modified by 1,3‐propanesultone
Author(s) -
Dereszewska Alina,
Olayo Roberto,
Cardoso Judith
Publication year - 2003
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.13077
Subject(s) - activation energy , polymer chemistry , polymer , intrinsic viscosity , degradation (telecommunications) , thermal stability , fourier transform infrared spectroscopy , materials science , stoichiometry , thermal , viscosity , sulfonate , kinetics , chemical engineering , chemistry , organic chemistry , thermodynamics , composite material , telecommunications , physics , sodium , quantum mechanics , computer science , engineering
Abstract Poly( n ‐butylisocyanates) were synthesized by anionic homopolymerization with the addition of sulfonate groups in the termination stage. Two types of functional polymers were obtained from different quantities of added 1,3‐propanesultone (PrS). When a stoichiometric proportion of sultone is added, the reaction with poly( n ‐butylisocyanate) renders a mix of a nonfunctionalized (PBIC) and a telechelic polymer (PBICT). In the presence of an excess of PrS, the proportion of end‐functionalized chains was higher, and a significant change in their thermal properties was observed. Polymers were characterized by FTIR and NMR, and measurements of intrinsic viscosity were made. Thermal degradation of the polymers was studied under nitrogen atmosphere for various heating rates. The kinetic parameters such as the activation energy and the reaction order were determined by using Ozawa's method. Thermal degradation analyses showed that the degradation processes depend strongly on the concentration of functional groups. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 90: 3594–3601, 2003