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Copolymerization of N ‐phenylmaleimide with 2‐hydroxyethyl and ethyl methacrylates
Author(s) -
Şenel Serap,
Rzaev Zakir M. O.,
Pişkin Erhan
Publication year - 2003
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/pi.1117
Subject(s) - copolymer , methacrylate , monomer , polymer chemistry , azobisisobutyronitrile , reactivity (psychology) , imide , thermal stability , materials science , chemistry , radical initiator , polymer , organic chemistry , medicine , alternative medicine , pathology
Radical copolymerization of N ‐phenylmaleimide (PhMI) with 2‐hydroxyethyl methacrylate (HEMA) and ethyl methacrylate (EMA) was studied. Synthesis of copolymers was carried out in p ‐dioxane at 65 °C with 2,2′‐azobisisobutyronitrile as the initiator. Copolymer compositions were calculated by the elemental analysis and 1 H NMR spectroscopy methods. Monomer reactivity ratios for the studied monomer pairs were determined using Kelen–Tüdös and non‐linear regression methods. PhMI monomer was found to have substantially different copolymerization constants in the radical copolymerization of the two monomer systems. Poly(PhMI‐ co ‐HEMA) possessed higher values of intrinsic viscosity and higher thermal stability, as well as showing specific melting endo‐peaks in the DSC curves. These observations were explained by the effect of H‐bonding between hydroxyl and imide groups with the formation of complexed macromolecular structures. Copyright © 2003 Society of Chemical Industry