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Free‐radical copolymerization and kinetic treatment of methyl methacrylate with N‐P ‐tolylmaleimide
Author(s) -
Yang Liting,
Liu Yanhong,
Li Yanfang,
Gao Jungang,
Zhang Liucheng,
Jin Riguang
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.13237
Subject(s) - thermogravimetric analysis , copolymer , polymer chemistry , methyl methacrylate , thermal stability , reactivity (psychology) , monomer , glass transition , cyclohexanone , materials science , methacrylate , chemistry , radical polymerization , organic chemistry , polymer , catalysis , medicine , alternative medicine , pathology
The free‐radical copolymerization of methyl methacrylate (MMA) with N ‐ P ‐tolylmalemide (NPTMI) at 77°C in cyclohexanone solution initiated by AIBN was studied. The copolymer composition was calculated from the nitrogen content estimated by the Mico–Kijedldahl's method and by elemental analysis. The reactivity ratios have been calculated by Fineman and Ross method. The monomer reactivity ratios were r NPTMI = 1.24, r MMA = 2.1. The glass transition temperature ( T g ) of the copolymers were determined by torsion braid analysis (TBA). The thermal stability was determined by thermogravimetric analysis (TGA). T 50 , temperature at which the weight loss reaches 50%, was abstained. The results showed that the M n and M w increased, whereas the NPTMI feed content increased. The T g and T 50 increased dramatically. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 91: 867–870, 2004