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Characterization of methacrylic polymers by calorimetry and infrared analyses
Author(s) -
Mansur Claudia R. E.,
Monteiro Elisabeth E. C.
Publication year - 1998
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/(sici)1097-4628(19980418)68:3<345::aid-app1>3.0.co;2-j
Subject(s) - polymer chemistry , copolymer , thermogravimetry , differential scanning calorimetry , methacrylate , methyl methacrylate , fourier transform infrared spectroscopy , methacrylic acid , materials science , polymer , titration , infrared spectroscopy , viscometer , calorimetry , chemistry , organic chemistry , chemical engineering , inorganic chemistry , viscosity , physics , engineering , composite material , thermodynamics
Methyl methacrylate–methacrylic acid (MMA–MAA) copolymers, prepared by the action of concentrated nitric acid (65% HNO 3 ) on methyl methacrylate in absence of other reagents, were characterized using calorimetry (DSC) and infrared (FTIR) analyses. DSC curves of ester/acid copolymers suggested the anhydride formation at ∼ 200°C, which was corroborated by thermogravimetry (TG). This structure was assigned by FTIR spectra. The results obtained by DSC data are in good agreement with the hydrolysis degree of the MMA–MAA copolymers obtained from chemical titration. The molecular weight of the copolymers were estimated by viscometry. © 1998 John Wiley & Sons, Inc. J Appl Polym Sci 68:345–354, 1998