Free radical copolymerization of methyl methacrylate and N-2-methyl-4-nitro-phenylmaleimide: Improvement in the Tg of PMMA

Methyl methacrylate based copolymers and terpolymers: Preparation, identification, and plasticizing capability for a poly(methyl methacrylate) used in aviation

“…All peaks conforming to the vinyl protons of the monomers disappeared. The signals were the protons from the methyl group of MMA (δ = 1.08 ppm, h), the methylene group of MMA (CH 2 , δ = 1.98 ppm, g), CH 3 on the MI units (δ = 2.20 ppm, f), OCH 3 on MMA (δ = 3.62 ppm, e), CH on the main‐chain backbone of the MAH and MI units (δ = 3073 ppm, d), and the aromatic ring of MI (δ = 7.22 and 8.20 ppm, c, b, and a) …”

“…The thermal stability of PMMA was improved with the addition of MI as a comonomer . In this study, the thermal properties of the prepared terpolymers were studied by TGA, DTG, and DSC under an argon atmosphere at a heating rate of 5 °C/min.…”

“…The characteristic peaks of the MI units were assigned to imidic carbonyl groups (1782 cm 21 ), ANO asymmetric and symmetric stretching bands (1530 and 1345 cm 21 , respectively), and C@C aromatic stretching (1589 cm 21 ). 26,28,32 All of the compositions with different monomer ratios showed bands that arose from the AC@O groups of the terpolymers (1700-1850 cm 21 ). 33 Should be omitted, the characteristic peak of annular maleic anhydride (O@CAOAC@O, ca.…”

“…The thermal stability of PMMA was improved with the addition of MI as a comonomer. 28 In this study, the thermal properties of the prepared terpolymers were studied by TGA, DTG, and DSC under an argon atmosphere at a heating rate of 5 8C/min. The TGA and DTG diagrams of poly(methyl methacrylate-maleic anhydride-N-2-methyl-4-nitrophenylmaleimide)s [P(MMA-MAH-MI)s] with a constant amount of MI (20%) and different amounts of MMA and MAH are shown in Figure 8(A,B).…”

Crosslinked poly(methyl methacrylate) with perfluorocyclobutyl aryl ether moiety as crosslinking unit: thermally stable polymer with high glass transition temperature

“…[1][2][3][4] However, the glass transition temperature (T g , 100 C) and heat-deformation temperature of PMMA are relatively low so as to limit its applications. 5,6 In order to improve T g and the thermal stability of PMMA, investigators have explored various methods, 3, [7][8][9][10][11][12][13][14][15] including the copolymerization of methyl methacrylate (MMA) with comonomers bearing rigid or bulky groups to overcome the miscibility puzzle, or the formation of a threedimensional network structure by the addition of crosslinking agent. Wilkie et al prepared MMA-DVB crosslinked polymers using divinylbenzene (DVB) as crosslinking agents and the degradation temperature (T d,5% ) of resulting polymers increased from 162 C to 294 C. 12 Kuo et al suggested an approach to raise the T g of PMMA through copolymerization with methacrylamide (MAAM) since hydrogen-bonding interactions exist between these two monomer segments.…”