Study of methyl methacrylate—acrylamide copolymerization system in cyclohexanone in the absence of conventional radical initiator

Talpur, Mir Munsif Ali; Oracz, Paweł; Kaim, Andrzej

doi:10.1016/0032-3861(96)00141-3

Cited by 14 publications

(15 citation statements)

References 26 publications

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“…Previous studies of acrylates and methyl methacrylate in cyclohexanone and xylene10, 36 have shown that the rate of spontaneous initiation in nitrogen increases with the initial monomer concentration. Moreover, the absence of impurity‐based, end‐group initiating species in ethyl acrylate and n BA polymer samples taken from batch operations under nitrogen bubbling and analyzed via ESI–FTMS has been reported 11.…”

Section: Resultsmentioning

confidence: 94%

Experimental study of the spontaneous thermal homopolymerization of methyl andn‐butyl acrylate

Srinivasan

Kalfas

Petkovska

et al. 2010

J of Applied Polymer Sci

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This article presents an experimental study of the spontaneous thermal homopolymerization of methyl acrylate (MA) and n-butyl acrylate (nBA) in the absence of any known added initiators at 120 and 140 C in a batch reactor. The effects of the solvent type, oxygen level, and reaction temperature on the monomer conversion and polymer average molecular weights were investigated. Three solvents, dimethyl sulfoxide (DMSO; polar, aprotic), cyclohexanone (polar, aprotic), and xylene (nonpolar) were used. The spontaneous thermal polymerization of MA and nBA in DMSO resulted in a lower conversion and higher average molecular weights in comparison to polymerization in cyclohexanone and xylene under the same conditions. The highest final conversion of both monomers was obtained in cyclohexanone. The high polymerization rate in cyclohexanone was most likely due to an additional initiation mechanism where cyclohexanone complexed with the monomer to generate free radicals. Bubbling air through the mixture led to a higher monomer conversion during the early stage of the polymerization and a lower polymer average molecular weight in xylene and cyclohexanone; this indicated the existence of a distinct behavior between the air-and nitrogen-purged systems. Matrixassisted laser desorption/ionization time-of-flight analysis of the polymer samples taken from nitrogen-bubbled batches did not reveal fragments from initiating impurities. On the basis of the identified families of peaks, monomer self-initiation is suggested as the principal mode of initiation in the spontaneous thermal polymerization of MA and nBA at temperatures above 100 C.

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Section: Resultsmentioning

confidence: 94%

Experimental study of the spontaneous thermal homopolymerization of methyl andn‐butyl acrylate

Srinivasan

Kalfas

Petkovska

et al. 2010

J of Applied Polymer Sci

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“…37 Due to the number of different signals appearing in the 2 -1 ppm region, it is difficult to determine the existence of crosscorrelations between proton signals in the main chain arising from the different repeating units of AMPS (1H, CH 2 ), 10-MeOAzB, and MMA (CH 3 , CH 2 ), by using 2D correlation 10 NMR, 1 H-COSY, see Figure ESI2. Considering that acrylamides show smaller reactivity ratios than methacrylates in radical initiated copolymers [41][42][43][44] , we cannot rule out that our 10-MeOAzB/AMPS/MMA terpolymers may contain tapered chains initiated by polymerisation of methacrylate units, to which AMPS groups attach, following a statistical distribution. 1(a) and 1(b), respectively.…”

Section: Composition and Molecular Weight Analysismentioning

confidence: 99%

Ionically conducting and photoresponsive liquid crystalline terpolymers: Towards multifunctional polymer electrolytes

Vanti

Alauddin

Zaton

et al. 2018

European Polymer Journal

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We have prepared a series of new ionically conducting polymer electrolytes consisting of side-chain liquid crystal terpolymers with mesogenic azobenzenes, sulfonic acid groups and methyl methacrylate. The poly[10-(4-methoxyazobenzene-4'-oxy)decyl methacrylate]-copoly[2-acrylamido-2-methyl-1-propanesulfonic acid]-co-poly[methyl methacrylate]s, 10-MeOAzB/AMPS/MMA terpolymers, were synthesised by a one-pot conventional radical polymerisation. All samples were characterised by NMR, GPC/SEC, FT-IR, POM, XRD, DSC, UV-visible spectrophotometry and EIS. The terpolymers have light responsive properties, and exhibit liquid crystallinity over a wide range of compositions. Above a certain threshold of AMPS content, the 10-MeOAzB/AMPS/MMA terpolymers exhibit ionic conductivities in the 10-8-10-4 S cm-1 range, with signs of decoupling of ionic mobility from segmental motions of the polymer.

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“…The reactivity ratio of AAm (r 1 ) and St (r 2 ) are calculated by the Kelen and TŸdšs (KT) method [19] and the Finemann and Ross (FR) method [20]. As expected [12,13] ketones did not proceed under the same conditions. As expected [12,13] ketones did not proceed under the same conditions.…”

Section: Results Of Copolymerization Of Aam With St In the Presence Ofmentioning

confidence: 59%

“…As shown in Scheme 1, the reaction mechanism involving the transfer of hydrogen radical from these compounds to the monomers, was originally proposed by M. Imoto [3][4][5]. Kaim et al They have reported the initiating activity of these compounds in the copolymerization systems of MMA with styrene (St) [10][11][12] and AAm with St [13]. Kaim et al They have reported the initiating activity of these compounds in the copolymerization systems of MMA with styrene (St) [10][11][12] and AAm with St [13].…”

Section: Introductionmentioning

confidence: 99%

Study on Copolymerization of Acrylamide With Styrene Initiated by Methyl Ethyl Ketone and Its Derivatives in Comparison With Conventional Radical Initiator

Zhong

Ishifune

Yamashita

2000

Journal of Macromolecular Science, Part A

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Copolymerization of acrylamide (AAm) with styrene (St) was carried out in the presence of methyl ethyl ketone (MEK), methyl isopropyl ketone (MIK) and t-butyl methyl ketone (tBMK) without any conventional initiator in tetrahydrofuran (THF) at 60¡C. The copolymerization of AAm with St proceeded readily in the presence of the MEK, MIK, and tBMK, while no copolymerization of AAm with St proceeded in the absence of these ketones under the same conditions and no homo-polymerization of St proceeded even in the presence of the ketones. The reactivity ratio of monomer AAm (r 1 ) is smaller than that of St (r 2 ) in all of the copolymerization systems, and increases as the order: MEK < MIK < tBMK. The conversion of the copolymerizations increases as the same order described above. The interaction

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Study of methyl methacrylate—acrylamide copolymerization system in cyclohexanone in the absence of conventional radical initiator

Cited by 14 publications

References 26 publications

Experimental study of the spontaneous thermal homopolymerization of methyl andn‐butyl acrylate

Experimental study of the spontaneous thermal homopolymerization of methyl andn‐butyl acrylate

Ionically conducting and photoresponsive liquid crystalline terpolymers: Towards multifunctional polymer electrolytes

Study on Copolymerization of Acrylamide With Styrene Initiated by Methyl Ethyl Ketone and Its Derivatives in Comparison With Conventional Radical Initiator

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