News Update on Methacrylic Acid Research: Sep – 2019

Stability of Aqueous α‐Al2O3 Suspensions with Poly(methacrylic acid) Polyelectrolyte

Stability of liquid α‐Al2O3 suspensions with Na+ salt of poly(methacrylic acid) (PMAA‐Na) electrolyte was studied as a perform of pH. At a given pH, the transition from the flocculated to the distributed state corresponded to the surface assimilation saturation limit of the powders by the PMAA. because the pH was cut, the surface assimilation saturation limit hyperbolic till quality and charge neutralization of the PMAA was approached. The crucial quantity of PMAA needed to realize stability is made public in a very stability map. [1]

Amphiphilic Janus Micelles with Polystyrene and Poly(methacrylic acid) Hemispheres

We describe the synthesis and therefore the answer properties of Janus micelles containing a polybutadiene (PB) core and a compartmented corona consisting of a poly(methacrylic acid) (PMAA) and a phenylethylene (PS) hemisphere. The Janus micelles were obtained via cross-linking the center block of a microphase-separated PS-block-PB-block-PMMA triblock polymer within the bulk state, followed by alkalic chemical reaction of the poly(methyl methacrylate) (PMMA) organic compound teams. Results of visible light correlation chemical analysis, field flow fractionation, lightweight scattering, refrigerant transmission microscopy, scanning microscopy, and scanning force research indicate that higher than a vital aggregation concentration of regarding zero.03 g/L spherical supermicelles are shaped from regarding thirty PS-PMAA micelles in solution within the presence of NaCl. [2]

Graft copolymerization of methacrylic acid onto carboxymethyl chitosan

Carboxymethyl chitosan (CMCTS) was ready and characterised by FTIR, 1H NMR, and elemental analysis. The graft copolymerization of acid (MAA) onto CMCTS mistreatment ammonia persulfate (APS) as associate instigator was allotted in associate solution. proof of graft was obtained by comparison of FTIR spectra of CMCTS and also the grafted polymer yet as solubility characteristics of the product. the consequences of APS, MAA, reaction temperature and time on graft copolymerization were studied by determinant the graft parameters like graft proportion and graft potency. With keeping different conditions constant, the optimum conditions were shown as following: [APS]=8 mmol/l, [MAA]=2.4 mol/l, reaction temperature=60–70 °C, reaction time=120 min. [3]

A study on template effects using irregular porous isotactic poly(methyl methacrylate) films constructed with syndiotactic rich poly(methacrylic acid) and isotactic poly(methyl methacrylate)

To investigate the stereocomplex formation potency with numerous syndiotactic-poly(methacrylic acids) (st-PMAAs) when the extraction of the syndiotactic-rich PMAA from stereocomplex film, the low syndiotacticity of PMAA (rr=78%) was accustomed prepare irregular isotactic poly(methyl methacrylate) (it-PMMA)/st-PMAA (rr=78%) stereocomplex skinny films on substrates. The resultant irregular porous it-PMMA skinny films showed effective incorporation of st-PMAA (rr=78 and 96%), suggesting a structural arrangement of the it-PMMA main chain. [4]

Preparation and Characterization of Methacrylic Acid-based Molecularly Imprinted Polymer as a New Adsorbent for Recognition of 1,4-dihydroxybenzene

This article presents the primary example of consecutive rumored model removal procedure in molecularly imprinted polymers (MIPs) victimization UV-spectrophotometer. chemical action was achieved in an exceedingly glass tube containing one,4-dihydroxybenzene (DHB) model molecule, 2-methylpropenoic acid (MAA), glycol dimethacrylate (EGDMA), azobisisobutyronitrile (AIBN). The compound matrix obtained was ground and also the model molecule was faraway from polymer particles by leach with methanol/acetic acid, that leaves cavities within the compound material. The compound material each before and when leach was characterised by Fourier rework infrared spectrographic analysis, Scanning microscopy, X-ray diffraction, and Brunauer-Emmett-Teller model. [5]

Reference

[1] CESARANO III, J.O.S.E.P.H., Aksay, I.A. and Bleier, A., 1988. Stability of aqueous α‐Al2O3 suspensions with poly (methacrylic acid) polyelectrolyte. Journal of the American Ceramic Society, 71(4), pp.250-255. (Web Link) (Web Link)

[2] Erhardt, R., Zhang, M., Böker, A., Zettl, H., Abetz, C., Frederik, P., Krausch, G., Abetz, V. and Müller, A.H., 2003. Amphiphilic Janus micelles with polystyrene and poly (methacrylic acid) hemispheres. Journal of the American Chemical Society, 125(11), pp.3260-3267. (Web Link)

[3] Sun, T., Xu, P., Liu, Q., Xue, J. and Xie, W., 2003. Graft copolymerization of methacrylic acid onto carboxymethyl chitosan. European Polymer Journal, 39(1), pp.189-192. (Web Link)

[4] A study on template effects using irregular porous isotactic poly(methyl methacrylate) films constructed with syndiotactic rich poly(methacrylic acid) and isotactic poly(methyl methacrylate)
Masumi Maegawa, Hiroharu Ajiro, Daisuke Kamei & Mitsuru Akashi
Polymer Journal volume 45, pages 898–903 (2013) (Web Link)

[5] N. Awokoya, K., O. Oninla, V., T. Adeleke, I. and O. Babalola, J. (2018) “Preparation and Characterization of Methacrylic Acid-based Molecularly Imprinted Polymer as a New Adsorbent for Recognition of 1,4-dihydroxybenzene”, International Research Journal of Pure and Applied Chemistry, 16(2), pp. 1-11. doi: 10.9734/IRJPAC/2018/38586. (Web Link)