Synthesis of Styrene/Maleimide Copolymers and Physical Properties Thereof

Moore, Eugene R.; Pickelman, Dale M.

doi:10.1021/i300024a602

Cited by 24 publications

(8 citation statements)

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“…The maximum power also increases at higher amount of MA, indicating that higher viscosities are caused by the interactions between larger amounts of ammonolyzed MA. The observation of a high‐viscosity regime agrees with Moore and Pickelman28 who imidized SMA in presence of gaseous NH 3 and attributed the increase in viscosity to intermolecular polar association of amic‐acid intermediates during ammonolysis. The formation of an intermediate viscous phase implies limitations on the maximum solid content during reaction.…”

Section: Resultssupporting

confidence: 89%

Synthesis and characterization of imidized poly(styrene‐maleic anhydride) nanoparticles in stable aqueous dispersion

Samyn

Deconinck

Schoukens

et al. 2010

Polymers for Advanced Techs

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Organic nanoparticles are synthesized by partial imidization of high-molecular weight styrene(maleic-anhydride) with 26 to 34 mol% maleic anhydride, in aqueous environment and presence of ammonium hydroxide. The nanoparticle dispersions have a maximum solid content of 35 wt% and good stability that critically depends on the ratio of imidized and ammonolyzed maleic anhydride moieties. The deprotonated residual maleic anhydride moieties provide dispersion stability at pH > 4, while protonation at pH < 4 causes nanoparticle sedimentation. After presentation of the synthesis conditions, the imidization reaction is characterized by FT-IR and Raman spectroscopy, followed by thermal analysis (TGA, DSC), and morphological characterization (DLS, SEM, TEM, AFM). The reaction conditions were optimized by physical characterization of various dispersions, and finally nanoparticles could be obtained with a maximum degree of imidization of 77% in dispersed conditions, or 90 to 95% after drying that are favorable for coating applications.

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Section: Resultssupporting

confidence: 89%

Synthesis and characterization of imidized poly(styrene‐maleic anhydride) nanoparticles in stable aqueous dispersion

Samyn

Deconinck

Schoukens

et al. 2010

Polymers for Advanced Techs

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“…Glass transition temperature ( T g ) is one of the basic physical parameters of synthetic polymers. Both molecular weights (particularly in the low MW range) and chain topology can considerably affect T g values 75–79. Typical DSC thermograms of poly(PMMA‐ alt ‐PNIPAM) alternating copolymer brush as well as alkynyl ‐PNIPAM 24 and poly (PMMA‐ alt ‐VBA) precursors were shown in Figure 4.…”

Section: Resultsmentioning

confidence: 99%

Synthesis of amphiphilic copolymer brushes possessing alternating poly(methyl methacrylate) and poly(N‐isopropylacrylamide) grafts via a combination of ATRP and click chemistry

Yin

Líu

et al. 2009

J. Polym. Sci. A Polym. Chem.

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We report on the synthesis of well‐defined amphiphilic copolymer brushes possessing alternating poly(methyl methacrylate) and poly(N‐isopropylacrylamide) grafts, poly(PMMA‐alt‐PNIPAM), via a combination of atom transfer radical polymerization (ATRP) and click reaction (Scheme ). Firstly, the alternating copolymerization of N‐[2‐(2‐bromoisobutyryloxy)ethyl]maleimide (BIBEMI) with 4‐vinylbenzyl azide (VBA) affords poly(BIBEMI‐alt‐VBA). Bearing bromine and azide moieties arranged in an alternating manner, multifunctional poly(BIBEMI‐alt‐VBA) is capable of initiating ATRP and participating in click reaction. The subsequent ATRP of methyl methacrylate (MMA) using poly(BIBEMI‐alt‐VBA) as the macroinitiator leads to poly(PMMA‐alt‐VBA) copolymer brush. Finally, amphiphilic poly(PMMA‐alt‐PNIPAM) copolymer brush bearing alternating PMMA and PNIPAM grafts is synthesized via the click reaction of poly(PMMA‐alt‐VBA) with an excess of alkynyl‐terminated PNIPAM (alkynyl‐PNIPAM). The click coupling efficiency of PNIPAM grafts is determined to be ∼80%. Differential scanning calorimetry (DSC) analysis of poly(PMMA‐alt‐PNIPAM) reveals two glass transition temperatures (Tg). In aqueous solution, poly(PMMA‐alt‐PNIPAM) supramolecularly self‐assembles into spherical micelles consisting of PMMA cores and thermoresponsive PNIPAM coronas, which were characterized via a combination of temperature‐dependent optical transmittance, micro‐differential scanning calorimetry (micro‐DSC), dynamic and static laser light scattering (LLS), and transmission electron microscopy (TEM). © 2009 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 47: 2608–2619, 2009

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“…This indicates that bulky isobornyl group makes the molecular chain hard to move, thus, the T g of the copolymers are improved dramatically. Moore et al37, 38 reported that the T g of styrene and N ‐phenyl maleimide copolymers with 30 wt % N ‐phenyl maleimide are 193°C measured by DTA. With the N ‐phenyl maleimide contents increased from 30 to 40 wt %, “service” temperatures of the copolymer increased linearly from 193 to 204°C accordingly.…”

Section: Resultsmentioning

confidence: 99%

Preparation of poly(styrene‐co‐isobornyl methacrylate) beads having controlled glass transition temperature by suspension polymerization

Zhang

Chen

et al. 2012

J of Applied Polymer Sci

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The styrene (St) and isobornyl methacrylate (IBMA) random copolymer beads with controlled glass transition temperature (T g ), in the range of 105-158 C, were successfully prepared by suspension polymerization. The influence of the ratios of IBMA in monomer feeds on the copolymerization yields, the molecular weights and molecular weight distributions of the produced copolymers, the copolymer compositions and the T g s of these copolymers was investigated systematically. The monomer reactivity ratios were r 1 (St) ¼ 0.57 and r 2 (IBMA) ¼ 0.20 with benzyl peroxide as initiator at 90 C, respectively. As the mass fraction of IBMA in monomer feeds was about 40 wt %, it was observed that the monomer conversion could be up to 90 wt %. The fractions of IBMA unit in copolymers were in the range of 35-40 wt % and T g s of the corresponding copolymers were in the range of 119.6-128 C while the monomer conversion increased from 0 to greater than 90 wt %. In addition, the effects of other factors, such as the dispersants, polymerization time and the initiator concentration on the copolymerization were also discussed.

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Synthesis of Styrene/Maleimide Copolymers and Physical Properties Thereof

Cited by 24 publications

References 0 publications

Synthesis and characterization of imidized poly(styrene‐maleic anhydride) nanoparticles in stable aqueous dispersion

Synthesis and characterization of imidized poly(styrene‐maleic anhydride) nanoparticles in stable aqueous dispersion

Synthesis of amphiphilic copolymer brushes possessing alternating poly(methyl methacrylate) and poly(N‐isopropylacrylamide) grafts via a combination of ATRP and click chemistry

Preparation of poly(styrene‐co‐isobornyl methacrylate) beads having controlled glass transition temperature by suspension polymerization

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