Phase behavior and modeling of the poly(methyl methacrylate)–CO2–methyl methacrylate system

Lora, Michele; McHugh, Mark A.

doi:10.1016/s0378-3812(99)00043-6

Cited by 78 publications

(94 citation statements)

References 22 publications

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“…It is interesting that the molar mass and yield of the PMMA reached maximum when 40 wt% MMA was used. Lora and McHugh's data 26 show that PMMA is soluble only at 300 bar in the PMMA (5 wt%) -MMA (48.4 wt%) -CO 2 (46.6 wt%) mixture. If the high molar mass and yield of the PMMA is derived from the cosolvent effect, the PMMA synthesized at 50.6 wt% MMA should have higher molar mass and yield than the PMMA polymerized at low MMA concentrations.…”

Section: Resultsmentioning

confidence: 97%

“…At the initial stage of the polymerization, the growing PMMA chains can be dissolved in MMA -CO 2 solution at low concentrations of low molar mass PMMA. However, from Lora and McHugh's data, 26 it is apparent that at 207 bar, the PMMA chains will be separated from the homogenous mixture of PMMA -MMA -CO 2 . Therefore, the cosolvent effect of MMA is supposed to be greatly limited in our experimental conditions.…”

Section: Resultsmentioning

confidence: 98%

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GMA-functionalized reactive stabilizer for polymerization of methyl methacrylate in supercritical CO2: effect of stabilizer, initiator and monomer concentrations

2008

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Glycidyl methacrylate linked poly(dimethylsiloxane) (GMA-PDMS) was synthesized and used as a stabilizer for the dispersion polymerization of methyl methacrylate (MMA) in supercritical CO 2 . This study examined the effect of the concentrations of the stabilizer, 2,2'-azobisisobutyronitrile (AIBN) initiator, and MMA on the yield, molecular weight, and morphology of the poly(methyl methacrylate) (PMMA) product. PMMA was obtained in 94.6% yield using only 0.87 wt% GMA-PDMS. When the AIBN concentration was increased from 0.25 to 1.06 wt%, the molecular weight and particle size of the PMMA decreased from 56,600 to 21,600 and from 4.1 to 2.7 µm, whereas the particle size distribution increased from 1.3 to 1.9. The M n of the PMMA product ranged from 41,600 and 55,800 under typical polymerization conditions. The PMMA particle diameter ranged from 1.8 to 11.0 µm and the particle size distribution ranged from 1.4 to 1.8.

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Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 98%

GMA-functionalized reactive stabilizer for polymerization of methyl methacrylate in supercritical CO2: effect of stabilizer, initiator and monomer concentrations

2008

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“…[48] Complete solubility of oligomers consisting of 30 monomer units at 200 bar and 35 8C has been reported. [7] Kumar et al [43] studied the solubility of polystyrene oligomers at 250 bar and 60 8C, finding that polymer radicals with 10 monomer units in chain length are significantly soluble.…”

Section: Reaction Phasementioning

confidence: 99%

Simulation of RAFT Dispersion Polymerization in Supercritical Carbon Dioxide

Jaramillo‐Soto

Castellanos-Cárdenas

García-Morán

et al. 2008

Macro Theory & Simulations

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The RAFT radical polymerization of vinyl monomers in supercritical carbon dioxide was modeled using the Predici® simulation package. The sensitivity of polymerization responses on formulation and process variables was analyzed. The simulations were carried out using kinetic and physical parameters corresponding to the polymerization of methyl methacrylate in supercritical carbon dioxide, using AIBN as initiator, at 65 °C and 200 bar, and using values of the addition and fragmentation kinetic rate constants of a “typical” RAFT agent, as reference conditions. This is the first report in the literature addressing the modeling or simulation of RAFT polymerization in supercritical carbon dioxide.magnified image

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“…Ethylene, propilene, propane (also SLE), 1-butene, 1-hexene, n-alkane (C6-C8) [120], [127], [140] Poly-methyl methacrylate (PMMA) CO2-methyl methacrylate [141] Poly(Ethylene-co-Propylene)…”

Section: Polymeric Systems Modeling Using the Saft Equation And Its Mmentioning

confidence: 99%

A Survey of Equations of State for Polymers

Guerrieri¹,

Pontes²,

Costa³

et al. 2012

Polymerization

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Phase behavior and modeling of the poly(methyl methacrylate)–CO2–methyl methacrylate system

Cited by 78 publications

References 22 publications

GMA-functionalized reactive stabilizer for polymerization of methyl methacrylate in supercritical CO2: effect of stabilizer, initiator and monomer concentrations

GMA-functionalized reactive stabilizer for polymerization of methyl methacrylate in supercritical CO2: effect of stabilizer, initiator and monomer concentrations

Simulation of RAFT Dispersion Polymerization in Supercritical Carbon Dioxide

A Survey of Equations of State for Polymers

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