Characteristic ratio of poly(tetrahydrofurfuryl acrylate) and poly(2-ethylbutyl acrylate)

Zioga, Agapi; Ekizoglou, Nikos; Siakali-Kioulafa, Ekaterini; Hadjichristidis, Nikos

doi:10.1002/(sici)1099-0488(19970730)35:10<1589::aid-polb10>3.0.co;2-6

Cited by 11 publications

(5 citation statements)

References 3 publications

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“…The dimensions of a single chain in these systems is readily found from the well-known formulas (e.g., ref ) for the radius of gyration or root-mean-square end-to-end distance, given the degree of polymerization and the characteristic ratio of the polymer. Although the characteristic ratio for butyl acrylate does not seem to be reported in the literature, values for similar acrylates in a range of solvents lie between 7 and 8. ,, …”

Section: Resultsmentioning

confidence: 81%

“…Although the characteristic ratio for butyl acrylate does not seem to be reported in the literature, values for similar acrylates in a range of solvents lie between 7 and 8. 35,41,42 Ignoring any effect of the hydrophilic component, the unperturbed dimension of the chains in runs such as CF97.61 is calculated to be ∼9 nm at the highest conversion to which this run was taken (assuming an characteristic ratio of 7.5). This is much less than the particle size (diameter ≈ 60 nm).…”

Section: Resultsmentioning

confidence: 99%

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Ab Initio Emulsion Polymerization by RAFT-Controlled Self-Assembly

et al. 2005

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A method is developed to enable emulsion polymerization to be performed under RAFT control to give living character without the problems that often affect such systems: formation of an oily layer, loss of colloidal stability, or loss of molecular weight control. Trithiocarbonate RAFT agents are used to form short stabilizing blocks from a water-soluble monomer, from which diblocks can be created by the subsequent polymerization of a hydrophobic monomer. These diblocks are designed to self-assemble to form micelles. Polymerization is initially performed under conditions that avoid the presence of monomer droplets during the particle formation stage and until the hydrophobic ends of the diblocks have become sufficiently long to prevent them from desorbing from the newly formed particles. Polymerization is then continued at any desired feed rate and composition of monomer. The polymer forming in the reaction remains under RAFT control throughout the polymerization; molecular weight polydispersities are generally low. The number of RAFT-ended chains within a particle is much larger than the aggregation number at which the original micelles would have self-assembled, implying that in the early stages of the polymerization, there is aggregation of the micelles and/or migration of the diblocks. The latexes resulting from this approach are stabilized by anchored blocks of the hydrophilic monomer, e.g., acrylic acid, with no labile surfactant present. Sequential polymerization of two hydrophobic monomers gives completely novel core−shell particles where most chains extend from the core of the particles through the shell layer to the surface.

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Section: Resultsmentioning

confidence: 81%

Section: Resultsmentioning

confidence: 99%

Ab Initio Emulsion Polymerization by RAFT-Controlled Self-Assembly

et al. 2005

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“…Higher YIF and T g values of polymer AESO/THFMA led to the better mechanical properties compared to those of polymer AESO/THFA. This was caused by the replacement of methyl group in THFMA by hydrogen in THFA followed by increased chain flexibility 58 . Moreover, methyl group in THFMA caused the lower shrinkage during photocross‐linking.…”

Section: Resultsmentioning

confidence: 99%

“…This was caused by the replacement of methyl group in THFMA by hydrogen in THFA followed by increased chain flexibility. 58 Moreover, methyl group in THFMA caused the lower shrinkage during photocross-linking. Although both polymer AESO/THFA and AESO/THFMA specimens showed considerably high ε values when were prepared by LAB, compared to the specimens prepared by 3DPC.…”

Section: Dlp 3d Printing and Tensile Testmentioning

confidence: 99%

High biorenewable content acrylate photocurable resins for DLP 3D printing

Lebedevaite

Talacka²,

Ostrauskaitė

2020

J of Applied Polymer Sci

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Green chemistry and green engineering concepts have been combined to develop novel sustainable polymeric materials. Solvent free photocurable acrylate resins with biorenewable carbon content of 75%–82% suitable for application in DLP 3D printing technology were composed by commercially available bio‐based materials, acrylated epoxidized soybean oil (AESO), isobornyl methacrylate (IBOMA), methacrylic ester (ME), tetrahydrofurfuryl acrylate (THFA), and tetrahydrofurfuryl methacrylate (THFMA). They demonstrated high printing accuracy and good adhesion between layers. The monitoring of photocross‐linking kinetics of high biorenewable content acrylate photoresins by the real‐time photorheometry and analysis of their rheological parameters was carried out. Synthesized polymers exhibited high yield of insoluble fraction and thermal decomposition temperature at the weight loss of 10% above 300°C. Polymers AESO/IBOMA and AESO/THFMA showed the highest values of tensile modulus and tensile strength. Biodegradability of the synthesized polymers AESO/ME, AESO/THFA, and AESO/THFMA was investigated by measuring oxygen consumption in a closed respirometer. Such AESO‐based polymers can be a competitive solution to replace petroleum‐derived polymeric materials in additive manufacturing and reduce the environmental impact.

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“…Experimentally, the stiffness and the unperturbed dimensions of polymer chains are mainly estimated by two methods. The first is intrinsic viscosity measurements in Θ-solutions, based on the relation between ⟨ R 2 ⟩ and the intrinsic viscosity [η]. − The second is small-angle neutron scattering (SANS), applicable directly in the melt or glassy state by isotopic labeling. − …”

Section: Introductionmentioning

confidence: 99%

General Methodology for Estimating the Stiffness of Polymer Chains from Their Chemical Constitution: A Single Unperturbed Chain Monte Carlo Algorithm

2017

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The spatial dimensions and the stiffness (characteristic ratio, C ∞) of polymer chains are intimately related to key macroscopic properties such as the plateau modulus and the melt viscosity. Furthermore, these molecular features are very important in the selection and design of copolymer species used in directed self-assembly lithographic processes. We have developed a general methodology for predicting the chain dimensions of any polymer chain in the unperturbed state starting from its detailed atomistic structure. The methodology is based on performing Metropolis Monte Carlo (MC) simulation, leading to equilibration of the conformational distribution of a single unperturbed polymer chain, subject only to local interactions along its backbone. To define what constitutes local interactions, the maximal topological distance of repeat units between which nonbonded forces are active is varied systematically, until a maximum in stiffness is achieved. Our methodology was validated by comparing the predicted characteristic ratios for a series of polymers against the corresponding values estimated from MC simulations of the same polymers in the melt state based on the same force field. Furthermore, we have predicted the characteristic ratios for three polymers used in directed self-assembly lithographic processes and shown that they are in good agreement with reported experimental values.

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Characteristic ratio of poly(tetrahydrofurfuryl acrylate) and poly(2-ethylbutyl acrylate)

Cited by 11 publications

References 3 publications

Ab Initio Emulsion Polymerization by RAFT-Controlled Self-Assembly

Ab Initio Emulsion Polymerization by RAFT-Controlled Self-Assembly

High biorenewable content acrylate photocurable resins for DLP 3D printing

General Methodology for Estimating the Stiffness of Polymer Chains from Their Chemical Constitution: A Single Unperturbed Chain Monte Carlo Algorithm

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