Tag: M.W=250-300

Kafetzi, Martha published the artcileMultifaceted pH and Temperature Induced Self-Assembly of P(DMAEMA-co-LMA)-b-POEGMA Terpolymers and Their Cationic Analogues in Aqueous Media, Recommanded Product: Dodecyl 2-methylacrylate, the main research area is amphiphilic polymethacrylate diblock terpolymer self assembly RAFT polymerization.

This work focuses on the synthesis of novel amphiphilic block terpolymers of the type poly[(2-(N,N-dimethylamino) Et methacrylate)-co-(lauryl methacrylate)]-b-poly[(oligo ethylene glycol) Me ether methacrylate] (P(DMAEMA-co-LMA)-b-POEGMA) by reversible addition-fragmentation chain transfer polymerization The cationic amphiphilic polyelectrolyte analogs P(QDMAEMA-co-LMA)-b-POEGMA are obtained through quant. quaternization of the DMAEMA segments. Mol. characterization by size exclusion chromatog., NMR, and Fourier Transform IR spectroscopies indicates the successful synthesis of these novel series of block terpolymers. The amine forms of the block copolymers respond to pH and temperature changes in aqueous solutions by forming unimol. or multichain nanoaggregates of varying size, micropolarity, and internal structure, as indicated by light scattering and fluorescence spectroscopy techniques. At neutral and basic pH, the existence of micellar like nanoassemblies is observed in the solutions of P(DMAEMA-co-LMA)-b-POEGMA terpolymers, while aggregation into micellar-like clusters take place at temperature values above room temperature due to the presence of the hydrophobic LMA segments. Unexpectedly, the cationic polyelectrolytes P(QDMAEMA-co-LMA)-b-POEGMA counterparts show temperature responsiveness as a consequence of the amphiphilicity of the polymeric system.

Macromolecular Chemistry and Physics published new progress about Aggregates. 142-90-5 belongs to class esters-buliding-blocks, name is Dodecyl 2-methylacrylate, and the molecular formula is C16H30O2, Recommanded Product: Dodecyl 2-methylacrylate.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Balafouti, Anastasia published the artcileP( OEGMA-co-LMA ) hyperbranched amphiphilic copolymers as self-assembled nanocarriers, Category: esters-buliding-blocks, the main research area is hyperbranched amphiphilic copolymer preparation curcumin drug delivery bioimaging.

We report on the synthesis of novel amphiphilic hyperbranched copolymers, namely Hyperbranched-[poly (ethylene glycol) Me ether methacrylate-co-lauryl methacrylate] (H-[P(OEGMA-co-LMA)]), obtained by reversible addition-fragmentation chain transfer (RAFT) polymerization utilizing the divinyl monomer, ethylene glycol dimethacrylate (EGDMA) as the branching agent. Mol. characterization by size exclusion chromatog. (SEC) and proton NMR (1H-NMR) spectroscopy indicated the success of the polymerization The self-assembly behavior in aqueous media was investigated by light scattering techniques and fluorescence spectroscopy. The hyperbranched copolymers form multimol. aggregates of nanoscale dimensions with a low critical aggregation concentration In addition, the model hydrophobic drug, curcumin (CUR), known also for its intrinsic fluorescence properties, was used in order to investigate the H-[P(OEGMA-co-LMA)] copolymers drug encapsulation ability. Curcumin is successfully loaded into the polymeric nanoparticles, as confirmed by dynamic light scattering and UV-Vis spectroscopy. Interestingly, curcumin hydrophobic interactions with the hyperbranched copolymers result in more well-defined co-assembled nanostructures, in terms of size and size distribution. The mixed copolymer-CUR nano-assemblies consist of small size nanoparticles (<100 nm) which exhibit relatively high size uniformity, colloidal stability and fluorescent properties. Overall, results signify that the biocompatible H-[P(OEGMA-co-LMA)] nanostructures could potentially serve as nanocarrier systems for drug delivery and bio-imaging applications. Journal of Polymer Science (Hoboken, NJ, United States) published new progress about Aggregates. 142-90-5 belongs to class esters-buliding-blocks, name is Dodecyl 2-methylacrylate, and the molecular formula is C16H30O2, Category: esters-buliding-blocks.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Yoon, Seung Kyun published the artcileDevelopment of blood compatible composite using MPC copolymer and polyolefin for Non-PVC blood bag application, HPLC of Formula: 142-90-5, the main research area is blood bag compatible composite MPC copolymer polyolefin.

Polyolefin is a good candidate for a blood bag material alternative to the poly (vinyl chloride) (PVC) blood bag that contains di-2-ethylhexyl phthalate (DEHP). However, polyolefin readily adsorbs some plasma proteins and platelets. To prevent these undesired adsorption, 2-methacryloyloxyethyl phosphorylcholine (MPC) – hydroxyethyl methacrylate (HEMA) – lauryl methacrylate (LMA) copolymers with varying monomer ratios were synthesized and used as blended material for additives to reduce platelet adsorption. Platelet adsorptive properties were reduced by blending MPC copolymers with polyolefin and confirmed by the platelet adhesion test and the activated partial thromboplastin time (APTT) test.

Macromolecular Research published new progress about Adsorption. 142-90-5 belongs to class esters-buliding-blocks, name is Dodecyl 2-methylacrylate, and the molecular formula is C16H30O2, HPLC of Formula: 142-90-5.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Zhao, Caimei published the artcileFabrication of hydrophobic NiFe2O4@poly(DVB-LMA) sponge via a Pickering emulsion template method for oil/water separation, COA of Formula: C16H30O2, the main research area is nickel iron oxide polydivinylbenzenecolaurylmethacrylate sponge; sponge Pickering emulsion template method oil water separation.

Super-hydrophobic porous absorbents are convenient, low-cost, efficient and environment-friendly materials in the treatment of oil spills. In this work, a simple Pickering emulsion template method was employed to fabricate an interconnected porous poly(DVB-LMA) sponge. A new co-Pickering stabilization system of Span 80 and NiFe2O4 nanoparticles was used to prepare ultra-concentrated internal phase water-in-oil (W/O) emulsions. After further polymerization, the resulting sponges were generated, which exhibited excellent adsorption selectivity due to the super-hydrophobicity and super-lipophilicity. Furthermore, the characterization results indicated that the composites had superior thermal stability, low d., high porosity and a flexible three-dimensional porous structure. Besides, the addition of nickel ferrite nanoparticles provided the materials with extra magnetic operability. High oil adsorption capacity (up to 36.9-84.2 g g-1), high oil retention, fast adsorption rate and superior reusability allowed the materials to be applied in the treatment of oily water.

Soft Matter published new progress about Adsorption. 142-90-5 belongs to class esters-buliding-blocks, name is Dodecyl 2-methylacrylate, and the molecular formula is C16H30O2, COA of Formula: C16H30O2.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Zhong, Hanyi published the artcileMinimizing the HTHP filtration loss of oil-based drilling fluid with swellable polymer microspheres, Application of Dodecyl 2-methylacrylate, the main research area is HTHP filtration oil drilling fluid swellable polymer microsphere.

Filtration control of drilling fluid plays an important role in the process of wellbore construction and ensures the success of drilling operation. A swellable polymer microsphere (SPM) of methylmethacrylate (MMA), Bu acrylate (BA), and lauryl methacrylate (LMA) was synthesized with suspension polymerization Its swelling property was characterized by oil adsorption capacity measurement. First, the effect of SPM on the filtration and rheol. properties of virgin organic clay dispersion was investigated. Then the filtration and rheol. properties of mineral oil-based drilling fluid in the presence of SPM were elucidated under the resp. conditions of hot aging temperature, oil to water ratio and d. Furthermore, the filtration control properties between SPM and two traditional filtration loss additives including modified lignite and asphaltic additive was compared. Addition of SPM exhibited obvious influence on the viscosity of oil-based drilling fluid especially at high concentration of 3 w/v%, therefore, a concentration of lower than 1.5 w/v% was recommended. After hot aging at 200°C, the oil-based drilling fluid containing 1 w/v% SPM exhibited an API filtration loss decrease of 85%, and HTHP filtration loss decrease of 79% in comparison with the base fluid. After hot rolling at 180°C, the API filtration loss decreased by 2%, 24% and 53%, and the HTHP filtration loss decreased by 42%, 54% and 65% resp. when 1 w/v% asphaltic additive, modified lignite and SPM are in the presence of the base fluid. Besides decreasing the filtration loss volume under high temperatures, incorporation of SPM also improves the filter cake quality of oil-based drilling fluid. SPM is capable of adsorbing considerable base oil and become swellable. The swellable polymer microspheres with favorably deformable and compressible properties can effectively fill the voids of filter cake and reduce the permeability, which leads to low filtration loss and minimization of solids invasion.

Journal of Petroleum Science & Engineering published new progress about Adsorption. 142-90-5 belongs to class esters-buliding-blocks, name is Dodecyl 2-methylacrylate, and the molecular formula is C16H30O2, Application of Dodecyl 2-methylacrylate.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Gmur, Tobias A. published the artcileTowards a Polymer-Brush-Based Friction Modifier for Oil, Category: esters-buliding-blocks, the main research area is polymer brush oil friction modifier.

To meet the need for oil-compatible friction modifier additives that can significantly reduce energy consumption in the boundary-lubrication regime, a macromol. design approach has been taken. The aim was to produce a lubricious polymer film on the sliding surfaces. A series of readily functionalizable block copolymers carrying an oleophilic poly(dodecyl methacrylate) block and a functionalizable poly(pentafluorophenyl methacrylate) block of various lengths was synthesized by means of reversible addition-fragmentation chain-transfer (RAFT) polymerization The poly(pentafluorophenyl methacrylate) block was used to attach surface-active nitrocatechol anchoring groups to the polymer. The friction-reduction properties of these polymers were assessed with 0.5 wt% solutions in hexadecane by means of rolling-sliding macroscopic tribol. tests. Block copolymers with roughly equal block lengths and moderate mol. weights were significantly more effective at friction reduction than all other architectures investigated. They also displayed lower friction coefficients than glycerol monooleate-a com. used additive. The film-formation ability of these polymers was examined using a quartz-crystal microbalance with dissipation (QCM-D), by monitoring their adsorption onto an iron oxide-coated QCM crystal. The polymer with highest lubrication efficiency formed a thin film of ∼ 17 nm thickness on the crystal, indicating the formation of a polymer brush. Interferometric rolling-sliding experiments with the same polymer showed a separating film thickness of ∼ 20 nm, which is consistent with the QCM-D value, bearing in mind the compression of the adsorbed layers on the two sliding surfaces during tribol. testing.

Tribology Letters published new progress about Adsorption. 142-90-5 belongs to class esters-buliding-blocks, name is Dodecyl 2-methylacrylate, and the molecular formula is C16H30O2, Category: esters-buliding-blocks.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Abirami, A. L. Alagu published the artcileSynthesis and application of porous oil-sorbent microspheres: Characterization, retention capacity and sorption kinetics, COA of Formula: C16H30O2, the main research area is oil spill water pollution treatment polymer sorbent microsphere.

The article focuses on the study of oil spill cleanup in an aquatic media by comparing the oil sorption capacities of three polymeric sorbents. Styrene – dodecyl methacrylate – DVB with toluene as porogen (P3) showed a highest removal ability of 5 times its weight However, key aspect of this research is associated with the retention capacities of the sorbents. The loss in weight measured over time was found to be numerically insignificant for all the three sorbents. Water contact angle for the sorbents i.e., P1, P2, P3 were found to be 113.3°, 107.2° and 97.5° resp. SEM results confirmed the entrapment of oil between the polymer mols. thereby confirming the phenomenon of sorption. The sorption kinetics of oil over the sorbent surface was followed the pseudo-second order model. The prepared sorbents can be successfully employed for the recovery of oil spills from water sources.

Separation and Purification Technology published new progress about Adsorption. 142-90-5 belongs to class esters-buliding-blocks, name is Dodecyl 2-methylacrylate, and the molecular formula is C16H30O2, COA of Formula: C16H30O2.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Zhang, Rui published the artcileThermoresponsive hydrophobic copolymer grafted on agar microspheres for all-aqueous bioseparations, Computed Properties of 142-90-5, the main research area is agar microsphere thermoresponsive hydrophobic copolymer graft; N-isopropylacrylamide; agar microspheres; bioseparations; lauryl methacrylate; thermoresponsive polymers.

Agar microspheres were prepared by water-oil emulsification and cross-linked under alk. condition. The thermoresponsive hydrophobic copolymer, poly(N-isopropylacrylamide-co-lauryl methacrylate-co-acrylamide), was grafted on the agar microspheres via atom transfer radical polymerization The agar microspheres grafted with copolymers were characterized by light microphotog., elemental anal., Fourier transform IR spectroscopy, SEM, and XPS. The chain lengths and hydrophobic monomer ratio of the grafting linear polymer had significant effects on the hydrophobicity and adsorption capacity of agar microspheres at different temperatures The thermoresponsive microspheres were used for separation of proteins and showed binding and release behavior by change of temperatures without change in mobile phase composition Thus, we suggest thermoresponsive agar microspheres as an alternative separation media for all-aqueous biosepns.

Journal of Separation Science published new progress about Adsorption. 142-90-5 belongs to class esters-buliding-blocks, name is Dodecyl 2-methylacrylate, and the molecular formula is C16H30O2, Computed Properties of 142-90-5.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Xu, Qingbo published the artcileFabrication of fluorine-free superhydrophobic cotton fabric using fumed silica and diblock copolymer via mist modification, Synthetic Route of 142-90-5, the main research area is superhydrophobic cotton fabric silica diblock copolymer mist modification.

Immobilizing inorganic particles to improve the roughness or coating with fluorinated agents and polysiloxanes to reduce surface energy is the most popular approach for constructing superhydrophobic cotton fabrics. However, the poor durability, health and environmental concerns, and other serious drawbacks limit the application of superhydrophobic cotton fabrics. In the present work, we describe a simple and facile fabrication strategy to construct robust fluorine-free superhydrophobic surfaces of cotton fabric via a mist technique. The modified cotton fabrics were first immobilized by fumed silica (SiO2) particles to improve the roughness and then covered with a diblock copolymer of poly[(Me methacrylate)-b-(lauryl methacrylate)] (PMMA-b-PLMA), which was synthesized by RAFT polymerization, to reduce the fabric’s surface energy. The mist technol. used ensures that the PMMA-b-PLMA covers the SiO2 particles on the surface of the fabric with a thin coating. Therefore, the SiO2 particles were stably immobilized on the fabric surface without reducing the roughness. As a result, the water contact angle (WCA) values of the prepared cotton fabrics reached reached 156.7°±0.5°. Moreover, even after 1600 abrasion cycles or 80 laundering cycles, the WCA values of the fabric samples were still higher than 150.1°±0.5°. The stable superhydrophobic cotton fabric surfaces are useful for self-cleaning, oil-water separation, and other potential areas.

Progress in Organic Coatings published new progress about Absorption. 142-90-5 belongs to class esters-buliding-blocks, name is Dodecyl 2-methylacrylate, and the molecular formula is C16H30O2, Synthetic Route of 142-90-5.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Ghasemzadeh, Hossein published the artcileNanomagnetic Organogel Based on Dodecyl Methacrylate for Absorption and Removal of Organic Solvents, Formula: C16H30O2, the main research area is nanomagnetic organogel acrylic polymer absorption removal organic solvent.

A novel nanomagnetic organogel was synthesized by in situ emulsion polymerization-crosslinking method using dodecyl methacrylate (DDMA) and styrene (St) as monomers, divinylbenzene (DVB) as a crosslinking agent, azobisisobutyronitrile (AIBN) as an initiator, and Fe3O4 as a nanomagnetic particle. Modification of the network was carried out by inclusion of the multi-walled carbon nanotubes (MWCNT) into the organogel matrix. The structure of the nanocomposite was characterized using FTIR spectroscopy, SEM, TEM, TGA/DTG, VSM, and BET anal. The effects of various parameters such as the amount of crosslinker, initiator, Fe3O4, and reaction time as well as monomer ratio on the oil absorption of the organogel were studied. The synthesized organogel can absorb about 35.5, 22.1, 29.86, 14.58, 17.6, 15.3, and 13.7 g·g-1 of CHCl3, toluene, CH2Cl2, hexane, crude oil, gasoline, and diesel oil, under the optimized polymerization conditions, resp. The nanocomposite organogels can be easily separated by a magnetic field after absorption of organic solvents.

Chinese Journal of Polymer Science published new progress about Absorption. 142-90-5 belongs to class esters-buliding-blocks, name is Dodecyl 2-methylacrylate, and the molecular formula is C16H30O2, Formula: C16H30O2.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics