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Highly porous poly(methyl methacrylate) (PMMA) with porosities ranging from 65 to 78% were synthesised at room temperature under UV light by the polymerisation in solution method with several cross-linker contents using ethylenglycol dimethacrylate. Bulk poly(methyl methacrylate) samples (non-porous) with the same cross-linker contents were also prepared as reference materials. The results of performing...
The localization of multi-walled carbon nanotubes (MWCNTs) in PMMA/LDPE blends was studied. Theoretical predictions suggested their preferential localization in the PMMA. Conversely, experimental work revealed that non-functionalized MWCNTs located in the LDPE, polymer first to melt. When the extrusion time is not long enough, the MWCNTs do not have the chance to further migrate to the thermodynamically...
Core-shell like structured barium zirconium titanate-barium calcium titanate-poly(methyl methacrylate) [(Ba0.94Ca0.06)(Zr0.16Ti0.84)O3-PMMA] nanocomposites were prepared by surface-initiated atom transfer radical polymerization (SI-ATRP) of methyl methacrylate (MMA) from the surface of BZT-BCT nanoparticles. X-ray diffraction patterns of pure polymer and BZT-BCT nanoparticles revealed their amorphous...
This study is the first to report highly efficient production of homogeneous large-scale thin polymer films with a sponge-like porous structure via an improved phase separation method. A mixture of tetrahydrofuran and methanol, which is used as a highly volatile solvent/nonsolvent pair, is crucial to induce phase separation and thus determines the resulting structure. The obtained porous structure...
Transparent and high permittivity films were prepared by melt pressing poly(methyl methacrylate) (PMMA)-grafted 7 nm barium titanate (BT) particles. PMMA chains with molecular weights of 32–40 kDa were grafted on BT particle surfaces at a density of 0.2–0.7 chains nm−1 through surface-initiated atom transfer radical polymerization of methyl methacrylate. This yielded BT/PMMA composites with BT volume...
Poly(ethylene oxide)-block-poly(methyl methacrylate) amphiphilic copolymers were prepared via electrochemically mediated atom transfer radical polymerization (eATRP) utilizing only 50 ppm of CuII complex, rather than previously reported concentrations of catalyst of ca. 1,000–30,000 ppm. The copolymers were also prepared via a simplified electrochemically mediated ATRP (seATRP) procedure utilizing...
The phase behaviors of poly(methyl methacrylate) (PMMA) and cross-linked PMMA gel in the mixtures of water and alcohol (ethanol, 2-propanol, and t-butanol) were investigated at three different temperatures. Phase separation temperature was determined through thermo-optical analysis (TOA) and the swelling transition of PMMA gel was measured by a photon correlation spectroscopy (PCS) technique. All...
The microsphere of poly(methyl methacrylate) (PMMA)/graphene composite, having a core–shell structure, is effectively prepared by Pickering suspension polymerization using a water-dispersible sulfonated graphene alone as a Pickering stabilizer. This is the first case where a graphene is designed as a Pickering stabilizer for suspension polymerization. The sulfonated graphene is prepared using a novel...
Fracture-induced mechanochemical activation is achieved for the first time in a structural engineering polymer. Rubber toughened PMMA is lightly cross-linked (1.0 mol%) with the mechanophore spiropyran by free radical polymerization. Single Edge Notch Tension tests are performed on the spiropyran-linked material and a distinct change in color and fluorescence is detected at the crack tip, indicating...
Poly(methyl methacrylate) (PMMA) monoliths with a three-dimensional continuous interconnected porous structure in a single piece were fabricated via thermally induced phase separation (TIPS) by utilizing unique cosolvency toward PMMA. We found that PMMA was soluble in a mixture of non-solvents (ethanol and water) at 60 °C. Cooling the solution resulted in formation of a monolith having interconnected...
Novel, star-shaped multifunctional poly(methyl methacrylate) (PMMA) macromonomers with well-defined average number of pendant methacrylate groups were synthesized by copolymerizing MMA with 2-hydroxyethyl methacrylate (HEMA) via quasiliving ATRP with a tetrafunctional initiator in methanol at 10 °C, followed by methacrylation of the hydroxyl groups of the HEMA units. The resulting tailor-made poly(methyl...
Polymer blends and alloys represent an interesting approach to implement bio-based poly(l-lactic acid) (PLLA) into high-value applications. Here, a re-evaluation of the miscibility extent between both biobased PLLA and petro-based poly(methyl methacrylate) (PMMA) is proposed in order to tune morphologies and properties of resulting blends upon either a solvent-casting method or a twin-screw extrusion...
The effects of network structure of crosslinked poly(methyl methacrylate) (PMMA) discs on dynamic penetrant transport behavior were investigated through gravimetric integral sorption studies. Samples of P(MMA-co-(EG) x DMA) were synthesized via an iniferter-mediated, thermally-initiated free radical polymerization procedure to produce polymers with controlled variations in network structure...
For the first time poly(methyl methacrylate) (PMMA) nanocomposites based on a synthetic shear-stiff, mica-like K-fluorohectorite clay were prepared by melt -compounding. Besides stiffness, this new synthetic type of clay offers very high aspect ratios above 600 after exfoliation, whereas a tailored surface modification of the clay yielded a good compatibility to the matrix material. The influence...
The synthesis of micron-sized polymer particles with a core-shell pomegranate-like morphology is presented. The proposed polymerization technique takes advantage of a reaction-induced micro-phase separation within a suspended organic liquid droplet containing monomer, a chemical initiator, a steric stabilizer, and a poor solvent for the polymer. With an increase in monomer conversion, the monomer...
In this paper it is shown that elastic properties of a poly(methyl methacrylate) melt in the linear range of deformation are more significantly influenced by the addition of silica nanoparticles than viscous ones. The effect is the strongest in the steady-state which is reached at several thousand seconds. That is the reason why the often used dynamic-mechanical experiments are not a very suitable...
In this study, 2-methacryloxyethyl phenyl phosphate (MEPP), a phosphorus-containing flame retardant, was synthesised via the esterification of phenyl dichlorophosphate (PDCP) with 2-hydroxyethyl ethylene methacrylate (HEMA), followed by hydrolysis. A two-stage bulk polymerisation process prepared MEPP/methyl methacrylate (MEPP/MMA) copolymers containing various amounts of MEPP. The condensed-phase...
A series of poly(methyl methacrylate)/montmorillonite (PMMA/MMT) nanocomposite were prepared by successfully dispersing the inorganic nanolayers of MMT clay in an organic PMMA matrix via in situ photoinitiated free radical polymerization. Methyl methacrylate monomer was first intercalated into the interlayer regions of organophilic clay hosts by “click” chemistry followed by a typical photoinitiated...
Poly(methyl methacrylate)/zirconia (PMMA/ZrO 2 ) nanocomposites with ZrO 2 content as high as 15wt% were prepared by modifying non-aqueous synthesized ZrO 2 nanoparticles with methacryloxypropyltrimethoxysilane (MPS) in tetrahydrofuran, dispersing MPS-functionalized ZrO 2 nanoparticles in MMA and following in situ bulk polymerization with controlled pre-polymerization...
Well-defined poly(methyl methacrylate)–silica nanocomposites were produced by “grafting through” using reversible addition–fragmentation chain transfer (RAFT) polymerization. The surface of silica nanoparticle was modified covalently by attaching methacryl group to the surface using 3-methacryloxypropyldimethylchlorosilane. Polymerization of methyl methacrylate (MMA) using the 4-cyano-4-(dodecylsulfanylthiocarbonyl)sulfanyl...
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