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Two naphthalimide derivatives (DMAENs) containing tertiary amine groups have been designed and synthesized. Upon exposure to near UV and visible LEDs (365 nm–455 nm), they lead to radicals without adding a hydrogen donor and, in combination with 2,4,6-tris(trichloromethyl)-1,3,5-triazine, an iodonium salt or N-vinylcarbazole, they produce radicals and cations. Compared to the well-known camphorquinone...
Novel photoinitiators based on a phenazine scaffold are proposed for the ring opening polymerization of epoxy monomers as well as the free radical polymerization of (meth)acrylates. Good to excellent polymerization profiles can be obtained upon different easily accessible, energy saving and cheap LEDs (385, 395 and 405 nm) as well as a diode laser at 405 nm or halogen lamp opening new fields for polymer...
The morphology of the resultant poly(ethyleneglycol dimethacrylate-co-methacrylic acid)/polydivinylbenzene (P(EGDMA-co-MAA)/PDVB) nanocapsules for in situ precipitation polymerization of divinylbenzene in presence of P(EGDMA-co-MAA) nanocapsules as templates was controlled by the density of the residual surface vinyl group of the P(EGDMA-co-MAA) nanocapsules, which was dependent on the cross-linking...
Periodic copolymers of ethylene and vinyl alcohol (EVA) were synthesized via acyclic diene metathesis (ADMET) polymerization of a series of structurally symmetric α,ω-diene monomers that containing two vinyl acetate (VAc) units, followed by exhaustive hydrogenation and subsequent hydrolysis. This synthetic methodology provided a new type of EVA copolymer with defined sequence and ever highest VA content...
The deformation behaviors of three types of polyethylene (PE) with different molecular weights and short chain branch contents were studied by in-situ Fourier transformation infrared microspectroscopic imaging (FTIRI) with a Focal Plane Array (FPA) detector during uniaxial tensile test. The crystal orientation distributions within a 250 × 250 μm 2 region during tensile test were obtained,...
A copolymer, poly(aniline-co-m-aminophenol), was synthesized chemically. The monomer concentration ratio strongly affects the copolymerization rate and the properties of the copolymer. A solution consisting 0.34M aniline, 0.012M m-aminophenol, 0.47M ammonium peroxydisulfate and 2M H 2 SO 4 was found to be an optimum mixture for the chemical copolymerization. The visible spectra show...
A sinomenine (SIN) molecule-imprinted monolithic stationary phase (MIMSP) with specific recognition for SIN was prepared by in situ technique, utilizing methacrylic acid (MAA) as a function monomer, ethylene glycol dimethacrylate (EDMA) as a cross-linking agent, and low-polar solvents (toluene and dodecanol) as porogenic solvents. The selectivity of the polymers for SIN was evaluated by high performance...
The optical properties of poly(phenylenevinylene) (PPV)/TiO 2 nanocomposites, prepared from mixtures of PPV precursor and titanium butoxide ethanol solution in a sol-gel process, are investigated by UV-VIS, FT-IR, PL spectroscopy and TEM. The TEM images showed that the TiO 2 nano-aggregates took the form of a sphere and finally ellipsoid with an alignment, as the content of TiO ...
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