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An aniline trimer derivative possessing multiple furan groups (TFAT) is prepared and used as a building unit for preparation of self-healing anticorrosion coatings. The aniline trimer unit brings electrochemical activity to TFAT, and the tertiary amine and glycidylether groups provide TFAT excellent adhesive ability. Both features contribute to the high performance of anticorrosion property of crosslinked...
Sulfur was chemically incorporated into urushiol in one step to afford an oligomeric sulfurized urushiol (SU). About 53% of the linkages between urushiol monomer units are cleavable multi-sulfidic bonds. Surface modification of silica with SU can be achieved either in a suspension before rubber compounding or in situ during rubber compounding. SU performs better when added in situ into the rubber...
The modification of interface using nanoparticles in emulsions and immiscible polymer blends introduces elaborate methods to develop functional materials. In this study, we perform dissipative particle dynamics simulations to evaluate the distribution of interfacial tension over a polymer-polymer interface in the presence of carbon nanotubes (CNTs). The localization and interfacial self-assembly of...
The present study focuses on the swelling behavior of copolymer microgels of N-isopropylacrylamide (NIPAM) and acrylic acid (AAc) containing different concentrations of acrylic acid. The incorporation of the comonomer is investigated by Fourier transform infrared (FT-IR) spectroscopy and an incorporation threshold value for the comonomer is found, if the “classical” Pelton synthesis approach is used...
Structural properties of asymmetric peptide dendrimers up to the 11th generation are studied on the basis of the self-consistent field Scheutjens-Fleer numerical approach. It is demonstrated that large scale properties such as, e.g., the gyration radius, are relatively weakly affected by the asymmetry that is, by difference in the length of short and long spacers. However, the asymmetry has strong...
Gynecological cancer treatment strategies commonly employ pelvic brachytherapy, a technique that temporarily locates radioactive materials in or near the source of the tumor. Despite numerous advances in brachytherapy treatment protocols, advances in the required vaginal packing materials lag significantly. This paper describes a packing material for vaginal brachytherapy based on a poly(ethylene...
The elastic-viscous transition of tear fracture of rubber consists of three different fracture zones, the elastic-brittle fracture zone, the viscous-ductile fracture zone and the intermediate transition zone accompanied with stick-slip motion and a corresponding velocity jump at a constant strain energy release rate. Following the previous paper where the fundamental concept named the elastic-viscous...
In this work the effect of different doping anions on transparency, photovoltaic efficiency and interface properties of electropolymerized polypyrrole (PPy) films as counter electrode in bifacial DSSCs was study. The transparency of the counter electrode becomes relevant in order to enhance the final device efficiency and for alternative application area like of Building-Integrated Photovoltaic. PPy...
We report on the efficient loading of poplar propolis into core-shell micelles based on amphiphilic poly(ethylene oxide)-block-poly(n-butyl acrylate) (PEO-b-PnBA) diblock copolymers. The copolymers comprising a hydrophilic PEO block of constant length (113 monomer units) and a soft hydrophobic PnBA block of three different lengths (53, 99 and157 monomer units) were synthesized by atom transfer radical...
A polyrotaxane with end moieties cleavable by acidic fission or photolytic cleavage was synthesized by end capping with (α,α-dimethyl-3,5-dimethoxybenzyloxy) carbonyl groups. The obtained polyrotaxane was subdivided into its molecular ring and axis components after treatment with neat trifluoroacetic acid at room temperature or irradiation with a high-pressure mercury lamp.
When used as an industrial polymer, poly(vinyl alcohol) (PVA) has the disadvantage of low thermal decomposition temperature. Therefore, various studies are under way to overcome this drawback. PVA is thermally decomposed in a two-stage process, in which radicals are formed in the first stage, and subsequently the backbone chain of PVA is decomposed via a chain reaction. Poly(3,4-dihydroxy-L-phenylalanine)...
Electrospun fibres are nowadays extensively studied for biomedical applications such as tissue engineering and drug delivery. Here, fibres for such applications are electrospun from photopolymer blends using a volatile solvent. The obtained nonwoven fibre mats were textured using a photoembossing technique that uses the interference of two coherent UV laser beams followed by a thermal development...
A molecular formulation of the onset of plasticity is proposed to assess temperature and strain rate effects in anisotropic semi-crystalline rubbery films. The presented plane stress criterion is based on the strain rate-temperature superposition principle and the cooperative theory of yielding, where some parameters are assumed to be material constants, while others are considered to depend on specific...
The physical ageing of poly(l-lactic acid) (PLLA) samples crystallized in a wide temperature range, is compared, through the analysis of the enthalpy relaxation, with the behavior of a completely amorphous sample, in the same undercooling conditions. A preliminary determination of the percentage of the different phases in the semi-crystalline samples (crystalline, mobile amorphous and rigid amorphous...
In this article we demonstrate the role of chain architecture on the relaxation dynamics of poly(acrylated epoxidized soybean oil) (PAESO), a hyperbranched polymer, with a particular focus on the role played by intramolecular loops. PAESO is produced by reversible addition-fragmentation chain transfer (RAFT) polymerization from acrylated epoxidized soybean oil (AESO) containing an average of 2.6 polymerizable...
We synthesized Fe3O4/polystyrene (PS) composite nanoparticles via a Shirasu porous glass (SPG) membrane emulsification technique and examined their magnetorheological (MR) properties under external magnetic field strengths. The SPG method was adopted for achieving a narrow size distribution of the product nanoparticles containing magnetite. The structure and morphology of the samples were analyzed...
With the goal of elucidating the structure of polyvinylidene difluoride (PVDF) nanofibers, all-atom molecular dynamics simulations were performed, and the results were compared with structures observed in high resolution transmission electron microscopy (TEM) at the molecular level. Simulation shows that the stability of the β-phase component in a PVDF nanofiber is influenced by the diameter of the...
Corn starch based polylactide acid (PLA) and 2,5-furandicarboxylic acid (FDCA) based poly(butylene 2,5-furan dicarboxylate) (PBF) are melt blended together, and the binary bio-based blends show high reflectivity by several processing methods, including hot pressing, injection molding and 3D printing. We use optical microscopy to study the underlying structures and find that the phase separated and...
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