Materials Literature
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Paper formation is an important characteristic for paper.It is affected by several papermaking variables such as refining, settling times, furnishes and chemical additives.This work involved the study on how grammage probability distributions (GPD) can be useful to predict the paper formation originating from PFI fibr…
A highly functional flexible light-emitting electrochemical cell during operation is depicted in this cover image. By optimizing the composition of the active material and by employing an appropriate operation protocol, as described by Fang et al. on page 2671, more than one month of uninterrupted operation at signifi…
The electronic and molecular structures of Ca3P2 and Ca6P4 are investigated using high-level ab initio methods. The lowest energy structure for Ca3P2 is found to be a Jahn-Teller distorted triplet. An excited-state singlet is found with various post HF methods; however, DFT incorrectly predicts a closed shell singlet…
August 2008.The meetings were attended by 2477 participants and 140 accompanying persons from 66 countries and territories.The General Assembly and Congress were opened on the evening of 23 August at the Convention Centre.Welcoming Addresses were made by Professor T. Tsukihara (Chair of the Local Organizing Committee)…
ADVERTISEMENT RETURN TO BOOKFront MatterNEXTControlled/Living Radical Polymerization: Progress in ATRP, Copyright, ForewordDOI: 10.1021/bk-2009-1023.fw001Publication Date (Print):August 13, 2009Publication History Published online10 September 2009Published inprint 13 August 2009RIGHTS & PERMISSIONSControlled/Living Ra…
BACKGROUND: The regeneration ability of articular cartilage is limited. However, the emerging of tissue regeneration based on the use of autologous cells appears to offer great promise in repairing articular cartilage defects. OBJECTIVE: To evaluate the short-term effectiveness and safety of autologous chondrocyte imp…
Filler networking in elastomers Flocculation of fillers during heat treatment For a deeper understanding of filler networking in elastomers it is useful to monitor structural relaxation phenomena during heat treatment (annealing) of the uncrosslinked composites. This can be achieved by investigations of the time devel…
Model amphiphilic polymer conetworks have been successfully produced by combination of ring-opening polymerization (ROP) of ε-caprolactone and atom transfer radical polymerization (ATRP) of amino-functionalized methacrylate monomer. Their swelling properties have been investigated in Millipore® water as well as in tol…
Photopolymerization of a high internal phase emulsion (HIPE) containing a polyemrizable ATRP initiator resulted in polyHIPE with ATRP initiator groups on the surface available for polymer grafting reactions. This was initially shown for the grafting of MMA. Further functionalization of the polyHIPE was obtained by the…
The adhesive and cohesive properties of the amino acid L-3,4-dihydroxyphenylalanine (DOPA) have been widely explored as a potential material for adhesion, based, among other things, on the biological system of blue mussel extracellular byssal threads and foot proteins. Proteins containing DOPA are generated within mam…
Abstract National Aeronautics and Space Administration (NASA) Johnson Space Center White Sands Test Facility (WSTF) performed particle impact testing to determine whether there is a particle impact ignition hazard in the quick disconnects (QDs) in the environmental control and life support system (ECLSS) on the Intern…
Specific developments in optical technology over the past thirty years including refractive materials, thin film coatings and surface profiles will be discussed. A large variety of optical designs which depend on some of these developments will be described. The optical design examples presented will cover the infrare…
A synthesis platform is described to access defined peptide-polymer conjugates by reversible addition fragmentation chain transfer polymerization (RAFT) routes. Different strategies are summarized to introduce a chain transfer agent (CTA) to a supported peptide, yielding peptide-CTAs. The approaches rely on dithioeste…
Tri- and star-block copolymers were investigated with respect to their "baroplastic" properties. A series of well-defined baroplastic materials containing immiscible low and high T g segments were synthesized by atom transfer radical polymerization. The polymers with different topologies can be processed by applying p…
Three comblike amphiphilic copolymers have been prepared via conventional free-radical random copolymerization of [2-(acryloyloxy)ethyl]trimethylammonium chloride (AETMAC), and stearyl methacrylate (SMA) with different feed ratios in ethanol solution. Subsequently, these copolymers were used as polymeric surfactants i…
Advances in electronics, in energy efficient transport technology and in energy generation from renewable sources require parallel advances in polymer chemistry. A key chemistry in all these areas is that of the epoxy group and there are currently exciting developments in this field. Advanced epoxy composites contribu…
We present a theoretical study of stress relaxation of star-shaped polymers starting from a Rouse model for a polymer in a tube. Instead of focusing on the potential in which the chain moves, we mathematically study the Rouse equation with a time-dependent boundary condition. This boundary condition arises as a conseq…
Device-quality GaN thin films have been grown on Si(111) substrates using an Al2O3 transition layer, and initial devices show performance similar to comparable devices on sapphire. X-ray diffraction rocking curve scans show a linewidth of 378 arcsec for the GaN (0002) reflection. Comparison of these layers to GaN laye…
An undoped GaN homoepitaxial layer has been grown by metal-organic chemical vapour deposition on a conductive free-standing bulk GaN substrate. The dislocation density of the homoepitaxial layer characterised by cathodoluminescence mapping technique is about 6×106 cm−2. By fabricating a vertical Schottky diode structu…
Understanding how the broadening of the molecular weight distribution (MWD) affects the termination rate coefficient, 〈 k t 〉, during free radical polymerization (FRP) is important for developing models capable of accurately predicting rates of polymerization and the resulting MWDs. In this article, we studied the evo…