A procedure for generating robust polymeric composites that exhibit photonic bandgap (PBG) and mechanochromic properties is presented (see Figure). The long-range order in colloidal arrays stabilized through encapsulation a water-free matrix. These systems may be useful optical sensors or switching applications.

Abstract Surface characterization techniques for organic polymeric coatings are numerous and diverse. Many of these can provide physical information about how coating systems perform under certain environmental conditions, but they less mechanistic on function as corrosion barriers. Since many failures initiated from ionic diffusion through the subsequent reactivity at coating–metal interface is mostly electrochemical in nature, utility electrochemical‐based therefore more appropriate. This...

A unique class of aromatic ether polymers containing perfluorocyclopentenyl (PFCP) enchainment was prepared from the simple step growth polycondensation commercial bisphenols and octafluorocyclopentene (OFCP) in presence triethylamine. Model studies indicate that second addition/elimination on OFCP is fast results linear homopolymers copolymers without side products. The synthesis bis(heptafluorocyclopentenyl) aryl monomers their condensation with further led to PFCP alternating structures....

Interconnected systems of provide capabilities that aren't available in any single system. Fundamental service-oriented principles can help engineering them, regardless the implementation technologies used.

Transparent, film-forming fluorinated arylene vinylene ether (FAVE) polymers with enchained triarylamine (TAA) moieties were prepared and characterized. Control over fluoro-olefin content within the backbone, as a function of base, was confirmed postpolymerization dehydrofluorination shown to increase fluoroolefin from 5 31 mol %. Thermal cross-linking found occur approximately 100 °C lower than in traditional FAVE (ca. 160 °C). Electrochemical analysis demonstrated TAA retained its...

Three new bis (trifluorovinyl ether) monomers enchained with polycyclic aromatic hydrocarbon (PAH) cores were synthesized. Crystal structures obtained from single crystal X-ray diffraction analyses of two revealed ring-cleaved dione and ring-retained PAH cores. These subsequently underwent [2+2] thermal cyclodimerization affording novel perfluorocyclobutyl polymers high molecular weights narrow polydispersity indices. In addition, these demonstrated glass transition temperatures (>200 °C)...

ABSTRACT A novel class of semifluorinated perfluorocyclohexenyl (PFCH) aryl ether homo/copolymers was successfully synthesized with high yield through the step‐growth polymerization commercially available bisphenols and decafluorocyclohexene in presence a triethylamine base. The polymers exhibit variable thermal properties depending on functional spacer group (R). PFCH copolymers random alternating architectures were also prepared from versatile bis‐perfluorocyclohexenyl monomers. show...

This study introduces the phase diagram and interfacial characteristics of a novel lyotropic polymeric liquid crystal. The polymer consists an α-methylstilbene mesogenic group bridged by low energy perfluorocyclobutyl ring via flexible aryl ether linkages. polymer, obtained thermal cyclopolymerization trifluorovinyl monomers, forms lamellar mesophases over wide range temperatures molecular weights. Mesophase behavior probed optical microscopy, AFM, NMR, X-ray scattering is detailed. lamellae...

Over the past decade, there has been a shift in software engineering practice away from development of traditional stand-alone systems and toward large scale (SoS). The movement SoS, which is often not single organization control, requires change number maintenance evolution practices. This paper outlines basic dimensions traces its implications for maintenance.

Semi-fluorinated Perfluorocycloalkenyl (PFCA) aromatic polymers prepared from polycyclic hydrocarbon (PAH) bisphenols and contain reactive fluoroalkene linkages.

ABSTRACT A series of new segmented semifluorinated polyaryl ethers (PAEs) containing a biphenyl by oligoethylene (SFE) units were prepared nucleophilic addition commercial oligo(ethylene glycol)s to 4,4′‐bis(4‐trifluorovinyloxy)biphenyl. These thermoplastics characterized 1 H and F 19 nuclear magnetic resonance (NMR) attenuated total reflectance Fourier transform infrared (ATR‐FTIR). Gel permeation chromatography (GPC) analysis displayed number average molecular weights ( M n s) from 9000...

A variety of perfluorocycloalkenyl (PFCA) aryl ether monomers and polymers with enchained triarylamine units were successfully synthesized, characterized reported here. These are highly thermally stable show variable thermal properties. Successful conversion the newly synthesized TAA perfluorocyclopentenyl (PFCP) via formylation EAS demonstrates synthetic versatility moiety provides an excellent option for application specific post polymerization reactions. The cross-linking behavior PFCP...

Applied Technology Associates' ARS-12 series sensor is the most sensitive inertial angular vibration currently available. The sensing mechanism based on magnetohydrodynamic (MHD) principles. This has a nominal bandwidth from 1 - 1000 Hz and noise-equivalent angle of less than 50 nanoradians 2 Hz. ARS- 12 can measure motions 10 at discrete frequencies. Their solid-state design makes these sensors small extremely rugged. In addition, essentially impervious to linear acceleration cross-axis...

The main goal of this workshop is to provide an opportunity for participants present current work and have a lively discussion open issues the maintenance evolution SOA-based systems. dialog will include both business such as organizational change in context migrating SOA environment, technical analysis reuse potential legacy components environments. version research agenda be used starting point discussion.