2,2-Bis(3-allyl-4-hydroxyphenyl)hexafluoropropane and fluorosiloxane as coating materials for nerve agent sensors

Bhadury, Pinaki S.; Dubey, Vinita; Singh, Sapna; Saxena, Chhaya

doi:10.1016/j.jfluchem.2005.06.006

Cited by 11 publications

(7 citation statements)

References 12 publications

(24 reference statements)

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“…This same polymer has also been used in the solid-phase microextraction of sarin from the headspace of nerve agent samples [25]. Hybrid organic/inorganic siloxane polymers have also been used by Bhadury et al [26] to coat piezoelectric sorption detectors.…”

Section: Polymersmentioning

confidence: 99%

Synthetic Methods Applied to the Detection of Chemical Warfare Nerve Agents

Giordano¹,

Collins²

2007

COC

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Recent events as they relate to the war on terror make it abundantly clear that the rapid detection of chemical warfare nerve agents is essential. While the detection of these agents clearly falls into the purview of the analytical chemist, the importance of the organic chemist in the development of new techniques or approaches remains intact. This review serves to introduce the reader to a number of methods for detecting nerve agents with a focus on those techniques which rely on synthetic chemistry to improve overall performance with respect to selectivity, sensitivity and analysis time.

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Section: Polymersmentioning

confidence: 99%

Synthetic Methods Applied to the Detection of Chemical Warfare Nerve Agents

Giordano¹,

Collins²

2007

COC

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“…These polymers exhibited modest h‐b acidic properties and also included significant inter‐ and intramolecular hydrogen bonding. More recently, addition of electron withdrawing halogens in close proximity to hydroxyl groups has allowed a dramatic increase in the h‐b acidity with a concomitant reduction in the h‐b basicity 7, 10–12, 17–26, 30–37, 39–50…”

Section: Introductionmentioning

confidence: 99%

“…In the design of these h‐b acid polymers several physicochemical properties were considered. These include a glass transition temperature ( T g ) at or below the anticipated application temperature, strong but reversible sorption of analyte, thermal and chemical stability at operating conditions, and the ability to target analytes of interest 18, 22, 32, 43, 44, 51. There have been three main phases of the work at NRL in sorptive polymers to take advantage of these properties.…”

Section: Introductionmentioning

confidence: 99%

“…This includes the development of the h‐b acidic fluoropolyol oligomer (FPOL),39, 52 h‐b acidic polysiloxanes,5, 30, 21–23, 53 and more recently h‐b acidic polycarbosilanes 10, 21–26, 54–56. The switch from the ether linked FPOL oligomers to the hexafluoroisopropanol (HFIP) substituted siloxanes was aimed at improving the h‐b acidity and decreasing the h‐b basicity properties of the hydroxyl group 17, 33, 43, 45, 54–56. The siloxane polymers developed include SXFA and SXFA2 which both offered low T g properties suitable for rapid vapor sorption and functional groups with stronger h‐b acidity when compared to FPOL 23, 32, 40, 45…”

Section: Introductionmentioning

confidence: 99%

“…The recent development of hybrid carbosilane‐siloxane and phenol based polymers such as BSP3, BSP6, and DKAP offer some improved sorbent characteristics compared to FPOL and SXFA 43–45, 47, 53. However, the instability of the siloxane linkage remains a weakness that can lead to degradation of polymer properties over time.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and characterization of a hyperbranched hydrogen bond acidic carbosilane sorbent polymer

Higgins¹,

Simonson²,

Houser³

et al. 2010

J. Polym. Sci. A Polym. Chem.

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Sorbent polymers can be designed to target molecular interactions with a variety of hazardous chemicals including explosives, chemical agents, narcotics, and toxic industrial chemicals. Applications of functionalized sorbent polymers include preconcentrator devices, SPME fibers, membrane introduction systems, chromatographic stationary phases and coatings for chemical sensors. One common feature of a wide range of hazardous chemicals is their hydrogen bond (h-b) basicity. In this work, we report on the synthesis and characterization of a h-b acidic hyperbranched carbosilane fluoroalcohol based sorbent polymer (poly(methyldi(1,1,1-trifluoro-2-trifluoromethyl-2-hydroxypent-4-enyl)silane; HCSFA2), which is suitable for sorbing these hazardous h-b basic analytes. Multiple batches of HCSFA2 were characterized with routine composition, spectroscopic, thermal analysis, and inverse gas chromatography (iGC) to evaluate polymer physicochemical properties. In comparison with previously developed h-b acidic polymers (e.g., FPOL and SXFA), HCSFA2 exhibits a sorption improvement of 10-15 fold for h-b basic analytes. V C 2010 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 48: 3000-3009, 2010

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Fluorinated bismaleimide resin with good processability, high toughness, and outstanding dielectric properties

Guo

Han

Liu

et al. 2015

J of Applied Polymer Sci

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In this study, novel fluorinated bismaleimide (BMI) resins were prepared by the copolymerization of 2,2 0 -bis[4-(4-maleimidephenoxy)phenyl]hexafluoropropane (6FBMP) and diallyl hexafluorobisphenol A (6FDABPA) to enhance their dielectric properties. The dielectric properties of the resins were investigated in the frequency range 7-18 GHz through a cavity method. Through the incorporation of a hexafluoroisopropyl group with the polymer chain, the dielectric constant (e) was effectively decreased because of the small dipole and the low polarizability of the carbon-fluorine (CAF) bonds. The 6FBMP/6FDABPA resin possessed excellent dielectric properties, with e being 2.88 and the dielectric loss being 0.009 at 10 GHz and 258C. In comparison with the 4,4 0 -bismaleimidodiphenylmethane (BDM)/2,2 0 -diallyl bisphenol A (DABPA) resin, the glass-transition temperature (T g ) of 6FBMP/6FDABPA decreased. The flexible ether group in the long chain of 6FBMP was considered to disrupt chain packing and cause a decreased crosslinking density and a lower T g . 6FBMP/6FDABPA showed a similar thermal decomposition temperature and good thermal properties like the BDM/DABPA resin, whereas the impact strength of the 6FBMP/6FDABPA resin was almost 1.6 times higher than that of the BDM/DABPA resin.

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2,2-Bis(3-allyl-4-hydroxyphenyl)hexafluoropropane and fluorosiloxane as coating materials for nerve agent sensors

Cited by 11 publications

References 12 publications

Synthetic Methods Applied to the Detection of Chemical Warfare Nerve Agents

Synthetic Methods Applied to the Detection of Chemical Warfare Nerve Agents

Synthesis and characterization of a hyperbranched hydrogen bond acidic carbosilane sorbent polymer

Fluorinated bismaleimide resin with good processability, high toughness, and outstanding dielectric properties

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