Dielectric and pyroelectric properties of poly[2,3-bis(trifluoromethyl)norbornadiene]

Davies, G. R.; Hubbard, Hugh V.St.A.; Ward, I. M.; Feast, W. James; Gibson, Vernon C.; Khosravi, Ezat; Marshall, Edward L.

doi:10.1016/0032-3861(95)91309-u

Cited by 48 publications

(26 citation statements)

References 11 publications

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“…Davies et al [54] reported the pyroelectric properties of amorphous poly(2,3bis(trifluoromethy1)norbornadiene) poly(BTFMND). The dipole moment of BTFMND has been estimated to be close to p=3.7D and the dipole density is N = 3.9 x 1021 ~m -~.…”

Section: Fluorinated Polymersmentioning

confidence: 99%

Pyroelectric polymer electrets

Bauer

Lang

1996

IEEE Trans. Dielect. Electr. Insul.

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Pyroelectricity is the electrical response of a material to a change in temperature. It exists in polymers which contain spontaneous or frozen polarization resulting from oriented dipoles. This review describes the physical basis for the existence of the pyroelectric effect and discusses its behavior in a number of amorphous, semicrystalline, crystalline and liquid crystalline polymers. Some of the techniques for measurement of the pyroelectric effect are presented and its use in pyroelectric relaxation spectroscopy and thermal analysis is described. The spatial distribution of polarization and space charge through the thickness of polymer films can be determined by several thermal pyroelectric techniques. Recent developments in the integration of pyroelectric polymer infrared detectors with solid-state silicon devices are described. One of the most important recent applications of polymers is in photopyroelectric spectroscopy which can be used for the determination of a number of thermal and optical properties of materials. Finally, some miscellaneous applications in physics, chemistry and biology are presented.Polar liquid crystals (LC) seem to,be very interesting materials for pyroelectric applications, due to the strong orientation of

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Section: Fluorinated Polymersmentioning

confidence: 99%

Pyroelectric polymer electrets

Bauer

Lang

1996

IEEE Trans. Dielect. Electr. Insul.

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“…6), whereas the atactic polymer made via WCl 6 /Me 4 Sn initiation (54% trans-winylene content) showed an £ R value of ca. 16 (Davies et al, 1995). The explanation of this large difference requires that in the trans polymer the polar bis(trifluoromethyl)cyclopentenyl rings in the chain (Fig.…”

Section: Stereoregular Fluoropolymersmentioning

confidence: 99%

“…This allowed an assignment of syndiotacticity unambiguously to all-trans and, with a degree of uncertainty, to all-cis polymers. The assigment of the tacticity of the all-cis polymer has proved to be more problematic since, although there is only one way to obtain a very high £ R value (cooperative reinforcement of individual ring effects), there may be several ways of effecting cancellation of dipoles and consequently low £ R value (Davies et al, 1995).…”

Section: Stereoregular Fluoropolymersmentioning

confidence: 99%

“…PPV exhibits emissive electroluminscence and can be implemented as an emissive material in high-emitting diodes (Burroughes et al, 1990). The fluorinated section has been shown to have, after poling, a high re-laxed dielectric constant and demonstrate pyroelectric behavior (Davies et al, 1995). Both homopolymers are accessible via ROMP, but require different molybdenumbased Schrock-type initiators (Schrock, 1990b.…”

Section: Synthesis Of Electroluminescence Materialsmentioning

confidence: 99%

“…PPV is derived from the cisspecific living ROMP of XV, which works only when very active initiators, such as molybdenum hexafluoro alkylidene, are used (Miao and Bazan, 1994 a, b). Poly-(BTFMND) requires an all-trans, highly tactic stereochemistry to maximize its pyroelectric properties (Davies et al, 1995), which is achieved by the less reactive molybdenum ^-butoxide alkylidene initiator. The detailed sequence of steps is shown in Scheme 3-6.…”

Section: Synthesis Of Electroluminescence Materialsmentioning

confidence: 99%

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Ring‐Opening Metathesis Polymerization (ROMP) and Related Processes

Grubbs

Khosravi

2013

Materials Science and Technology

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The sections in this article are Introduction Development of Well‐Defined ROMP Initiators ROMP using Well‐Defined Tungsten‐ and Molydenum‐Based Alkylidene Initiators ROMP using Ruthenium‐Based Initiators Aqueous ROMP Other Metathesis Reactions Telechelic Polymers Ring‐Closing Olefin Metathesis ( RCM ) Materials Via ROMP Conducting Polymers Stereoregular Fluoropolymers Stereoblock Fluorocopolymers Synthesis of Electroluminescence Materials Fluorinated Block Copolymers Graft Copolymers Nanoscale Clusters Via Microphase‐Separated Materials Side Chain Liquid Crystal Polymers ABA Triblock Copolymers Synthesis of AB Cross‐Linked Materials Conclusion

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Advances in the Metathesis of Olefins

Ivin

2009

Patai's Chemistry of Functional Groups

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Introduction Catalysts, Intermediates, Initiator Efficiencies Acyclic Monoenes not Containing Functional Groups Acyclic Monoenes Containing Functional Groups The Carbonyl–Olefination Reaction Acyclic Diene Metathesis ( ADMET ) Ring‐Opening Metathesis Polymerization ( ROMP ) Of Cycloalkenes Copolymerization Polymerization of Acetylenes by Olefin Metathesis Catalysts Intramolecular Metathesis Reactions of Enynes and Dienynes Metathesis Reactions of Alkynes Involving Total Cleavage of the C  C Bond

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Dielectric and pyroelectric properties of poly[2,3-bis(trifluoromethyl)norbornadiene]

Cited by 48 publications

References 11 publications

Pyroelectric polymer electrets

Pyroelectric polymer electrets

Ring‐Opening Metathesis Polymerization (ROMP) and Related Processes

Advances in the Metathesis of Olefins

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