Anisotropy of electrical conductivity in doubly oriented nylon 66

Seanor, D. A.

doi:10.1002/polc.5070170117

Cited by 26 publications

(1 citation statement)

References 23 publications

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“…Such as Seanor [1,2] has reported that in nylon 6-6, above 120 8C, there is an ionic conduction while below and at least upto 80 8C it is electronic. In PVC, electronic conduction is reported by Flemming and Renicar [3] whereas Kosaki [4] favors hoping ionic mechanism.…”

Section: Introductionmentioning

confidence: 97%

DC Electrical Study of Modified PMMA, PVC and their Blend

Soman

Kelkar

2010

Macromolecular Symposia

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Summary: Thin films of high molecular weight PMMA, PVC and their blend were prepared with solution cast method. Further they were modified by adding Camphor Sulphonic Acid (CSA) to them. DSC studies indicate single glass transition temperature (Tg) for unmodified as well as modified blends indicating the miscibility of polymers. FTIR studies show the interaction between CSA-PVC, CSA-PMMA, CSA-(PVCþPMMA) blend. The D.C. electrical study was carried out at various temperatures from room temperature (307 K) to 373 K. After modification the variation of DC conductivity (s) is found to decrease in PVC and the PVC-PMMA blend whereas it is found to increase in PMMA with rise in temperature.

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Section: Introductionmentioning

confidence: 97%

DC Electrical Study of Modified PMMA, PVC and their Blend

Soman

Kelkar

2010

Macromolecular Symposia

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Über das Gleichstromverhalten von Polyamiden. Teil I: Zeitabhängige Gleichströme in aliphatischen Polyamiden

Seibert¹,

Rehage

1978

Angew. Makromol. Chem.

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Es wurden die zeitabhangigen Gleichstrome in aliphatischen Polyamiden und Oligoamiden untersucht. Hierbei konnten die instationaren Strome bei Polyamiden und hoheren Oligoamiden bei tieferen Temperaturen aus der Ruckstandsbildung erklart werden, die im wesentlichen durch Dipolorientierungsstrome verursacht wird. Die Zeitabhangigkeit der Gleichstrome in Polyamiden bei hoheren Temperaturen sowie in niedrigen Oligoamiden bei tieferen Temperaturen wird durch die Bildung von Raumladungen verursacht, die sich durch Einfangen von Ladungstragern an Kristallitgrenzen und polaren Gruppen in der Kette ausbilden. Die Untersuchung von Raumladungsstromen wies darauf hin, daf3 mindestens zwei Ladungstragerarten am Ladungstransport beteiligt sind. SUMMARY:The time-dependent d. c. conductivity in aliphatic polyamids and oligoamids was determined. The transient current in polyamids and higher oligoamids is related to the formation of electric residuum, mainly caused by orientation of dipols. The time-dependent currents in the polyamids at higher temperatures and in the lower oligoamids at lower temperatures are related to the formation of space charges, created by trapping of charge carriers at the boundaries of crystallites or on polar groups of the chain molecules. At least two kinds of charge carriers take part in charge transport.

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Thermosensitive dielectric properties in polyamide–phenol hybrid compounds and their application to the temperature‐sensing wire

Kishimoto

Hosaka

Shimotsuma

1986

J of Applied Polymer Sci

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SynopsisThermosensitive dielectric properties in polyamide-phenol hybrid compounds have been studied. The polyamide-phenol hybrid compounds are constituted of p-hydroxybenzoate-formaldehyde condensation oligomer dispersed molecularly in nylon 12 and polyamide copolymer. These materials are less hygroscopic than nylon 12 which is the least hygroscopic among polyamide homopolymers. It will be because the phenol group coordinates to amide group as the less hygroscopic "pseudo-water" instead of water. One of these materials has also shown an intrinsic hydrophobic effect of hydrogen bond segment due to the "hybrid effect" between polyamide and phenol. The thermosensitive dielectric properties are based on the temperature dependence of intermolecular hydrogen bond behaviors by amide and phenol groups, which have been discussed in relation with the molecular behaviors. The relationship with polarizations constituting dielectric constant and hydrogen bonding molecular segments, and ac hopping conduction behaviors by proton carriers have also been discussed. These materials are applied as a temperature-sensing material in a flexible thermosensing heater wire, which has three functions, that is, thermosensing, heating, and fusing for safe in the case of an abnormal overheat. As the features for a sensing material, these materials show the humidity low-dependence and highly thermal stability, and will be situated as one of the high-performance sensing material useful for the electric warmer such as an electric blanket.

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Anisotropy of electrical conductivity in doubly oriented nylon 66

Cited by 26 publications

References 23 publications

DC Electrical Study of Modified PMMA, PVC and their Blend

DC Electrical Study of Modified PMMA, PVC and their Blend

Über das Gleichstromverhalten von Polyamiden. Teil I: Zeitabhängige Gleichströme in aliphatischen Polyamiden

Thermosensitive dielectric properties in polyamide–phenol hybrid compounds and their application to the temperature‐sensing wire

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