Ion implantation of new polymers containing imide and amide units

Wang, Y. Q.; Giedd, Ryan E.; Mohite, S. S.; Jahnke, Tamera S.; Bridwell, L.B.; Sofield, C.J.

doi:10.1016/0167-577x(91)90050-g

Cited by 4 publications

(3 citation statements)

References 13 publications

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“…But the concept of charge transfer complexes is meaningless in implantation. The reports have shown [2], [3]that the primary phenomena associated with ion beam and polymer interactions are crosslinking, conjugation and degradation of the substrate occur leading to generation of broken bonds, formation of free radicals, double bonds, and charge carriers. Therefore, in the case of implanted RVNRL, it seems that the increase in conduction with fluence may be due to an increase in concentration of double bonds and hence increase in degree of conjugation in polymer films upon ion bombardment which could be attributed to the electronic energy transfer of the incident heavy ion which produces active chemical species free radicals along the polymer chain.…”

Section: Resultsmentioning

confidence: 99%

“…There is a dramatic evolution in the backbone structure of the virgin polymer takes place and this leads to graphite like material with enhanced chemical and physical properties. This wide range of changes in the structure and properties of polymers by implant doping could provide a great opportunity to modify polymer properties in a controlled manner by selecting suitable irradiation conditions [1], [2].…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, there has been interest in the use of ion implantation to provide controlled doping levels. A number of earlier studies [2], [3] have shown that ion implantation increases the conductivity of the polymers; but the specific changes in the polymer relating to the increase in conductivity and the mechanisms of conduction are far from being well understood.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Study of the Effect of Ion implanation in Pre-vulcanized Natural rubber Latex

Najidha.¹,

Ignatius²,

Predeep³

2021

IJSRP

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It has been reported that implant doping can create an insulator-semiconductor transition in Natural Rubber (cis 1, 4 polyisoprene), a member of the well-known butadiene family, in the unvulcanized state using N + ion. In this paper, we report, for the first time, the ion beam bombardment in Radiation Vulcanized Natural Rubber Latex (RVNRL) using N + ion with energy 60 keV in the fluence range of 10 14 to 10 16 ions/cm 2 . The electrical conductivity shows about 10 orders of magnitude compared to the virgin state and is found to be increase with increasing fluence rate. Besides the UV/Vis and FTIR spectroscopic studies indicate the presence of new peaks with increase of fluence suggesting the formation of an ion beam induced conjugation in the polyisoprene backbone. A dramatic reduction in the optical band gap with the ion fluence, is also observed. The surface morphology of the implanted films has been studied by scanning electron microscopy and atomic force microscopy which indicate that the implantation of N + ions on polyisoprene surfaces introduces surface smoothening. Besides, an effort has been made to correlate the structural changes produced by both chemical and implant doping.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Study of the Effect of Ion implanation in Pre-vulcanized Natural rubber Latex

Najidha.¹,

Ignatius²,

Predeep³

2021

IJSRP

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show abstract

Composite conduction in ion-implanted polymers

Wang

Bridwell

Giedd

1993

Journal of Applied Physics

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The temperature dependence of the dc conductivity for polyamide-imide films, implanted with 50 keV As ions to different fluences, has been studied. Our high-resolution data reveal a two-component conductivity that depends on both one-dimensional variable range hopping (VRH) and three-dimensional VRH. For low fluence levels (5×1015 ions/cm2), the one-dimensional VRH is dominant while at higher fluences (1×1017 ions/cm2), the three-dimensional VRH dominates. These materials become highly disordered and form hard carbon materials along the ion track. The conductivity may be explained by 1D VRH along the ion track at low fluences while at higher fluences, regions of carbon rich material form three-dimensional structures where 3D VRH exists. This rather simple model and its composite conductivity can explain the exact curvature of the temperature dependent conductivity, while single VRH models and percolation models cannot.

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Modification of high temperature and high performance polymers by ion implantation

et al. 1993

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Several polymers with high temperature and high performance properties have been modified by ion implantation. Ions of As and Xe with energies of 50 keV and 180 keV have been implanted in the dose range of 1015 to 1017 ions/cm2. Electrical conductivities of these originally insulating polymers have been greatly enhanced after the ion implantation. Structural and compositional changes that accompanied these electrical enhancements were observed using infrared (IR) and Raman spectroscopies, scanning electron microscopy (SEM), Rutherford backscattering spectroscopy (RBS), and elastic recoil detection analysis (ERDA) methods. Our high resolution data reveal a two-component conductivity that depends on both one-dimensional variable range hopping (VRH) and three-dimensional VRH. For lightly damaged samples (e.g., 1015 ions/cm2) the 1-D VRH is dominant while for highly damaged samples (e.g., 1017 ions/cm2) the 3-D VRH dominates.

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Ion implantation of new polymers containing imide and amide units

Cited by 4 publications

References 13 publications

Study of the Effect of Ion implanation in Pre-vulcanized Natural rubber Latex

Study of the Effect of Ion implanation in Pre-vulcanized Natural rubber Latex

Composite conduction in ion-implanted polymers

Modification of high temperature and high performance polymers by ion implantation

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