Raman Spectra of Polyisoprene Rubbers

Cornell, S. W.; Koenig, Jack L.

doi:10.1021/ma60011a019

Cited by 41 publications

(20 citation statements)

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“…32,33,36 The relative strength of the 1643 cm 21 is indicative of the preponderance of 3,4-structures in Isogrip. The band at 1591 cm 21 is characteristic of conjugated C5C stretches because conjugation lowers the wavenumber associated with the stretch.…”

Section: Resultsmentioning

confidence: 99%

α,ω-Alkanedithiol cross-linking of high vinyl 3,4-polyisoprene

Hlangothi

Woolard

Hlangothi

2014

Plastics, Rubber and Composites

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This paper evaluates the ability of a,v-alkanedithiols to cross-link high vinyl 3,4-polyisoprene rubber (represented by Isogrip) through the thiol-ene addition reaction and provides microstructural insights into where cross-linking takes place. The thiol-ene reactions are the hydrothiolation of a C5C bond, which can be initiated in a number of ways. It has been postulated that organic peroxides are very effective in initiating such cross-links and that a,v-alkanedithiolene cross-linking of high vinyl 3,4-polyisoprene primarily takes place on the a-carbon of the unsaturated sites of the rubber chains.

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Section: Resultsmentioning

confidence: 99%

α,ω-Alkanedithiol cross-linking of high vinyl 3,4-polyisoprene

Hlangothi

Woolard

Hlangothi

2014

Plastics, Rubber and Composites

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“…Figure 4 shows the infrared absorption spectra for the natural rubber (NR) and nanocomposites with a different concentration between 1 and 10 phr of nanoparticles calcined at 450 C and the tentative attribution bonds of the natural rubber and nanocomposites are listed in the Table IV. [27][28][29] 4000 3500 3000 2500 2000 1500 1000 500 According to Figure 4 and Table IV, all spectra exhibit all of the vibration band characteristics of the poly(cis-1, 4-isoprene) structure. It is possible to identify the presence of two main sets of bonds.…”

Section: Magnetic Characterization Of Nanopowders and Nanocompositementioning

confidence: 99%

Preparation and Structural Characterization of Vulcanized Natural Rubber Nanocomposites Containing Nickel-Zinc Ferrite Nanopowders

Bellucci¹,

Salmazo²,

Budemberg³

et al. 2012

j nanosci nanotechnol

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Single-phase polycrystalline mixed nickel-zinc ferrites belonging to Ni0.5Zn0.5Fe2O4 were prepared on a nanometric scale (mean crystallite size equal to 14.7 nm) by chemical synthesis named the modified poliol method. Ferrite nanopowder was then incorporated into a natural rubber matrix producing nanocomposites. The samples were investigated by means of infrared spectroscopy, X-ray diffraction, scanning electron microscopy and magnetic measurements. The obtained results suggest that the base concentration of nickel-zinc ferrite nanoparticles inside the polymer matrix volume greatly influences the magnetic properties of nanocomposites. A small quantity of nanoparticles, less than 10 phr, in the nanocomposite is sufficient to produce a small alteration in the semi-crystallinity of nanocomposites observed by X-ray diffraction analysis and it produces a flexible magnetic composite material with a saturation magnetization, a coercivity field and an initial magnetic permeability equal to 3.08 emu/g, 99.22 Oe and 9.42 x 10(-5) respectively.

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“…Upper: PVE vinyl overtone band (1837 cm K1 ) and PI methylene out of plane stretch (2724 cm K1 ); lower: out of plane deformation of PI vinyl carbon (837 cm K1 ) and out of plane deformation of PVE vinyl carbon (909 cm K1 ). Assignments from Ref [31][32][33][34][35]…”

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confidence: 99%