Some kinetic parameters of the degradation of natural rubber induced by chloranil and iron (III) chloride, in solution

Curti, Priscila Schroeder; Vidotti, Gentil J.; Rubira, Adley F.; Muniz, Edvani C.

doi:10.1016/s0141-3910(02)00296-3

Cited by 7 publications

(5 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…He measured the appearing new peaks in CG-MS as functioning as degradation reaction. Curti et al [18] study of similar system arrived at same conclusion. This technique permits availing the appearing or disappearing, such as the identification of substance in a chemical process.…”

Section: Characterization Of 4-[(6-mentioning

confidence: 55%

Synthesis and Characterization of PPV Monomer for Subsequent Electropolymerization

Fontana

Santos

Fonseca

et al. 2015

Journal of Chemistry

View full text Add to dashboard Cite

Organic synthesis of the monomer of poly(p-phenylenevinylene) was performed starting by the 2,5-dimethylphenol compound. An iodine atom was added to one end of the aromatic ring and then the iodine atom was substituted by a cyano group. Opposite to the cyano group was added a chain of six carbon atoms and the end of the carbon chain has an added bromine atom. The characterizations of the obtained compounds were made by FTIR, GC-MS,1H, and13C NMR and showed that almost all of the proposed monomers were obtained in their totality.

show abstract

Section: Characterization Of 4-[(6-mentioning

confidence: 55%

Synthesis and Characterization of PPV Monomer for Subsequent Electropolymerization

Fontana

Santos

Fonseca

et al. 2015

Journal of Chemistry

View full text Add to dashboard Cite

show abstract

“…NR was chemically degraded by scission of double bond induced by chloranil / iron (III) chloride [67] or phenylhydrazine / iron (II) chloride [39,68,69] systems. Curti et al [67] used 2-methyl-2-butene as a model for the reactions; they found that reactions were characterized by second-order kinetics, independent of the catalyst.…”

Section: Scission Of the Double Bondmentioning

confidence: 99%

“…Curti et al [67] used 2-methyl-2-butene as a model for the reactions; they found that reactions were characterized by second-order kinetics, independent of the catalyst. The value of the rate constant decreased significantly when the reactants were diluted 10-fold.…”

Section: Scission Of the Double Bondmentioning

confidence: 99%

Degradation of non-vulcanized natural rubber renewable resource for fine chemicals used in polymer synthesis

Fainleib

Pires²,

Lucas³

et al. 2013

Polímeros

View full text Add to dashboard Cite

In the current scenario, there is growing interest in the products of degradation of rubber (natural and synthetic) for specific applications in different industry sectors, whose benefits in replacing conventionally used products are mainly related to sustainability. Since the degradation products of rubber can be used in different areas, several research groups may have the interest aroused by these products, but are not familiar with the aspects related to the chemical behavior of rubber. This review aims to bring together the key information in the published literature on the degradation of natural rubber, emphasizing metatheses reactions, oxidative damage and splitting of the double bond, in order to serve as a reference source for researchers from different fields interested in obtaining such kind of products. The structures and properties as well as additional chemical transformations resulting in oligomers of isoprene, functionalised oligomers and polymers based on both are also described.

show abstract

“…Chemical degradation takes place by using hydrogen peroxide in the presence of formic acid [ 3 ] and periodic acid [ 5 , 6 ]. A metathesis reaction is catalytically induced in the presence of transition metals, such as tungsten, molybdenum, or rhenium [ 3 ], and the double bond cleavage reactions are induced by chemical systems, such as chloranil/iron (III) chloride [ 3 , 7 ] or phenylhydrazine/iron (II) chloride [ 3 , 8 , 9 ]; however, all of these chemical substances are themselves pollutants for the environment. Ozone degrades vulcanized rubbers through its reactions with the double bonds in the main chain, causing chain splitting and reducing surface resistance [ 10 ].…”

Section: Introductionmentioning

confidence: 99%

Degradation by Electron Beam Irradiation of Some Elastomeric Composites Sulphur Vulcanized

et al. 2023

View full text Add to dashboard Cite

Composites based on natural rubber and plasticized starch obtained by the conventional method of sulfur cross-linking using four types of vulcanization accelerators (Diphenyl guanidine, 2-Mercaptobenzothiazole, N-Cyclohexyl-2-benzothiazole sulfenamide, and Tetramethylthiuram disulfide) were irradiated with an electron beam in the dose range of 150 and 450 kGy for the purpose of degradation. The vulcanization accelerators were used in different percentages and combinations, resulting in four mixtures with different potential during the cross-linking process (synergistic, activator, or additive). The resulting composites were investigated before and after irradiation in order to establish a connection between the type of accelerator mixture, irradiation dose, and composite properties (gel fraction, cross-linking degree, water absorption, mass loss in water and toluene, mechanical properties, and structural and morphological properties). The results showed that the mixtures became sensitive at the irradiation dose of 300 kGy and at the irradiation dose of 450 kGy, and the consequences of the degradation processes were discussed.

show abstract

Some kinetic parameters of the degradation of natural rubber induced by chloranil and iron (III) chloride, in solution

Cited by 7 publications

References 14 publications

Synthesis and Characterization of PPV Monomer for Subsequent Electropolymerization

Synthesis and Characterization of PPV Monomer for Subsequent Electropolymerization

Degradation of non-vulcanized natural rubber renewable resource for fine chemicals used in polymer synthesis

Degradation by Electron Beam Irradiation of Some Elastomeric Composites Sulphur Vulcanized

Contact Info

Product

Resources

About