Hydrogenation of natural rubber latex in the presence of [Ir(cod)(PCy3)(py)]PF6

Mahittikul, A.; Prasassarakich, Pattarapan; Rempel, Garry L.

doi:10.1016/j.molcata.2008.09.006

Cited by 36 publications

(20 citation statements)

References 11 publications

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“…3). The absorptions at 1664 and 836cm −1 are belonged to the CC double bond in NRL [31]. The peaks at 1432 and 3340 cm −1 are attributed to the NH deformation and peptide linkage, respectively, which are originated from the protein in NR [32].…”

Section: Resultsmentioning

confidence: 99%

Ammonium‐assisted green fabrication of graphene/natural rubber latex composite

Feng

Peng

et al. 2012

Polymer Composites

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Direct incorporation of nano reinforcement fillers has been a challenge for composite design because of strong aggregation. In this article, a stabilizer‐free method is developed to prepare new graphene/natural rubber latex (NRL) composite as the stabilizer ammonium was diffused completely in the final heat vulcanization. The as‐prepared composite was investigated by scanning electron microscopy, static mechanical analysis, dynamic thermal mechanical analysis, swelling analysis, and positron annihilation analysis. The results demonstrated that because of good dispersion and special two‐dimensional structure of the graphene, there is strong interfacial interaction originated from the π–π interactions and hydrogen bonds between graphene and NRL matrix even at a low loading. After the introduction of graphene, the glass transition temperature (T g) and the crosslink density are improved to 6°C and 7%, respectively, with a slight decrease in overall free‐volume number (3.5%) and fraction (1%). It is also surprising to notice that the tensile strength of NRL is improved to 8% without compromising the elongation at break, which actually increases 3%. Therefore, ammonium‐assisted dispersion of graphene is feasible for graphene/NRL fabrication. POLYM. COMPOS., 2013. © 2012 Society of Plastics Engineers

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Section: Resultsmentioning

confidence: 99%

Ammonium‐assisted green fabrication of graphene/natural rubber latex composite

Feng

Peng

et al. 2012

Polymer Composites

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“…Infrared and nuclear magnetic spectroscopy techniques were used to analyze the products. 131 Mahittikul et al 132 examined the hydrogenation of natural rubber latex by using using iridium catalyst ([Ir(cod)(PCy 3 )(py)]PF 6 )). In monochlorobenzene, [Ir(cod)(PCy 3 )(py)]PF 6 was found to be an effective catalyst for hydrogenation of natural rubber latex.…”

Section: Hydrogenationmentioning

confidence: 99%

Potential use of natural rubber to produce liquid fuels using hydrous pyrolysis – a review

2016

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Natural rubber is a tropical plantation crop that mainly consists of hydrocarbon polyisoprene (cis-1,4-polyisoprene). Rubber can be converted through depolymerization into liquid, which can be used as fuels or chemical feedstock. This paper provides information on natural rubber and its alternative sources worldwide. Although we focus on hydrous pyrolysis, we also introduced various depolymerization processes, including pyrolysis, gasification, chemical degradation, catalytic cracking and hydrogenation. Hydrous pyrolysis improves the depolymerization process, such that raw materials can be fed without requiring a drying process. This process can also be conducted at low temperatures, and water can be solely used as reaction medium and can be easily separated from the oil product. This paper also reviews the role of process parameters such as temperature, rubber to water ratio, reaction time, and type of gases on product quality and quantity. Moreover, this study highlights the environmental and economic feasibility of hydrous pyrolysis.

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“…5 This solvent proved to be superior to acetone and tetrahydrofuran in the selective hydrogenation of chromone (2a, Scheme 1) with yields of 46.2%, 7.8% and 14.3%, respectively, being obtained for the different solvents after a reaction time of 24 hours. The effect of substitution around the double bond was subsequently investigated.…”

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confidence: 96%

Regioselective Hydrogenation of α,β-Unsaturated Ketones over Wilkinson’s Catalyst

Tonder¹,

Marais²,

Cole‐Hamilton³

et al. 2009

Synthesis

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Regioselective Hydrogenation of a,b-Unsaturated Ketones over Wilkinson's CatalystR e g i o s e l e c t i v e H y d r o g e n a t i o n o f a , b -U n s a t u r a t e d K e t o n e s Abstract: The reactivity of a variety of a,b-unsaturated acyclic and cyclic ketones towards regioselective hydrogenation in the presence of Wilkinson's catalyst was determined. Hydrogenation of sterically hindered a,b-unsaturated ketones proceeded at inefficient rates, if at all.

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Hydrogenation of natural rubber latex in the presence of [Ir(cod)(PCy3)(py)]PF6

Cited by 36 publications

References 11 publications

Ammonium‐assisted green fabrication of graphene/natural rubber latex composite

Ammonium‐assisted green fabrication of graphene/natural rubber latex composite

Potential use of natural rubber to produce liquid fuels using hydrous pyrolysis – a review

Regioselective Hydrogenation of α,β-Unsaturated Ketones over Wilkinson’s Catalyst

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