Preparation of a Polyethylene Latex by Catalytic Hydrogenation of a Polybuta‐1,4‐diene‐Based Dispersion

Abstract

Summary: Fully linear polyethylene‐based latexes have been prepared by the hydrogenation of polybuta‐1,4‐diene dispersions. The latter were synthesized via dispersion ring‐opening metathesis polymerization of cycloocta‐1,5‐diene, and hydrogenated using RuCl2(PPh3)3 as catalyst, without any further treatment. A high hydrogenation efficiency was achieved as demonstrated by different techniques including DSC, and 1H NMR and FT‐IR spectroscopy. The hydrogenation process could be carried out without detrimental effect on particle size and colloidal stability as evidenced by optical microscopy and light scattering analysis.Optical microscopy photograph of a polybutadiene‐based dispersion after hydrogenation. No change in size is observed.magnified imageOptical microscopy photograph of a polybutadiene‐based dispersion after hydrogenation. No change in size is observed.

Homogeneous Hydrogenation Art of Nitrile Butadiene Rubber: A Review

“…However, the product was not HNBR, but another elastomer of being acrylonitrile-ethylethylenetetramethylene copolymer. The hydrogenation was carried out at 70-75 • C and an initial Downloaded by [New York University] at 10:43 17 June 2015 55 Rempel and coworkers developed a NBR latex hydrogenation technique by which a NBR latex was directly hydrogenated without requiring pretreatment before hydrogenation and no organic solvent was used. 56 Wilkinson's catalyst and TPP were used as a catalyst and co-catalyst ligand respectively.…”

Nonaqueous and Aqueous Emulsion ROMP Reactions Induced by Environment-Friendly Latent Ruthenium Indenylidene Catalyst Bearing Morpholine Substituted Bidentate (N, O) Schiff Bases

“…These tremendous progresses in the development of ruthenium metathesis catalysts have led to novel olefin metathesis applications such as emulsion ROMP in aqueous media . First examples of ROMP reactions in aqueous media have utilized Grubbs first and second generation catalyst to polymerize norbornene under microemulsion conditions .…”

Improved molecular weight control in ring‐opening metathesis polymerization reactions in organic and aqueous media using N‐heterocyclic carbene–ruthenium arene/alkyne catalyst systems

“…Parallel to the developments in ROMP chemistry, several ruthenium‐based catalytic systems were reported for emulsion ROMP in aqueous media to synthesize finely dispersed nano‐sized particles . Ruthenium alkylidene‐based catalysts were used in emulsion ROMP of norbornene .…”