Chain Walking in the AlCl Catalyzed Cationic Polymerization of α-Olefins.

Continuing efforts aimed at performing the 1-decene polymerization to low viscosity polyalphaolefins (PAO)s using a less hazardous AlCl catalyst than boron-based analogs, the basic mechanisms of this system were revealed in this research. In this aspect, neat AlCl and AlCl /toluene were carried out to perform 1-decene polymerizations. Microstructure analyses of the as-synthesized oils revealed low molecular weight (708 vs.

Efficient hydro-finishing of polyalfaolefin based lubricants under mild reaction condition using Pd on ligands decorated halloysite.

To achieve efficient hydrofinishing of polyalfaolefin based lubricants under mild reaction condition, a novel catalyst is designed and fabricated through supporting Pd nanoparticles on ligand functionalized halloysite clay. In this line, first, using DFT calculations a scan of a library of 36 diamines was performed to find the most proper ligand that can provide the best interactions with Pd nanoparticles, improve Pd anchoring and supress Pd leaching. Characterization of the rather strong covalent and ionic interactions by a Mayer Bond Order analysis, and the non-covalent interactions by NCI plots as well, unveiled the preference for a particular system.

In-situ photocrosslinkable nanohybrid elastomer based on polybutadiene/polyhedral oligomeric silsesquioxane.

Hydroxyl functionalized nano-sized POSS or ethyleneglycol as diol monomers was incorporated to hydroxyl-terminated polybutadiene (HTPBD) chain in the presence of fumaryl chloride as extender. Blue light photocrosslinking system based on camphorquinone (photoinitiator) and dimethylaminoethyl methacrylate (accelerator) was applied to cure these two synthesized fumarate based macromers. Self-crosslinkability of unsaturated macromers and also crosslinking in presence of a reactive diluent were investigated in absence and presence of 1,4-butanediol dimethacrylate, respectively.