titanium dichloride
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2019 ◽  
Vol 15 ◽  
pp. 733-745
Author(s):  
Zhargolma B Bazarova ◽  
Ludmila S Soroka ◽  
Alex A Lyapkov ◽  
Мekhman S Yusubov ◽  
Francis Verpoort

The polymerization process of dicyclopentadiene using a multicomponent catalytic system based on bis(cyclopentadienyl)titanium dichloride and diethylaluminum chloride was studied. It was demonstrated that the application of an excess of the aluminum component leads to the formation of stable charged complexes of blue discoloration, which initiate cationic polymerization of dicyclopentadiene. Unstabilized thin layers of obtained polydicyclopentadiene undergo oxidation and structuring under atmospheric oxygen. Oxidation of polydicyclopentadiene films in air occurs slowly during several weeks and can be determined by the increase of carbonyl and hydroxyl adsorption bands in infrared spectra. Along with oxidation, cross-linking processes occur in polymers, which lead to a change in physical parameters of the layers, and more precisely to a decrease in the permeability of atmospheric oxygen through the layers. Consequently, this leads to the transition of the oxidation from a kinetic mode into a diffusive mode. Such structural changes do not occur in a polymer that was stabilized by adding an antioxidant.


2013 ◽  
Vol 49 (7) ◽  
pp. 1753-1759 ◽  
Author(s):  
Supaporn Khaubunsongserm ◽  
Bunjerd Jongsomjit ◽  
Piyasan Praserthdam

2011 ◽  
Vol 130 (1-2) ◽  
pp. 243-250 ◽  
Author(s):  
Pedro González-García ◽  
T.A. Centeno ◽  
Esteban Urones-Garrote ◽  
David Ávila-Brande ◽  
L. Carlos Otero-Díaz

2010 ◽  
Vol 19 (1) ◽  
pp. 97-101 ◽  
Author(s):  
Yan-Long Qian ◽  
Xin-Rong Qin ◽  
Ji-Ling Huang ◽  
Albert Sun-Chi Chan ◽  
Shou-Shan Chen ◽  
...  

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