RETRACTED: Synthesis, characterization and copolymerization of two novel imide ring and silane containing vinylic macromonomers with styrene/butyl acrylate

2013 ◽  
Vol 76 (2-3) ◽  
pp. 318-327 ◽  
Author(s):  
Hamid Javaherian Naghash ◽  
Zahra Asgari
Keyword(s):  
Author(s):  
Gudrun A. Hutchins

In order to optimize the toughening effect of elastomers in engineering polymers, it is necessary to characterize the size, morphology and dispersion of the specific elastomer within the polymer matrix. For unsaturated elastomers such as butadiene or isoprene, staining with osmium tetroxide is a well established procedure. The residual carbon-carbon double bond in these materials is the reactive site and forms a 1,2-dilato complex with the OsO4. Incorporation of osmium tetroxide into the elastomer not only produces sufficient contrast for TEM, but also crosslinks the elastomer sufficiently so that ultramicrotomy can be accomplished at room temperature with minimal distortion.Blends containing saturated elastomers such as butyl acrylate (BA) and ethylene propylene diene monomer (EPDM) cannot be stained directly with OsO4 because effective reaction sites such as C=C or -NH2 are not available in sufficient number. If additional reaction sites can be introduced selectively into the elastomer by a chemical reaction or the absorption of a solvent, a modified, two-step osmium staining procedure is possible.


2020 ◽  
Vol 12 (45) ◽  
pp. 50812-50822
Author(s):  
Wenyan Wang ◽  
Zongxu Liu ◽  
Zijian Guo ◽  
Junliang Zhang ◽  
Chunmei Li ◽  
...  

2008 ◽  
Vol 29 (3) ◽  
pp. 340-346 ◽  
Author(s):  
Dan Donescu ◽  
Constantin Radovici ◽  
Cristian Petcu ◽  
Sever Serban ◽  
Mihai Cosmin Corobea ◽  
...  

Sign in / Sign up

Export Citation Format

Share Document