Abstract
AbstractThe stability of aromatic polyamide chains containing 1,7‐dicarba‐closo‐dodecaborane units was investigated in dilute solution by viscometry and sedimentation analysis at 25°C. Traces of impurities in dimethylformamide bring about degradation of the polymer and formation of polyanions, which become manifest in the viscosity by the polyelectrolyte effect. Neutral salts suppress this effect. Degradation is not hindered in an inert atmosphere. The solutions in N,N‐dimethylacetamide and N‐methyl‐2‐pyrrolidone are also unstable. No degradation occurs in solutions in tetrahydrofuran stabilized with 2,6‐di‐tert‐butyl‐4‐methylphenol. Hence, reliable measurements of the molecular characteristics of this polymer can be carried out only in stabilized peroxide‐free tetrahydrofuran.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
