i like this post (click again to cancel)
1
i dont like this post (click again to cancel) remove favorite mark from this question (click again to restore mark)

Hi, I was asked to study polyethylene degradated by gamma and Xrays. I planed to measure relaxations rates, but which one is the most relevant to highlight chain degradation? T1, T2, but on 1H or 13C? By reading some articles, I feel T2 is not very interesting, right? T1rho experiments seems to give good results, I have found 2 sequences in Bruker's library, T1rhoX (CP step then variable length spin lock pulse on 13C channel) and T1rhoH (CP step then variable length spin lock pulse on 1H channel), and there is also the more classical variable contact time experiment, I don't know which one to use... Is there a more relevant relaxation rate to measure or should I try all of them and see which one gives good results ? I was also asked to study wood degradation in the same way. I have started to look for bibliography, but if anyone can suggest interesting articles... Thanks Anne

asked Mar 15 '11 at 12:48

Anne%20Baudouin's gravatar image

Anne Baudouin
26

updated Mar 16 '11 at 08:10

Evgeny%20Fadeev's gravatar image

Evgeny Fadeev
5571

Be the first one to answer this question!
Please start posting your answer anonymously - your answer will be saved within the current session and published after you log in or create a new account. Please try to give a good answer, for discussions, please use comments and please do remember to vote (login to vote)
toggle preview

powered by CNPROG