Chemical Forums

Chemistry Forums for Students => Organic Chemistry Forum => Organic Chemistry Forum for Graduate Students and Professionals => Topic started by: Mitch on August 30, 2006, 04:10:08 AM

Title: Does sonication break bonds for a 10kdalton polymer.
Post by: Mitch on August 30, 2006, 04:10:08 AM

Does sonication break bonds in general?

Title: Re: Does sonication break bonds for a 10kdalton polymer.
Post by: Albert on August 30, 2006, 05:16:36 AM

I think it depends on the conditions (i.e. time).

Title: Re: Does sonication break bonds for a 10kdalton polymer.
Post by: Dude on September 01, 2006, 10:18:34 AM

There are a number of studies that indicate that high intensity sound waves can cause mechanochemical degradation of polymers.  If you need to degas a viscous goo and maintain the original properties (viscosity, GPC molar mass), I would try to gently heat the sample to lower the viscosity for quicker air release.

Title: Re: Does sonication break bonds for a 10kdalton polymer.
Post by: P on September 01, 2006, 11:39:53 AM

Do you have access to a GPC/SEC machine?    You could take your polymer and measure the MW and polydispersity and then dissolve the sample up and give it a couple of hours sonification and then GPC it again and compare. ??

Title: Re: Does sonication break bonds for a 10kdalton polymer.
Post by: DrCMS on September 04, 2006, 04:59:52 AM

Sonication can break bonds.