Q
why are nmrs of polymers broad
I'm a seasoned industrial engineer with a keen interest in machine learning. Here to share insights on latest industry trends.
Nuclear Magnetic Resonance (NMR) spectra of polymers are often broad due to several factors that contribute to line broadening and decreased resolution compared to small molecules. Firstly, the molecular weight of polymers can be quite high, leading to slower tumbling rates in solution, which results in broader lines. Secondly, polymers exhibit structural heterogeneity, with variations in branching, end groups, and repeat units, causing a distribution of chemical environments and thus broad peaks. Thirdly, intermolecular interactions such as hydrogen bonding and van der Waals forces can lead to restricted mobility and additional broadening. Lastly, the presence of different conformations along the polymer chain can also contribute to peak broadening due to varying local magnetic fields. To improve resolution, techniques like solid-state NMR, which can provide more detailed structural information, or using dilute solutions and higher field strengths may be employed.
You May Like
You May Like
Q&A
- •how to resin coaster
- •does joann fabric sell yarn
- •do power coating at home
- •how to measure tensile strength of polymer
- •does xodo work on e-ink android
Popular Information
- •Jetty for salt exports to come up in 2 yrs
- •DCM Shriram bags ‘GEO Excellence Award’ in Large Scale Industries category
- •Caustic Soda Prices Stabilize in Asia and US, Poses a Possible Rise in Near term
- •Ecovyst to expand silica catalyst production capability
- •Baerlocher India launches PVC stabilizer manufacturing facility in MP