3D NMR characterization of chain ends formed by phosphinyl radical initiated polymerization of styrene

Macromolecules

Volumn 34, Issue 4, 2001, Pages 801-811

  Meng, Huihan ^a   Saito, Takeshi ^a   Rinaldi, Peter L ^a   Wyzgoski, Faith ^a   Helfer, Carin A ^a   Mattice, Wayne L ^a   Harwood, H James ^a  

^a UNIVERSITY OF AKRON   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

CARBON; MOLECULAR DYNAMICS; MOLECULAR STRUCTURE; NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY; POLYMERIZATION;

MOLECULAR SIMULATION;

POLYSTYRENES;

EID: 0035251113     PISSN: 00249297     EISSN: None     Source Type: Journal    
DOI: 10.1021/ma000898c     Document Type: Article

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26. The NMR samples consisted of approximately 100 mg of polymer (maximum number average molecular weight of approximately 9000) dissolved in 0.7 mL of solvent. Although the NMR results were not rigorously quantitative, the detection limit can be estimated by considering the fact that there are several phosphorus-containing chain-end species present, the lowest concentration species is approximately 5-10% of the mixture, and P-CH chain ends could have easily been detected at concentrations two to three times lower.