ABSTRACT
Most of these additives are soluble in a number of common solvents, such as chloroform, benzene, toluene, or acetone. However, if the presence of an additive is to be detected, the solubility of the polymer matrix must also be considered. Typically, a 30-s pulse delay following a 45° pulse, with gated 1H decoupling, will ensure that relative 13C peak areas are quantitative, whether the additive is neat or in a polymer. Appropriate 1H quantitative conditions are the same as outlined for most other materials in this collection: 5-s delay after a 45° pulse. For 31 P NMR, correct relative areas result from 10-s delay following a 45° pulse, usually with continuous 1H decoupling.
