Determination of the miscibility of phosphorus additives in polymer matrices by high resolution solid state NMR |
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Authors: | Catherine M. Sultany |
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Affiliation: | (1) Borg-Warner Chemicals, Inc., Technical Center, 26181 Washington, WV, USA |
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Abstract: | Summary The measurement of high resolution solid state NMR proton T1p values (relaxation time in the rotating frame) provides a method for the study of the compatibility of phosphorus additives with polymer matrices. Results are compared for two commercial phosphorus stabilizers, bis (2,4 di-t-butylphenyl) pentaerythritol diphosphite (Phosphite 1) and tris (2,4 di-t-butylphenyl) phosphite (Phosphite 2), in 5% masterbatches in linear low density polyethylene (LLDPE). Phosphite 1 shows compatibility even when poorly mixed while the Phosphite 2 shows separation into two domains with different relaxation rates and different chemical shifts in the solid state. |
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