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Clarification of propylene glycol monoester polymorphism
Author(s) -
Lutton E. S.,
Stewart C. B.,
Martin J. B.
Publication year - 1972
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02633792
Subject(s) - polyvinyl alcohol , polymorphism (computer science) , chemistry , metastability , chromatography , organic chemistry , biochemistry , genotype , gene
A minor revision based on new data is reported for the polymorphism of 1‐propylene glycol monopalmitate and monostearate. Metastable Form I is now found to be intermediate in melting level between α and stable Form II. Form III as previously reported transforms to α below the α mp. For the 80:20 mix of 1‐propylene glycol monostearate‐2‐propylene glycol monostearate, the approximate equilibrium mixture, it is again observed that Form II is stable, melting a little above α; and Form I transforms to α slightly below the α mp; and Form III is missing.