Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7612108 | Journal of Chromatography A | 2015 | 7 Pages |
Abstract
The chemical homogeneity of telechelic polyisobutylene diol (PIB-diol), prepared by hydroboration-oxidation of allyl telechelic PIB obtained by reacting living PIB with allyltrimethylsilane, was investigated by liquid chromatography at critical conditions (LCCC) and HPLC coupled with matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS). A normal phase gradient HPLC method was developed that was able to separate the as-synthesized PIB-diol into three components; PIB-diol, PIB-monool and PIB without any OH functionality. These were analyzed by MALDI-TOF MS, which suggested that the reaction of living PIB with allyltrimethylsilane was incomplete. LCCC using refractive index (RI) detector as a concentration detector allowed separation and quantification of PIB species according to their chemical heterogeneity (PIB-diol = 95.3%, PIB-monool = 3.3%, non-functional PIB = 1.4%). The calculated number average functionality (Fn) of PIB-diol = 1.94 suggests high quality of PIB-diol suitable for high molecular weight polyurethane synthesis.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Sanjib Banerjee, Priyank N. Shah, Youncheol Jeong, Taihyun Chang, Kasyap Seethamraju, Rudolf Faust,