Propylene oligomers: extraction methods and characterization by FTIR, HPLC, and SEC

✍ Scribed by H. El Mansouri; N. Yagoubi; D. Scholler; A. Feigenbaum; D. Ferrier

• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 138 KB
• Volume: 71
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/(sici)1097-4628(19990118)71:3<371::aid-app2>3.0.co;2-m

✦ Synopsis

Propylene oligomers were isolated from polymer matrix by dissolution precipitation and Soxhlet methods and characterized by Fourier transform infrared spectrometry, ultraviolet, high-performance liquid chromatography, and gel permeation chromatography. Both extracts showed that these hydrocarbon chemicals have a maximal absorption at 210 nm and are eluted from a C8 column with a strong mobile phase (tetrahydrofuran). However, their average molecular weights are different depending upon the quality of extraction: the fraction obtained by the dissolution-precipitation method is homogeneous in molecular weight, whereas the one obtained by Soxhlet extraction has a higher polydispersity index (M n /M w ). The specific migration test of propylene oligomers in a food simulant (isooctane) shows total diffusion within 60 min.