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Cationic oligomerization of isoprene and structure of its oligomers
Author(s) -
Audisio Guido,
Priola Aldo,
Rossini Alessio
Publication year - 1991
Publication title -
makromolekulare chemie. macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 0258-0322
DOI - 10.1002/masy.19910470121
Subject(s) - isoprene , cationic polymerization , dimer , chemistry , mass spectrometry , fraction (chemistry) , polymer chemistry , organic chemistry , chromatography , copolymer , polymer
The results obtained in a study of isoprene cationic oligomerization in the presence of some oxyacids (H 2 SO 4 , CH 3 SO 3 H, Nafion ® H) are reported. Oligomers up to pentamers are obtained which were examined through gas chromatography/mass spectrometry analysis either of the reaction products or of the hydrogenated products. The structure of the dimer fraction was investigated and revealed the prevalent presence of α‐pinene and p‐cymene together with different cyclic unsaturated hydrocarbons. Only small quantities of linear dimers were found. Possible reaction mechanisms are presented.