ISSN:
1436-2449
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
Summary 13C NMR analysis revealed the existence of additional unsaturated terminal structures in oligoisobutylene samples, in addition to the well-known-CH2C(CH3)=CH2 and-CH=C(CH3)2. Structure with a double bond between two quaternary carbons was detected both in commercial Oppanol B3 and in a oligoisobutylene (PIB) sample prepared by polymerization in CH2Cl2 with a high concentration of monomer in the presence of BCl3 at-20°C. In the latter sample, another type of the structure with a double bond between quaternary carbon and methine carbon (-CH=C(CH3)-CH2CH3) was found in a large amount.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00306241
