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 Halogen-free polyisobutylene (PIB) was synthesized by in situ methylation of living PIB using dimethylzinc. Quantitative methylation of living PIB was achieved within 60 min using a ratio of [(CH3)2Zn]/[TiCl4]0= 1 without any side reactions. Under similar conditions, living PIB capped with 1,1-diphenylethylene (PIB-DPE+) yielded close to 1:1 mixture of methoxy- and methyl-functionality. By using the ratio of [(CH3)2Zn]/[TiCl4]0≥ 3, however, quantitative methylation of PIB-DPE+ could be achieved in 120 min without any side reactions as confirmed by spectroscopic and chromatographic analyses.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s002890070065
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