Summary
The “living” synthesis of α,Ω-di-tert.-chloropolyisobutylene (t-Cl-telechelic PIB) has been accomplished by the use of the sterically hindered bifunctional initiator 1,3-di-(2-methoxy-2-propyl)-5-tert.-butylbenzene (tBu-m-DiCuOMe) in conjunction with BC13 coinitiator in CH3Cl or CH2Cl2 diluents at −30°C and −10°C. The living nature of the polymerizations was demonstrated by linear ¯Mn versus WPIB (g of PIB formed) plots starting at the origin and horizontal N (number of PIB moles) versus WPIB plots. The molecular weight distributions are narrow (¯MW/¯Mn < 2.0) and tend to decrease with increasing molecular weights. Number average end functionalities have been quantitated and found to be ¯Fn = 2.0±0.1.
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Wang, B., Mishra, M.K. & Kennedy, J.P. Living carbocationic polymerization. Polymer Bulletin 17, 205–211 (1987). https://doi.org/10.1007/BF00285351
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DOI: https://doi.org/10.1007/BF00285351