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Polyether Diols and Triols, Copolymers THF-alkylene Oxides

3 Polyether Diols and Triols, Copolymers THF-alkylene Oxides [Pg.249]

The cationic catalysts of this copolymerisation reaction are Lewis acids (BF3, SbF5, PF5) or superacids, such as (HBF4, HSbF6, HPF6, CF3S03H) [33-38, 54, 56-59]. [Pg.249]

In the presence of a polyolic compound used as starter, the Lewis acid generates in situ complex superacids  [Pg.249]

The copolymerisation of THF with alkylene oxides (PO, EO, epichlorohydrin and so on), catalysed by strongly acidic species, is perfectly explained by the activated monomer mechanism presented before (Section 7.2). [Pg.250]

In the reaction medium there are two activated species activated oxirane and activated THF [54, 55]. [Pg.250]




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Alkylene

Alkylene diols

Alkylene oxides

Alkylene polyethers

Copolymers oxide)

Diol polyethers

Polyether diol

Polyether triols

Polyethers and Copolymer

THF

THF, oxidation

Triol

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