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Cyclic oligomers of tetraethyleneglycol succinate [O(CH 2 CH 2 O) 4 .CO.(CH 2 ) 2 .CO] x were prepared by a ring-chain reaction. The cyclic products were characterized in full. Cyclic oligomers with up to eight repeat units were fractionated using preparative gel permeation chromatography to give narrow molar mass fractions with polydispersities of...
Ring-chain equilibration reactions of poly(decamethylene adipate) (PDA) were carried out in the presence of large amounts of diluent. Good yields of cyclics [CO(CH 2 ) 4 COO(CH 2 ) 10 O] x were obtained virtually free of linear species. The individual cyclics with 18-198 skeletal bonds were completely resolved using PL-gel mixed-E gel permeation chromatographic...
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