2014
DOI: 10.1002/pola.27110
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Controlled ring‐opening homo‐ and copolymerization of ɛ‐caprolactone and d,l‐lactide by iminophenolate aluminum complexes: An efficient approach toward well‐defined macromonomers

Abstract: The aluminum complexes containing two iminophenolate ligands of the type (p-XC 6 H 4 NCHC 6 H 4 O-o) 2 AlR' (R 0 5Me (3, 4) or R 0 5O(CH 2 ) 4 OCH5CH 2 (5, 6), X5H (3, 5), F(4, 6)) were synthesized and characterized by 1 H, 13 C NMR spectroscopy, and X-ray crystallography. The reaction of AlMe 3 with two equivalents of substituted iminophenols gave five-coordinated {ONR} 2 AlMe (3, 4) complexes. Subsequent reaction of these methyl complexes with unsaturated alcohol, HO(CH 2 ) 4 OCH5 CH 2 , resulted in target c… Show more

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Cited by 38 publications
(15 citation statements)
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“…The calculations of molecular weight and polydispersity were carried out using polystyrene standards (Agilent Technologies, Santa Clara, CA, USA). The obtained values of M n were then corrected by a factor of 0.58 [ 47 ]. The molecular weight characteristics of the polymers are presented in Table 1 .…”
Section: Resultsmentioning
confidence: 99%
“…The calculations of molecular weight and polydispersity were carried out using polystyrene standards (Agilent Technologies, Santa Clara, CA, USA). The obtained values of M n were then corrected by a factor of 0.58 [ 47 ]. The molecular weight characteristics of the polymers are presented in Table 1 .…”
Section: Resultsmentioning
confidence: 99%
“…A detailed investigation of CL polymerization in solution initiated by dialkylaluminum monoalkoxide and aluminum trialkoxide has been performed by Duda, Penczek, Jérôme, and co‐workers. As we already mentioned, there are no reports in the literature about using simple alkylaluminum dialkoxides as initiators of ROP of cyclic esters.…”
Section: Resultsmentioning
confidence: 99%
“…Both of these alkoxides allowed to synthesize only oligomers of CL with M n ≤ 1200 g mol −1 , while the functionality (content of vinyl ether end groups) was less than unity. Recently, we showed that aluminum complexes with iminophenolate ligands modified by unsaturated alcohol living initiate homo‐ and copolymerization of CL and d,l ‐lactide affording polyesters with high content of vinyl ether end group (>80%) in broad range of molecular weights ( M n = 4500–30 000 g mol −1 ) and relatively narrow molecular weight distribution ( M w / M n = 1.1–1.5).…”
Section: Introductionmentioning
confidence: 99%
See 1 more Smart Citation
“…As was mentioned in [39], in order to know the real molecular mass of PLA, the mass determined with the use of polystyrene standards should be multiplied by a coefficient of 0.58.…”
Section: Synthesis Of Polymersmentioning
confidence: 99%